diff --git a/Cargo.lock b/Cargo.lock
index bb688e6..65e1bfa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1652,7 +1652,7 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "lesavka_client"
-version = "0.22.18"
+version = "0.22.19"
 dependencies = [
  "anyhow",
  "async-stream",
@@ -1686,7 +1686,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_common"
-version = "0.22.18"
+version = "0.22.19"
 dependencies = [
  "anyhow",
  "base64",
@@ -1698,7 +1698,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_server"
-version = "0.22.18"
+version = "0.22.19"
 dependencies = [
  "anyhow",
  "base64",
diff --git a/client/Cargo.toml b/client/Cargo.toml
index e15ccc2..250ea59 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -4,7 +4,7 @@ path                    = "src/main.rs"
 
 [package]
 name                    = "lesavka_client"
-version                 = "0.22.18"
+version                 = "0.22.19"
 edition                 = "2024"
 
 [dependencies]
diff --git a/client/src/app_support.rs b/client/src/app_support.rs
index 7296df1..fa89c8e 100644
--- a/client/src/app_support.rs
+++ b/client/src/app_support.rs
@@ -54,7 +54,7 @@ pub fn next_delay(current: Duration) -> Duration {
 /// Inputs: operator/env codec text. Output: the supported transport codec when
 /// recognized. Why: the client must not silently fall back to a differently
 /// calibrated upstream path when the UI asks for HEVC or MJPEG.
-fn parse_camera_codec(raw: &str) -> Option<CameraCodec> {
+pub(crate) fn parse_camera_codec(raw: &str) -> Option<CameraCodec> {
     match raw.trim().to_ascii_lowercase().as_str() {
         "mjpeg" | "mjpg" | "jpeg" => Some(CameraCodec::Mjpeg),
         "h264" => Some(CameraCodec::H264),
diff --git a/client/src/input/camera.rs b/client/src/input/camera.rs
index 5afe6b8..330afb4 100644
--- a/client/src/input/camera.rs
+++ b/client/src/input/camera.rs
@@ -33,14 +33,14 @@ fn env_u32(name: &str, default: u32) -> u32 {
         .unwrap_or(default)
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum CameraCodec {
     H264,
     Hevc,
     Mjpeg,
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct CameraConfig {
     pub codec: CameraCodec,
     pub width: u32,
diff --git a/client/src/sync_probe/capture/video_packets.rs b/client/src/sync_probe/capture/video_packets.rs
index 64e98b3..5075080 100644
--- a/client/src/sync_probe/capture/video_packets.rs
+++ b/client/src/sync_probe/capture/video_packets.rs
@@ -250,18 +250,24 @@ fn pick_h264_encoder(fps: u32) -> Result<String> {
 /// Why: the client-to-server probe should exercise the same HEVC transport
 /// shape as real webcam uplink without requiring a specific GPU encoder.
 fn pick_hevc_encoder(fps: u32) -> Result<String> {
+    let keyframe_interval = low_latency_hevc_keyframe_interval(fps);
+    if gst::ElementFactory::find("nvh265enc").is_some() {
+        return Ok(format!(
+            "video/x-raw,format=NV12 ! nvh265enc preset=p1 tune=ultra-low-latency rc-mode=cbr bitrate=3000 max-bitrate=3000 vbv-buffer-size=3000 gop-size={} zerolatency=true repeat-sequence-header=true",
+            keyframe_interval
+        ));
+    }
+    for encoder in ["vah265enc", "vaapih265enc", "v4l2h265enc"] {
+        if gst::ElementFactory::find(encoder).is_some() {
+            return Ok(encoder.to_string());
+        }
+    }
     if gst::ElementFactory::find("x265enc").is_some() {
-        let keyframe_interval = low_latency_hevc_keyframe_interval(fps);
         return Ok(format!(
             "x265enc tune=zerolatency speed-preset=ultrafast bitrate=2500 key-int-max={}",
             keyframe_interval
         ));
     }
-    for encoder in ["nvh265enc", "vah265enc", "vaapih265enc", "v4l2h265enc"] {
-        if gst::ElementFactory::find(encoder).is_some() {
-            return Ok(encoder.to_string());
-        }
-    }
     bail!("no usable HEVC encoder found for sync probe")
 }
 
diff --git a/client/src/sync_probe/config.rs b/client/src/sync_probe/config.rs
index 4500d1e..b50b9d3 100644
--- a/client/src/sync_probe/config.rs
+++ b/client/src/sync_probe/config.rs
@@ -5,6 +5,7 @@ use std::path::PathBuf;
 use std::time::Duration;
 
 use crate::app_support::DEFAULT_SERVER_ADDR;
+use crate::input::camera::CameraCodec;
 use crate::sync_probe::signature::first_unsupported_event_code;
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -17,6 +18,10 @@ pub struct ProbeConfig {
     pub marker_tick_period: u32,
     pub event_width_codes: Vec<u32>,
     pub timeline_json: Option<PathBuf>,
+    pub camera_codec: Option<CameraCodec>,
+    pub camera_width: Option<u32>,
+    pub camera_height: Option<u32>,
+    pub camera_fps: Option<u32>,
 }
 
 #[derive(Debug, Eq, PartialEq)]
@@ -26,7 +31,7 @@ pub enum ParseOutcome {
 }
 
 pub fn usage() -> &'static str {
-    "Usage: lesavka-sync-probe [--server http://HOST:50051] [--duration-seconds 10] [--warmup-seconds 4] [--pulse-period-ms 1000] [--pulse-width-ms 120] [--marker-tick-period 5] [--event-width-codes 1,2,3] [--timeline-json PATH]"
+    "Usage: lesavka-sync-probe [--server http://HOST:50051] [--duration-seconds 10] [--warmup-seconds 4] [--pulse-period-ms 1000] [--pulse-width-ms 120] [--marker-tick-period 5] [--event-width-codes 1,2,3] [--timeline-json PATH] [--camera-codec hevc|mjpeg] [--camera-mode WIDTHxHEIGHT@FPS]"
 }
 
 pub fn parse_args_outcome_from<I, S>(args: I) -> Result<ParseOutcome>
@@ -43,6 +48,10 @@ where
     let mut marker_tick_period = 5u32;
     let mut event_width_codes = Vec::<u32>::new();
     let mut timeline_json = None::<PathBuf>;
+    let mut camera_codec = None::<CameraCodec>;
+    let mut camera_width = None::<u32>;
+    let mut camera_height = None::<u32>;
+    let mut camera_fps = None::<u32>;
 
     while let Some(arg) = args.next() {
         match arg.as_str() {
@@ -114,6 +123,48 @@ where
                 }
                 timeline_json = Some(PathBuf::from(path));
             }
+            "--camera-codec" => {
+                let raw = args.next().context("missing value after --camera-codec")?;
+                camera_codec = crate::app_support::parse_camera_codec(&raw)
+                    .with_context(|| format!("unsupported camera codec `{raw}`\n{}", usage()))
+                    .map(Some)?;
+            }
+            "--camera-mode" => {
+                let (width, height, fps) = parse_camera_mode(args.next())?;
+                camera_width = Some(width);
+                camera_height = Some(height);
+                camera_fps = Some(fps);
+            }
+            "--camera-width" => {
+                camera_width = Some(parse_u32_arg(
+                    args.next(),
+                    "--camera-width",
+                    "camera width must be positive",
+                )?);
+                if camera_width == Some(0) {
+                    bail!("camera width must be positive\n{}", usage());
+                }
+            }
+            "--camera-height" => {
+                camera_height = Some(parse_u32_arg(
+                    args.next(),
+                    "--camera-height",
+                    "camera height must be positive",
+                )?);
+                if camera_height == Some(0) {
+                    bail!("camera height must be positive\n{}", usage());
+                }
+            }
+            "--camera-fps" => {
+                camera_fps = Some(parse_u32_arg(
+                    args.next(),
+                    "--camera-fps",
+                    "camera fps must be positive",
+                )?);
+                if camera_fps == Some(0) {
+                    bail!("camera fps must be positive\n{}", usage());
+                }
+            }
             "--help" | "-h" => return Ok(ParseOutcome::Help),
             _ => bail!("unexpected argument `{arg}`\n{}", usage()),
         }
@@ -134,6 +185,10 @@ where
         marker_tick_period,
         event_width_codes,
         timeline_json,
+        camera_codec,
+        camera_width,
+        camera_height,
+        camera_fps,
     }))
 }
 
@@ -153,6 +208,35 @@ fn parse_u32_arg(value: Option<String>, flag: &str, context: &str) -> Result<u32
         .with_context(|| format!("{context}\n{}", usage()))
 }
 
+fn parse_camera_mode(value: Option<String>) -> Result<(u32, u32, u32)> {
+    let raw = value
+        .context("missing value after --camera-mode")?
+        .trim()
+        .to_string();
+    let Some((width, rest)) = raw.split_once('x') else {
+        bail!("camera mode must look like WIDTHxHEIGHT@FPS\n{}", usage());
+    };
+    let Some((height, fps)) = rest.split_once('@') else {
+        bail!("camera mode must look like WIDTHxHEIGHT@FPS\n{}", usage());
+    };
+    let width = width
+        .parse::<u32>()
+        .with_context(|| format!("camera mode width must be numeric\n{}", usage()))?;
+    let height = height
+        .parse::<u32>()
+        .with_context(|| format!("camera mode height must be numeric\n{}", usage()))?;
+    let fps = fps
+        .parse::<u32>()
+        .with_context(|| format!("camera mode fps must be numeric\n{}", usage()))?;
+    if width == 0 || height == 0 || fps == 0 {
+        bail!(
+            "camera mode dimensions and fps must be positive\n{}",
+            usage()
+        );
+    }
+    Ok((width, height, fps))
+}
+
 /// Parse the event identity sequence for coded synthetic probes.
 ///
 /// Inputs: optional raw CLI value after `--event-width-codes`.
@@ -212,6 +296,10 @@ mod tests {
         assert_eq!(config.marker_tick_period, 5);
         assert!(config.event_width_codes.is_empty());
         assert_eq!(config.timeline_json, None);
+        assert_eq!(config.camera_codec, None);
+        assert_eq!(config.camera_width, None);
+        assert_eq!(config.camera_height, None);
+        assert_eq!(config.camera_fps, None);
     }
 
     #[test]
@@ -233,6 +321,10 @@ mod tests {
             "1,2,3",
             "--timeline-json",
             "/tmp/client-timeline.json",
+            "--camera-codec",
+            "hevc",
+            "--camera-mode",
+            "1920x1080@30",
         ])
         .expect("configured run");
         let ParseOutcome::Run(config) = outcome else {
@@ -250,6 +342,13 @@ mod tests {
             config.timeline_json,
             Some("/tmp/client-timeline.json".into())
         );
+        assert_eq!(
+            config.camera_codec,
+            Some(crate::input::camera::CameraCodec::Hevc)
+        );
+        assert_eq!(config.camera_width, Some(1920));
+        assert_eq!(config.camera_height, Some(1080));
+        assert_eq!(config.camera_fps, Some(30));
     }
 
     #[test]
@@ -260,6 +359,9 @@ mod tests {
         assert!(parse_args_outcome_from(["--marker-tick-period", "0"]).is_err());
         assert!(parse_args_outcome_from(["--event-width-codes", "0"]).is_err());
         assert!(parse_args_outcome_from(["--event-width-codes", "17"]).is_err());
+        assert!(parse_args_outcome_from(["--camera-mode", "1920x1080"]).is_err());
+        assert!(parse_args_outcome_from(["--camera-mode", "0x1080@30"]).is_err());
+        assert!(parse_args_outcome_from(["--camera-codec", "vp9"]).is_err());
     }
 
     #[test]
@@ -274,6 +376,8 @@ mod tests {
         assert!(parse_args_outcome_from(["--duration-seconds"]).is_err());
         assert!(parse_args_outcome_from(["--marker-tick-period"]).is_err());
         assert!(parse_args_outcome_from(["--timeline-json"]).is_err());
+        assert!(parse_args_outcome_from(["--camera-codec"]).is_err());
+        assert!(parse_args_outcome_from(["--camera-mode"]).is_err());
         assert!(parse_args_outcome_from(["--wat"]).is_err());
     }
 
diff --git a/client/src/sync_probe/runner.rs b/client/src/sync_probe/runner.rs
index cb73a64..d785cb5 100644
--- a/client/src/sync_probe/runner.rs
+++ b/client/src/sync_probe/runner.rs
@@ -43,8 +43,20 @@ async fn run_sync_probe(config: ProbeConfig) -> Result<()> {
     if !caps.bundled_webcam_media {
         bail!("server does not advertise bundled webcam media; refusing to measure split upstream");
     }
-    let camera = app_support::camera_config_from_caps(&caps)
+    let mut camera = app_support::camera_config_from_caps(&caps)
         .context("server handshake did not include a complete camera profile")?;
+    if let Some(codec) = config.camera_codec {
+        camera.codec = codec;
+    }
+    if let Some(width) = config.camera_width {
+        camera.width = width;
+    }
+    if let Some(height) = config.camera_height {
+        camera.height = height;
+    }
+    if let Some(fps) = config.camera_fps {
+        camera.fps = fps;
+    }
 
     let schedule = if config.event_width_codes.is_empty() {
         PulseSchedule::new(
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 9550958..9a53bd4 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name                    = "lesavka_common"
-version                 = "0.22.18"
+version                 = "0.22.19"
 edition                 = "2024"
 build                   = "build.rs"
 
diff --git a/scripts/daemon/lesavka-core.sh b/scripts/daemon/lesavka-core.sh
index 2e0b327..8e450d9 100755
--- a/scripts/daemon/lesavka-core.sh
+++ b/scripts/daemon/lesavka-core.sh
@@ -304,6 +304,49 @@ if [[ -z $UVC_INTERVAL ]]; then
     UVC_INTERVAL=$((10000000 / UVC_FPS))
 fi
 UVC_FRAME_SIZE=${LESAVKA_UVC_FRAME_SIZE:-$((UVC_WIDTH * UVC_HEIGHT * 2))}
+UVC_INTERVAL_30=${LESAVKA_UVC_INTERVAL_30:-333333}
+UVC_INTERVAL_20=${LESAVKA_UVC_INTERVAL_20:-500000}
+
+uvc_selected_frame_index() {
+    case "${UVC_WIDTH}x${UVC_HEIGHT}" in
+        1920x1080) echo 1 ;;
+        1280x720) echo 2 ;;
+        *) echo 2 ;;
+    esac
+}
+
+uvc_frame_size_for() {
+    local width=$1 height=$2
+    if [[ $width == "$UVC_WIDTH" && $height == "$UVC_HEIGHT" && -n ${LESAVKA_UVC_FRAME_SIZE:-} ]]; then
+        echo "$LESAVKA_UVC_FRAME_SIZE"
+    else
+        echo $((width * height * 2))
+    fi
+}
+
+uvc_default_interval_for() {
+    local width=$1 height=$2
+    if [[ $width == "$UVC_WIDTH" && $height == "$UVC_HEIGHT" ]]; then
+        echo "$UVC_INTERVAL"
+    else
+        echo "$UVC_INTERVAL_30"
+    fi
+}
+
+write_mjpeg_frame_descriptor() {
+    local name=$1 width=$2 height=$3
+    local frame="$F/streaming/mjpeg/m/$name"
+    mkdir -p "$frame"
+    echo 0 >"$frame/bmCapabilities"
+    echo "$width" >"$frame/wWidth"
+    echo "$height" >"$frame/wHeight"
+    echo "$(uvc_frame_size_for "$width" "$height")" >"$frame/dwMaxVideoFrameBufferSize"
+    echo "$(uvc_default_interval_for "$width" "$height")" >"$frame/dwDefaultFrameInterval"
+    cat <<EOF >"$frame/dwFrameInterval"
+${UVC_INTERVAL_30}
+${UVC_INTERVAL_20}
+EOF
+}
 
 wait_for_enum() {
     local tries=${1:-50}   # 50 x 100ms = 5s
@@ -516,19 +559,11 @@ if [[ -z $DISABLE_UVC ]]; then
 # ── 1.  FORMAT DESCRIPTOR ──────────────────────────────────────────
   if [[ "$UVC_CODEC" == "mjpeg" ]]; then
     mkdir -p "$F/streaming/mjpeg/m"
-    echo 1 >"$F/streaming/mjpeg/m/bDefaultFrameIndex" 2>/dev/null || true
+    echo "$(uvc_selected_frame_index)" >"$F/streaming/mjpeg/m/bDefaultFrameIndex" 2>/dev/null || true
     echo 0 >"$F/streaming/mjpeg/m/bmaControls" 2>/dev/null || true
 
-    mkdir -p "$F/streaming/mjpeg/m/720p"
-    echo 0 >"$F/streaming/mjpeg/m/720p/bmCapabilities"
-    echo "$UVC_WIDTH"  >"$F/streaming/mjpeg/m/720p/wWidth"
-    echo "$UVC_HEIGHT" >"$F/streaming/mjpeg/m/720p/wHeight"
-    echo "$UVC_FRAME_SIZE" >"$F/streaming/mjpeg/m/720p/dwMaxVideoFrameBufferSize"
-    echo "$UVC_INTERVAL" >"$F/streaming/mjpeg/m/720p/dwDefaultFrameInterval"
-    cat <<EOF >"$F/streaming/mjpeg/m/720p/dwFrameInterval"
-${UVC_INTERVAL}
-$((UVC_INTERVAL * 2))
-EOF
+    write_mjpeg_frame_descriptor 1080p 1920 1080
+    write_mjpeg_frame_descriptor 720p 1280 720
   else
     # uncompressed YUY2, 16 bpp
     mkdir -p "$F/streaming/uncompressed/yuyv"
diff --git a/scripts/install/server.sh b/scripts/install/server.sh
index a796e7a..d9646df 100755
--- a/scripts/install/server.sh
+++ b/scripts/install/server.sh
@@ -552,7 +552,11 @@ live_uvc_descriptor_matches_request() {
   case "$(live_uvc_descriptor_codec)" in
     mjpeg)
       [[ "$INSTALL_UVC_CODEC" == "mjpeg" ]] || return 1
-      frame_root="$function_root/streaming/mjpeg/m/720p"
+      case "${LESAVKA_UVC_WIDTH:-1280}x${LESAVKA_UVC_HEIGHT:-720}" in
+        1920x1080) frame_root="$function_root/streaming/mjpeg/m/1080p" ;;
+        1280x720) frame_root="$function_root/streaming/mjpeg/m/720p" ;;
+        *) return 1 ;;
+      esac
       ;;
     yuyv)
       [[ "$INSTALL_UVC_CODEC" == "yuyv" ]] || return 1
@@ -565,7 +569,8 @@ live_uvc_descriptor_matches_request() {
   [[ -r "$frame_root/wWidth" && -r "$frame_root/wHeight" && -r "$frame_root/dwDefaultFrameInterval" ]] || return 1
   [[ "$(cat "$frame_root/wWidth" 2>/dev/null || true)" == "${LESAVKA_UVC_WIDTH:-1280}" ]] || return 1
   [[ "$(cat "$frame_root/wHeight" 2>/dev/null || true)" == "${LESAVKA_UVC_HEIGHT:-720}" ]] || return 1
-  [[ "$(cat "$frame_root/dwDefaultFrameInterval" 2>/dev/null || true)" == "${LESAVKA_UVC_INTERVAL:-333333}" ]]
+  grep -qx "${LESAVKA_UVC_INTERVAL:-333333}" "$frame_root/dwFrameInterval" 2>/dev/null \
+    || [[ "$(cat "$frame_root/dwDefaultFrameInterval" 2>/dev/null || true)" == "${LESAVKA_UVC_INTERVAL:-333333}" ]]
 }
 
 live_uac_descriptor_matches_request() {
diff --git a/scripts/manual/client_rct_remote_capture.sh b/scripts/manual/client_rct_remote_capture.sh
new file mode 100755
index 0000000..64f9ce5
--- /dev/null
+++ b/scripts/manual/client_rct_remote_capture.sh
@@ -0,0 +1,184 @@
+#!/usr/bin/env bash
+# scripts/manual/client_rct_remote_capture.sh
+# Remote Tethys-side UVC/UAC capture helper for run_client_to_rct_transport_probe.sh.
+set -euo pipefail
+remote_capture=$1
+capture_seconds=$2
+width=$3
+height=$4
+fps=$5
+capture_stack=$6
+pulse_tool=$7
+video_mode=$8
+anchor_silence=$9
+preroll_discard=${10}
+preroll_settle=${11}
+ready_settle=${12}
+ready_marker=${13}
+
+resolve_video_device() {
+  find /dev/v4l/by-id -maxdepth 1 -type l \
+    -name 'usb-Lesavka_Lesavka_Composite*video-index0' | sort | head -n 1
+}
+
+resolve_pulse_source() {
+  pactl list short sources 2>/dev/null \
+    | awk '
+      /alsa_input\..*Lesavka_Lesavka_Composite/ { print $2; found=1; exit }
+      /Lesavka_Lesavka_Composite/ && $2 !~ /\.monitor$/ && !fallback { fallback=$2 }
+      END {
+        if (found) exit 0
+        if (fallback != "") { print fallback; exit 0 }
+        exit 1
+      }
+    '
+}
+
+current_video_profile() {
+  v4l2-ctl -d "${video_device}" --all 2>/dev/null \
+    | awk '
+      /Width\/Height[[:space:]]*:/ {
+        split($0, a, ":")
+        gsub(/^[ \t]+/, "", a[2])
+        split(a[2], wh, "/")
+        width=wh[1]
+        height=wh[2]
+        next
+      }
+      /Frames per second[[:space:]]*:/ {
+        split($0, a, ":")
+        gsub(/^[ \t]+/, "", a[2])
+        split(a[2], fps_parts, "\\.")
+        fps=fps_parts[1]
+      }
+      END {
+        if (width && height && fps) {
+          printf "%s %s %s\n", width, height, fps
+          exit 0
+        }
+        exit 1
+      }
+    '
+}
+
+gst_audio_mixer_element() {
+  if gst-inspect-1.0 audiomixer 2>/dev/null | grep -q 'ignore-inactive-pads'; then
+    printf 'audiomixer name=amix ignore-inactive-pads=true'
+  else
+    printf 'audiomixer name=amix'
+  fi
+}
+
+run_preroll() {
+  local video_device=$1
+  local seconds=$2
+  [[ "${seconds}" =~ ^[0-9]+$ && "${seconds}" -gt 0 ]] || return 0
+  printf 'discarding %ss of post-enumeration capture before probe\n' "${seconds}" >&2
+  timeout --kill-after=5 --signal=INT "$((seconds + 5))" \
+    gst-launch-1.0 -q -e v4l2src device="${video_device}" do-timestamp=true num-buffers="$((fps * seconds))" \
+      ! "image/jpeg,width=${width},height=${height},framerate=${fps}/1" ! fakesink \
+    >/dev/null 2>&1 || true
+  if [[ "${preroll_settle}" =~ ^[0-9]+$ && "${preroll_settle}" -gt 0 ]]; then
+    printf 'settling %ss after preroll discard\n' "${preroll_settle}" >&2
+    sleep "${preroll_settle}"
+  fi
+}
+
+run_gst_pulse_capture() {
+  local video_device=$1
+  local pulse_source=$2
+  local video_caps="image/jpeg,width=${width},height=${height},framerate=${fps}/1"
+  local decode_chain="jpegdec !"
+  local audio_mixer
+  audio_mixer="$(gst_audio_mixer_element)"
+  local audio_anchor=()
+  if [[ "${anchor_silence}" != "0" ]]; then
+    printf 'anchoring Pulse capture audio timeline with generated silence\n' >&2
+    audio_anchor=(audiotestsrc wave=silence is-live=true do-timestamp=true ! "audio/x-raw,rate=48000,channels=2" ! queue ! amix.)
+  fi
+  printf 'capture_start_unix_ns=%s\n' "$(date +%s%N)" >&2
+  if [[ "${video_mode}" == "cfr" ]]; then
+    timeout --kill-after=5 --signal=INT "$((capture_seconds + 3))" \
+      gst-launch-1.0 -q -e \
+        matroskamux name=mux ! filesink location="${remote_capture}" \
+        v4l2src device="${video_device}" do-timestamp=true ! ${video_caps} ! \
+          ${decode_chain} videoconvert ! videorate ! video/x-raw,framerate="${fps}"/1 ! \
+          x264enc tune=zerolatency speed-preset=ultrafast key-int-max=1 bitrate=5000 ! \
+          h264parse ! queue ! mux. \
+        ${audio_mixer} ! audio/x-raw,rate=48000,channels=2 ! queue ! mux. \
+        "${audio_anchor[@]}" \
+        pulsesrc device="${pulse_source}" do-timestamp=true ! audio/x-raw,rate=48000,channels=2 ! \
+          audioconvert ! audioresample ! audio/x-raw,rate=48000,channels=2 ! queue ! amix. &
+  else
+    timeout --kill-after=5 --signal=INT "$((capture_seconds + 3))" \
+      gst-launch-1.0 -q -e \
+        matroskamux name=mux ! filesink location="${remote_capture}" \
+        v4l2src device="${video_device}" do-timestamp=true ! ${video_caps} ! queue ! mux. \
+        ${audio_mixer} ! audio/x-raw,rate=48000,channels=2 ! queue ! mux. \
+        "${audio_anchor[@]}" \
+        pulsesrc device="${pulse_source}" do-timestamp=true ! audio/x-raw,rate=48000,channels=2 ! \
+          audioconvert ! audioresample ! audio/x-raw,rate=48000,channels=2 ! queue ! amix. &
+  fi
+  local capture_pid=$!
+  sleep "${ready_settle}"
+  printf '%s\n' "${ready_marker}" >&2
+  wait "${capture_pid}"
+}
+
+run_ffmpeg_pulse_capture() {
+  local video_device=$1
+  local pulse_source=$2
+  printf 'capture_start_unix_ns=%s\n' "$(date +%s%N)" >&2
+  timeout --kill-after=5 --signal=INT "$((capture_seconds + 5))" \
+    ffmpeg -nostdin -hide_banner -loglevel error -y \
+      -thread_queue_size 1024 -f video4linux2 -framerate "${fps}" \
+      -video_size "${width}x${height}" -input_format mjpeg -i "${video_device}" \
+      -thread_queue_size 1024 -f pulse -i "${pulse_source}" \
+      -map 0:v:0 -map 1:a:0 -t "${capture_seconds}" \
+      -c:v copy -c:a pcm_s16le "${remote_capture}" </dev/null &
+  local capture_pid=$!
+  sleep "${ready_settle}"
+  printf '%s\n' "${ready_marker}" >&2
+  wait "${capture_pid}"
+}
+
+rm -f "${remote_capture}"
+video_device="$(resolve_video_device)"
+if [[ -z "${video_device}" ]]; then
+  printf 'Lesavka UVC video device not found on RCT host; refusing unrelated capture devices.\n' >&2
+  exit 2
+fi
+if [[ "${width}" == "0" || "${height}" == "0" || "${fps}" == "0" ]]; then
+  if read -r width height fps < <(current_video_profile); then
+    :
+  else
+    printf 'unable to auto-detect current UVC mode; set LESAVKA_CLIENT_RCT_MODE=WIDTHxHEIGHT@FPS\n' >&2
+    exit 2
+  fi
+fi
+printf 'using video device: %s\n' "${video_device}" >&2
+printf 'using video mode: %sx%s @ %s fps (mjpeg)\n' "${width}" "${height}" "${fps}" >&2
+
+case "${capture_stack}" in
+  pulse)
+    pulse_source="$(resolve_pulse_source)"
+    if [[ -z "${pulse_source}" ]]; then
+      printf 'Lesavka Pulse audio source not found; refusing timing-sensitive fallback.\n' >&2
+      exit 2
+    fi
+    printf 'using Pulse source: %s\n' "${pulse_source}" >&2
+    run_preroll "${video_device}" "${preroll_discard}"
+    case "${pulse_tool}" in
+      gst) run_gst_pulse_capture "${video_device}" "${pulse_source}" ;;
+      ffmpeg) run_ffmpeg_pulse_capture "${video_device}" "${pulse_source}" ;;
+      *)
+        printf 'unsupported REMOTE_PULSE_CAPTURE_TOOL=%s for client-to-RCT probe; use gst or ffmpeg\n' "${pulse_tool}" >&2
+        exit 2
+        ;;
+    esac
+    ;;
+  *)
+    printf 'unsupported REMOTE_CAPTURE_STACK=%s for client-to-RCT probe\n' "${capture_stack}" >&2
+    exit 2
+    ;;
+esac
diff --git a/scripts/manual/run_client_to_rct_transport_probe.sh b/scripts/manual/run_client_to_rct_transport_probe.sh
index f483536..c6209fb 100755
--- a/scripts/manual/run_client_to_rct_transport_probe.sh
+++ b/scripts/manual/run_client_to_rct_transport_probe.sh
@@ -14,6 +14,9 @@ SERVER_TUNNEL_REMOTE_PORT=${SERVER_TUNNEL_REMOTE_PORT:-50051}
 SSH_OPTS=${SSH_OPTS:-"-o BatchMode=yes -o ConnectTimeout=5"}
 
 LESAVKA_CLIENT_RCT_MODE=${LESAVKA_CLIENT_RCT_MODE:-auto}
+LESAVKA_CLIENT_RCT_UPSTREAM_MODE=${LESAVKA_CLIENT_RCT_UPSTREAM_MODE:-${LESAVKA_CLIENT_RCT_MODE}}
+LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC=${LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC:-auto}
+LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC=${LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC:-${LESAVKA_UPLINK_AUDIO_CODEC:-opus}}
 REMOTE_CAPTURE_STACK=${REMOTE_CAPTURE_STACK:-pulse}
 REMOTE_PULSE_CAPTURE_TOOL=${REMOTE_PULSE_CAPTURE_TOOL:-gst}
 REMOTE_PULSE_VIDEO_MODE=${REMOTE_PULSE_VIDEO_MODE:-cfr}
@@ -193,169 +196,7 @@ start_tethys_capture() {
     "${REMOTE_CAPTURE_PREROLL_SETTLE_SECONDS}" \
     "${REMOTE_CAPTURE_READY_SETTLE_SECONDS}" \
     "${CAPTURE_READY_MARKER}" \
-    >"${LOCAL_CAPTURE_LOG}" 2>&1 <<'REMOTE_CAPTURE_SCRIPT' &
-set -euo pipefail
-remote_capture=$1
-capture_seconds=$2
-width=$3
-height=$4
-fps=$5
-capture_stack=$6
-pulse_tool=$7
-video_mode=$8
-anchor_silence=$9
-preroll_discard=${10}
-preroll_settle=${11}
-ready_settle=${12}
-ready_marker=${13}
-
-resolve_video_device() {
-  find /dev/v4l/by-id -maxdepth 1 -type l \
-    -name 'usb-Lesavka_Lesavka_Composite*video-index0' | sort | head -n 1
-}
-
-resolve_pulse_source() {
-  pactl list short sources 2>/dev/null \
-    | awk '
-      /alsa_input\..*Lesavka_Lesavka_Composite/ { print $2; found=1; exit }
-      /Lesavka_Lesavka_Composite/ && $2 !~ /\.monitor$/ && !fallback { fallback=$2 }
-      END {
-        if (found) exit 0
-        if (fallback != "") { print fallback; exit 0 }
-        exit 1
-      }
-    '
-}
-
-current_video_profile() {
-  v4l2-ctl -d "${video_device}" --all 2>/dev/null \
-    | awk '
-      /Width\/Height[[:space:]]*:/ {
-        split($0, a, ":")
-        gsub(/^[ \t]+/, "", a[2])
-        split(a[2], wh, "/")
-        width=wh[1]
-        height=wh[2]
-        next
-      }
-      /Frames per second[[:space:]]*:/ {
-        split($0, a, ":")
-        gsub(/^[ \t]+/, "", a[2])
-        split(a[2], fps_parts, "\\.")
-        fps=fps_parts[1]
-      }
-      END {
-        if (width && height && fps) {
-          printf "%s %s %s\n", width, height, fps
-          exit 0
-        }
-        exit 1
-      }
-    '
-}
-
-gst_audio_mixer_element() {
-  if gst-inspect-1.0 audiomixer 2>/dev/null | grep -q 'ignore-inactive-pads'; then
-    printf 'audiomixer name=amix ignore-inactive-pads=true'
-  else
-    printf 'audiomixer name=amix'
-  fi
-}
-
-run_preroll() {
-  local video_device=$1
-  local seconds=$2
-  [[ "${seconds}" =~ ^[0-9]+$ && "${seconds}" -gt 0 ]] || return 0
-  printf 'discarding %ss of post-enumeration capture before probe\n' "${seconds}" >&2
-  timeout --kill-after=5 --signal=INT "$((seconds + 5))" \
-    gst-launch-1.0 -q -e v4l2src device="${video_device}" do-timestamp=true num-buffers="$((fps * seconds))" \
-      ! "image/jpeg,width=${width},height=${height},framerate=${fps}/1" ! fakesink \
-    >/dev/null 2>&1 || true
-  if [[ "${preroll_settle}" =~ ^[0-9]+$ && "${preroll_settle}" -gt 0 ]]; then
-    printf 'settling %ss after preroll discard\n' "${preroll_settle}" >&2
-    sleep "${preroll_settle}"
-  fi
-}
-
-run_gst_pulse_capture() {
-  local video_device=$1
-  local pulse_source=$2
-  local video_caps="image/jpeg,width=${width},height=${height},framerate=${fps}/1"
-  local decode_chain="jpegdec !"
-  local audio_mixer
-  audio_mixer="$(gst_audio_mixer_element)"
-  local audio_anchor=()
-  if [[ "${anchor_silence}" != "0" ]]; then
-    printf 'anchoring Pulse capture audio timeline with generated silence\n' >&2
-    audio_anchor=(audiotestsrc wave=silence is-live=true do-timestamp=true ! "audio/x-raw,rate=48000,channels=2" ! queue ! amix.)
-  fi
-  printf 'capture_start_unix_ns=%s\n' "$(date +%s%N)" >&2
-  if [[ "${video_mode}" == "cfr" ]]; then
-    timeout --kill-after=5 --signal=INT "$((capture_seconds + 3))" \
-      gst-launch-1.0 -q -e \
-        matroskamux name=mux ! filesink location="${remote_capture}" \
-        v4l2src device="${video_device}" do-timestamp=true ! ${video_caps} ! \
-          ${decode_chain} videoconvert ! videorate ! video/x-raw,framerate="${fps}"/1 ! \
-          x264enc tune=zerolatency speed-preset=ultrafast key-int-max=1 bitrate=5000 ! \
-          h264parse ! queue ! mux. \
-        ${audio_mixer} ! audio/x-raw,rate=48000,channels=2 ! queue ! mux. \
-        "${audio_anchor[@]}" \
-        pulsesrc device="${pulse_source}" do-timestamp=true ! audio/x-raw,rate=48000,channels=2 ! \
-          audioconvert ! audioresample ! audio/x-raw,rate=48000,channels=2 ! queue ! amix. &
-  else
-    timeout --kill-after=5 --signal=INT "$((capture_seconds + 3))" \
-      gst-launch-1.0 -q -e \
-        matroskamux name=mux ! filesink location="${remote_capture}" \
-        v4l2src device="${video_device}" do-timestamp=true ! ${video_caps} ! queue ! mux. \
-        ${audio_mixer} ! audio/x-raw,rate=48000,channels=2 ! queue ! mux. \
-        "${audio_anchor[@]}" \
-        pulsesrc device="${pulse_source}" do-timestamp=true ! audio/x-raw,rate=48000,channels=2 ! \
-          audioconvert ! audioresample ! audio/x-raw,rate=48000,channels=2 ! queue ! amix. &
-  fi
-  local capture_pid=$!
-  sleep "${ready_settle}"
-  printf '%s\n' "${ready_marker}" >&2
-  wait "${capture_pid}"
-}
-
-rm -f "${remote_capture}"
-video_device="$(resolve_video_device)"
-if [[ -z "${video_device}" ]]; then
-  printf 'Lesavka UVC video device not found on RCT host; refusing unrelated capture devices.\n' >&2
-  exit 2
-fi
-if [[ "${width}" == "0" || "${height}" == "0" || "${fps}" == "0" ]]; then
-  if read -r width height fps < <(current_video_profile); then
-    :
-  else
-    printf 'unable to auto-detect current UVC mode; set LESAVKA_CLIENT_RCT_MODE=WIDTHxHEIGHT@FPS\n' >&2
-    exit 2
-  fi
-fi
-printf 'using video device: %s\n' "${video_device}" >&2
-printf 'using video mode: %sx%s @ %s fps (mjpeg)\n' "${width}" "${height}" "${fps}" >&2
-
-case "${capture_stack}" in
-  pulse)
-    if [[ "${pulse_tool}" != "gst" ]]; then
-      printf 'unsupported REMOTE_PULSE_CAPTURE_TOOL=%s for client-to-RCT probe; use gst\n' "${pulse_tool}" >&2
-      exit 2
-    fi
-    pulse_source="$(resolve_pulse_source)"
-    if [[ -z "${pulse_source}" ]]; then
-      printf 'Lesavka Pulse audio source not found; refusing timing-sensitive fallback.\n' >&2
-      exit 2
-    fi
-    printf 'using Pulse source: %s\n' "${pulse_source}" >&2
-    run_preroll "${video_device}" "${preroll_discard}"
-    run_gst_pulse_capture "${video_device}" "${pulse_source}"
-    ;;
-  *)
-    printf 'unsupported REMOTE_CAPTURE_STACK=%s for client-to-RCT probe\n' "${capture_stack}" >&2
-    exit 2
-    ;;
-esac
-REMOTE_CAPTURE_SCRIPT
+    >"${LOCAL_CAPTURE_LOG}" 2>&1  <"${SCRIPT_DIR}/client_rct_remote_capture.sh" &
   CAPTURE_PID=$!
 }
 
@@ -377,9 +218,17 @@ wait_for_capture_ready() {
 
 run_client_sync_probe() {
   echo "==> running client-origin bundled transport probe against ${RESOLVED_LESAVKA_SERVER_ADDR}"
+  local camera_args=()
+  if [[ "${LESAVKA_CLIENT_RCT_UPSTREAM_MODE}" != "auto" ]]; then
+    camera_args+=(--camera-mode "${LESAVKA_CLIENT_RCT_UPSTREAM_MODE}")
+  fi
+  if [[ "${LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC}" != "auto" ]]; then
+    camera_args+=(--camera-codec "${LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC}")
+  fi
   (
     cd "${REPO_ROOT}"
     LESAVKA_TLS_DOMAIN="${LESAVKA_TLS_DOMAIN}" \
+      LESAVKA_UPLINK_AUDIO_CODEC="${LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC}" \
       LESAVKA_SYNC_PROBE_SEND_LOG="${LOCAL_CLIENT_SEND_JSONL}" \
       timeout --signal=INT "${PROBE_TIMEOUT_SECONDS}" \
       "${REPO_ROOT}/target/debug/lesavka-sync-probe" \
@@ -390,7 +239,8 @@ run_client_sync_probe() {
         --pulse-width-ms "${PROBE_PULSE_WIDTH_MS}" \
         --marker-tick-period "${PROBE_MARKER_TICK_PERIOD}" \
         --event-width-codes "${PROBE_EVENT_WIDTH_CODES}" \
-        --timeline-json "${LOCAL_CLIENT_TIMELINE_JSON}"
+        --timeline-json "${LOCAL_CLIENT_TIMELINE_JSON}" \
+        "${camera_args[@]}"
   )
 }
 
@@ -457,6 +307,7 @@ read -r MODE_WIDTH MODE_HEIGHT MODE_FPS < <(parse_mode "${LESAVKA_CLIENT_RCT_MOD
 
 echo "==> client-to-RCT bundled transport probe"
 echo "   ↪ mode=${LESAVKA_CLIENT_RCT_MODE}"
+echo "   ↪ upstream_mode=${LESAVKA_CLIENT_RCT_UPSTREAM_MODE} upstream_camera_codec=${LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC} upstream_audio_codec=${LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC}"
 echo "   ↪ capture_stack=${REMOTE_CAPTURE_STACK} pulse_tool=${REMOTE_PULSE_CAPTURE_TOOL} video_mode=${REMOTE_PULSE_VIDEO_MODE}"
 echo "   ↪ server_addr=${LESAVKA_SERVER_ADDR}"
 echo "   ↪ max_client_to_rct_age_ms=${LESAVKA_CLIENT_RCT_MAX_AGE_MS}"
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 87f60b1..2d4b87e 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -10,7 +10,7 @@ bench                   = false
 
 [package]
 name                    = "lesavka_server"
-version                 = "0.22.18"
+version                 = "0.22.19"
 edition                 = "2024"
 autobins                = false
 
diff --git a/server/src/bin/lesavka-uvc.real.inc b/server/src/bin/lesavka-uvc.real.inc
index 0c90348..a3715f4 100644
--- a/server/src/bin/lesavka-uvc.real.inc
+++ b/server/src/bin/lesavka-uvc.real.inc
@@ -1270,9 +1270,12 @@ fn sanitize_streaming_control(data: &[u8], state: &UvcState) -> [u8; STREAM_CTRL
         if format_index == 1 {
             out[2] = 1;
         }
-        if frame_index == 1 {
-            out[3] = 1;
-        }
+        let frame_index = uvc_frame_index_for_request(frame_index, &state.cfg);
+        out[3] = frame_index;
+        write_le32(
+            &mut out[18..22],
+            uvc_frame_size_for_index(frame_index, state.cfg.frame_size),
+        );
         if interval != 0 {
             write_le32(&mut out[4..8], interval);
         }
@@ -1320,7 +1323,7 @@ fn build_streaming_control(cfg: &UvcConfig, ctrl_len: usize) -> [u8; STREAM_CTRL
 
     write_le16(&mut buf[0..2], 1); // bmHint: dwFrameInterval
     buf[2] = 1; // bFormatIndex
-    buf[3] = 1; // bFrameIndex
+    buf[3] = uvc_frame_index_for_mode(cfg.width, cfg.height); // bFrameIndex
     write_le32(&mut buf[4..8], cfg.interval);
     write_le16(&mut buf[8..10], 0);
     write_le16(&mut buf[10..12], 0);
@@ -1340,6 +1343,29 @@ fn build_streaming_control(cfg: &UvcConfig, ctrl_len: usize) -> [u8; STREAM_CTRL
     buf
 }
 
+fn uvc_frame_index_for_mode(width: u32, height: u32) -> u8 {
+    match (width, height) {
+        (1920, 1080) => 1,
+        (1280, 720) => 2,
+        _ => 2,
+    }
+}
+
+fn uvc_frame_index_for_request(requested: u8, cfg: &UvcConfig) -> u8 {
+    match requested {
+        1 | 2 => requested,
+        _ => uvc_frame_index_for_mode(cfg.width, cfg.height),
+    }
+}
+
+fn uvc_frame_size_for_index(frame_index: u8, fallback: u32) -> u32 {
+    match frame_index {
+        1 => 1920 * 1080 * 2,
+        2 => 1280 * 720 * 2,
+        _ => fallback,
+    }
+}
+
 fn event_bytes(ev: &V4l2Event) -> [u8; 64] {
     unsafe { ev.u.data }
 }
@@ -1404,19 +1430,14 @@ fn read_u32_first(path: &str) -> Option<u32> {
 }
 
 fn read_configfs_snapshot() -> Option<ConfigfsSnapshot> {
-    let width = read_u32_file(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/wWidth"
-    ))?;
-    let height = read_u32_file(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/wHeight"
-    ))?;
+    let frame = configfs_frame_name_from_env();
+    let frame_root = format!("{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/{frame}");
+    let width = read_u32_file(&format!("{frame_root}/wWidth"))?;
+    let height = read_u32_file(&format!("{frame_root}/wHeight"))?;
     let default_interval = read_u32_file(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/dwDefaultFrameInterval"
+        "{frame_root}/dwDefaultFrameInterval"
     ))?;
-    let frame_interval = read_u32_first(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/dwFrameInterval"
-    ))
-    .unwrap_or(0);
+    let frame_interval = read_u32_first(&format!("{frame_root}/dwFrameInterval")).unwrap_or(0);
     let maxpacket = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming_maxpacket"))?;
     let maxburst = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming_maxburst")).unwrap_or(0);
     Some(ConfigfsSnapshot {
@@ -1429,6 +1450,16 @@ fn read_configfs_snapshot() -> Option<ConfigfsSnapshot> {
     })
 }
 
+fn configfs_frame_name_from_env() -> &'static str {
+    match (
+        env_u32("LESAVKA_UVC_WIDTH", 1280),
+        env_u32("LESAVKA_UVC_HEIGHT", 720),
+    ) {
+        (1920, 1080) => "1080p",
+        _ => "720p",
+    }
+}
+
 fn log_configfs_snapshot(state: &mut UvcState, label: &str) {
     let Some(current) = read_configfs_snapshot() else {
         eprintln!("[lesavka-uvc] configfs {label}: unavailable");
diff --git a/server/src/bin/lesavka_uvc/control_payloads.rs b/server/src/bin/lesavka_uvc/control_payloads.rs
index 3d62f98..3d4343f 100644
--- a/server/src/bin/lesavka_uvc/control_payloads.rs
+++ b/server/src/bin/lesavka_uvc/control_payloads.rs
@@ -15,7 +15,7 @@ fn build_streaming_control(cfg: &UvcConfig, ctrl_len: usize) -> [u8; STREAM_CTRL
 
     write_le16(&mut buf[0..2], 1);
     buf[2] = 1;
-    buf[3] = 1;
+    buf[3] = uvc_frame_index_for_mode(cfg.width, cfg.height);
     write_le32(&mut buf[4..8], cfg.interval);
     write_le16(&mut buf[8..10], 0);
     write_le16(&mut buf[10..12], 0);
@@ -35,6 +35,29 @@ fn build_streaming_control(cfg: &UvcConfig, ctrl_len: usize) -> [u8; STREAM_CTRL
     buf
 }
 
+fn uvc_frame_index_for_mode(width: u32, height: u32) -> u8 {
+    match (width, height) {
+        (1920, 1080) => 1,
+        (1280, 720) => 2,
+        _ => 2,
+    }
+}
+
+fn uvc_frame_index_for_request(requested: u8, cfg: &UvcConfig) -> u8 {
+    match requested {
+        1 | 2 => requested,
+        _ => uvc_frame_index_for_mode(cfg.width, cfg.height),
+    }
+}
+
+fn uvc_frame_size_for_index(frame_index: u8, fallback: u32) -> u32 {
+    match frame_index {
+        1 => 1920 * 1080 * 2,
+        2 => 1280 * 720 * 2,
+        _ => fallback,
+    }
+}
+
 #[cfg(coverage)]
 fn parse_ctrl_request(data: [u8; 64]) -> UsbCtrlRequest {
     UsbCtrlRequest {
diff --git a/server/src/bin/lesavka_uvc/control_requests.rs b/server/src/bin/lesavka_uvc/control_requests.rs
index c34cb9b..0000709 100644
--- a/server/src/bin/lesavka_uvc/control_requests.rs
+++ b/server/src/bin/lesavka_uvc/control_requests.rs
@@ -146,9 +146,12 @@ fn sanitize_streaming_control(data: &[u8], state: &UvcState) -> [u8; STREAM_CTRL
         if data[2] == 1 {
             out[2] = 1;
         }
-        if data[3] == 1 {
-            out[3] = 1;
-        }
+        let frame_index = uvc_frame_index_for_request(data[3], &state.cfg);
+        out[3] = frame_index;
+        write_le32(
+            &mut out[18..22],
+            uvc_frame_size_for_index(frame_index, state.cfg.frame_size),
+        );
         let interval = read_le32(data, 4);
         if interval != 0 {
             write_le32(&mut out[4..8], interval);
diff --git a/server/src/camera/selection.rs b/server/src/camera/selection.rs
index 0c0d4bc..dda7b61 100644
--- a/server/src/camera/selection.rs
+++ b/server/src/camera/selection.rs
@@ -225,8 +225,20 @@ fn select_uvc_config() -> CameraConfig {
         .unwrap_or(30);
     let codec = select_uvc_codec(Some(&uvc_env));
 
-    if let Some(live) = read_live_uvc_configfs_profile() {
-        if (width, height, fps) != (live.width, live.height, live.fps) {
+    let live_profiles = read_live_uvc_configfs_profiles();
+    if !live_profiles.is_empty() {
+        if live_profiles
+            .iter()
+            .any(|live| (width, height, fps) == (live.width, live.height, live.fps))
+        {
+            info!(
+                configured_width = width,
+                configured_height = height,
+                configured_fps = fps,
+                "📷 configured UVC profile is advertised by the live gadget descriptor"
+            );
+        } else {
+            let live = live_profiles[0];
             warn!(
                 configured_width = width,
                 configured_height = height,
@@ -237,10 +249,10 @@ fn select_uvc_config() -> CameraConfig {
                 live_interval_100ns = live.interval_100ns,
                 "📷 live UVC descriptor differs from configured profile; honoring attached gadget profile until rebuild"
             );
+            width = live.width;
+            height = live.height;
+            fps = live.fps.max(1);
         }
-        width = live.width;
-        height = live.height;
-        fps = live.fps.max(1);
     }
 
     CameraConfig {
@@ -256,45 +268,45 @@ fn select_uvc_config() -> CameraConfig {
 #[cfg(not(coverage))]
 /// Keeps `read_live_uvc_configfs_profile` explicit because it sits on camera selection, where negotiated profiles must match the server output contract.
 /// Inputs are the typed parameters; output is the return value or side effect.
-fn read_live_uvc_configfs_profile() -> Option<LiveUvcProfile> {
+fn read_live_uvc_configfs_profiles() -> Vec<LiveUvcProfile> {
     let base = std::env::var(UVC_CONFIGFS_BASE_ENV)
         .map(PathBuf::from)
         .unwrap_or_else(|_| PathBuf::from(DEFAULT_UVC_CONFIGFS_BASE));
-    let frame_dir = live_uvc_frame_dir(&base)?;
-    let width = read_u32_file(frame_dir.join("wWidth"))?;
-    let height = read_u32_file(frame_dir.join("wHeight"))?;
-    let interval_100ns = read_u32_file(frame_dir.join("dwDefaultFrameInterval"))
-        .or_else(|| read_first_u32_line(frame_dir.join("dwFrameInterval")))?;
-    if width == 0 || height == 0 || interval_100ns == 0 {
-        return None;
-    }
-    Some(LiveUvcProfile {
-        width,
-        height,
-        fps: (10_000_000 / interval_100ns).max(1),
-        interval_100ns,
-    })
-}
-
-#[cfg(not(coverage))]
-/// Keeps `live_uvc_frame_dir` explicit because it sits on camera selection, where negotiated profiles must match the server output contract.
-/// Inputs are the typed parameters; output is the return value or side effect.
-fn live_uvc_frame_dir(base: &Path) -> Option<PathBuf> {
-    let preferred = base.join("streaming/mjpeg/m/720p");
-    if preferred.join("wWidth").is_file() && preferred.join("wHeight").is_file() {
-        return Some(preferred);
-    }
-
     let mjpeg_dir = base.join("streaming/mjpeg/m");
-    let mut candidates = Vec::new();
-    for entry in fs::read_dir(mjpeg_dir).ok()?.flatten() {
+    let Ok(entries) = fs::read_dir(mjpeg_dir) else {
+        return Vec::new();
+    };
+    let mut profiles = Vec::new();
+    for entry in entries.flatten() {
         let path = entry.path();
-        if path.join("wWidth").is_file() && path.join("wHeight").is_file() {
-            candidates.push(path);
+        let Some(width) = read_u32_file(path.join("wWidth")) else {
+            continue;
+        };
+        let Some(height) = read_u32_file(path.join("wHeight")) else {
+            continue;
+        };
+        if width == 0 || height == 0 {
+            continue;
+        }
+        let intervals = read_u32_lines(path.join("dwFrameInterval"))
+            .or_else(|| read_u32_file(path.join("dwDefaultFrameInterval")).map(|v| vec![v]))
+            .unwrap_or_default();
+        for interval_100ns in intervals.into_iter().filter(|interval| *interval > 0) {
+            profiles.push(LiveUvcProfile {
+                width,
+                height,
+                fps: (10_000_000 / interval_100ns).max(1),
+                interval_100ns,
+            });
         }
     }
-    candidates.sort();
-    candidates.into_iter().next()
+    profiles.sort_by_key(|p| {
+        (
+            std::cmp::Reverse(p.width * p.height),
+            std::cmp::Reverse(p.fps),
+        )
+    });
+    profiles
 }
 
 #[cfg(not(coverage))]
@@ -305,11 +317,13 @@ fn read_u32_file(path: impl AsRef<Path>) -> Option<u32> {
 }
 
 #[cfg(not(coverage))]
-fn read_first_u32_line(path: impl AsRef<Path>) -> Option<u32> {
-    fs::read_to_string(path)
+fn read_u32_lines(path: impl AsRef<Path>) -> Option<Vec<u32>> {
+    let values = fs::read_to_string(path)
         .ok()?
         .lines()
-        .find_map(|line| line.trim().parse::<u32>().ok())
+        .filter_map(|line| line.trim().parse::<u32>().ok())
+        .collect::<Vec<_>>();
+    (!values.is_empty()).then_some(values)
 }
 
 #[cfg(coverage)]
diff --git a/server/src/uvc_control/model.rs b/server/src/uvc_control/model.rs
index d3307be..616055b 100644
--- a/server/src/uvc_control/model.rs
+++ b/server/src/uvc_control/model.rs
@@ -249,15 +249,14 @@ pub(crate) fn read_u32_first(path: &str) -> Option<u32> {
 }
 
 pub(crate) fn read_configfs_snapshot() -> Option<ConfigfsSnapshot> {
-    let width = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/wWidth"))?;
-    let height = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/wHeight"))?;
+    let frame = configfs_frame_name_from_env();
+    let frame_root = format!("{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/{frame}");
+    let width = read_u32_file(&format!("{frame_root}/wWidth"))?;
+    let height = read_u32_file(&format!("{frame_root}/wHeight"))?;
     let default_interval = read_u32_file(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/dwDefaultFrameInterval"
+        "{frame_root}/dwDefaultFrameInterval"
     ))?;
-    let frame_interval = read_u32_first(&format!(
-        "{CONFIGFS_UVC_BASE}/streaming/mjpeg/m/720p/dwFrameInterval"
-    ))
-    .unwrap_or(0);
+    let frame_interval = read_u32_first(&format!("{frame_root}/dwFrameInterval")).unwrap_or(0);
     let maxpacket = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming_maxpacket"))?;
     let maxburst = read_u32_file(&format!("{CONFIGFS_UVC_BASE}/streaming_maxburst")).unwrap_or(0);
     Some(ConfigfsSnapshot {
@@ -270,6 +269,16 @@ pub(crate) fn read_configfs_snapshot() -> Option<ConfigfsSnapshot> {
     })
 }
 
+fn configfs_frame_name_from_env() -> &'static str {
+    match (
+        env_u32("LESAVKA_UVC_WIDTH", 1280),
+        env_u32("LESAVKA_UVC_HEIGHT", 720),
+    ) {
+        (1920, 1080) => "1080p",
+        _ => "720p",
+    }
+}
+
 pub(crate) fn log_configfs_snapshot(state: &mut UvcState, label: &str) {
     let Some(current) = read_configfs_snapshot() else {
         eprintln!("[lesavka-uvc] configfs {label}: unavailable");
@@ -331,7 +340,7 @@ pub(crate) fn build_streaming_control(
 
     write_le16(&mut buf[0..2], 1);
     buf[2] = 1;
-    buf[3] = 1;
+    buf[3] = uvc_frame_index_for_mode(cfg.width, cfg.height);
     write_le32(&mut buf[4..8], cfg.interval);
     write_le16(&mut buf[8..10], 0);
     write_le16(&mut buf[10..12], 0);
@@ -351,6 +360,29 @@ pub(crate) fn build_streaming_control(
     buf
 }
 
+pub(crate) fn uvc_frame_index_for_mode(width: u32, height: u32) -> u8 {
+    match (width, height) {
+        (1920, 1080) => 1,
+        (1280, 720) => 2,
+        _ => 2,
+    }
+}
+
+pub(crate) fn uvc_frame_index_for_request(requested: u8, cfg: &UvcConfig) -> u8 {
+    match requested {
+        1 | 2 => requested,
+        _ => uvc_frame_index_for_mode(cfg.width, cfg.height),
+    }
+}
+
+pub(crate) fn uvc_frame_size_for_index(frame_index: u8, fallback: u32) -> u32 {
+    match frame_index {
+        1 => 1920 * 1080 * 2,
+        2 => 1280 * 720 * 2,
+        _ => fallback,
+    }
+}
+
 pub(crate) fn compute_payload_cap(bulk: bool) -> Option<PayloadCap> {
     if let Some(limit) = env_u32_opt("LESAVKA_UVC_MAXPAYLOAD_LIMIT") {
         return Some(PayloadCap {
diff --git a/server/src/uvc_control/protocol.rs b/server/src/uvc_control/protocol.rs
index e833da6..52055ee 100644
--- a/server/src/uvc_control/protocol.rs
+++ b/server/src/uvc_control/protocol.rs
@@ -6,6 +6,7 @@ use crate::uvc_control::model::{
     UVC_GET_RES, UVC_SET_CUR, UVC_VC_REQUEST_ERROR_CODE_CONTROL, UVC_VS_COMMIT_CONTROL,
     UVC_VS_PROBE_CONTROL, USB_DIR_IN, UvcInterfaces, UvcRequestData, UvcState,
     adjust_length, build_streaming_control, log_configfs_snapshot, read_le32, write_le32,
+    uvc_frame_index_for_request, uvc_frame_size_for_index,
 };
 
 pub(crate) fn handle_setup(
@@ -278,9 +279,12 @@ pub(crate) fn sanitize_streaming_control(
         if format_index == 1 {
             out[2] = 1;
         }
-        if frame_index == 1 {
-            out[3] = 1;
-        }
+        let frame_index = uvc_frame_index_for_request(frame_index, &state.cfg);
+        out[3] = frame_index;
+        write_le32(
+            &mut out[18..22],
+            uvc_frame_size_for_index(frame_index, state.cfg.frame_size),
+        );
         if interval != 0 {
             write_le32(&mut out[4..8], interval);
         }
diff --git a/tests/contract/scripts/daemon/server_core_script_contract.rs b/tests/contract/scripts/daemon/server_core_script_contract.rs
index 461c2bb..7cdebef 100644
--- a/tests/contract/scripts/daemon/server_core_script_contract.rs
+++ b/tests/contract/scripts/daemon/server_core_script_contract.rs
@@ -96,7 +96,10 @@ fn core_script_keeps_uvc_output_on_supported_mjpeg_descriptor() {
         "UVC_CODEC=${LESAVKA_UVC_CODEC:-mjpeg}",
         "UVC codec '$UVC_CODEC' is not supported by the MJPEG UVC helper; using mjpeg",
         "UVC_CODEC=mjpeg",
-        "streaming/mjpeg/m/720p",
+        "write_mjpeg_frame_descriptor 1080p 1920 1080",
+        "write_mjpeg_frame_descriptor 720p 1280 720",
+        "UVC_INTERVAL_30=${LESAVKA_UVC_INTERVAL_30:-333333}",
+        "UVC_INTERVAL_20=${LESAVKA_UVC_INTERVAL_20:-500000}",
     ] {
         assert!(
             CORE_SCRIPT.contains(expected),
diff --git a/tests/contract/server/uvc/server_uvc_binary_contract.rs b/tests/contract/server/uvc/server_uvc_binary_contract.rs
index bb268c7..9d9b340 100644
--- a/tests/contract/server/uvc/server_uvc_binary_contract.rs
+++ b/tests/contract/server/uvc/server_uvc_binary_contract.rs
@@ -119,7 +119,7 @@ mod uvc_binary {
         maybe_update_ctrl_len(&mut state, STREAM_CTRL_SIZE_11 as u16, false);
         assert_eq!(state.ctrl_len, STREAM_CTRL_SIZE_11);
         assert_eq!(state.probe[2], 1);
-        assert_eq!(state.commit[3], 1);
+        assert_eq!(state.commit[3], 2);
     }
 
     #[test]
@@ -134,6 +134,7 @@ mod uvc_binary {
         assert_eq!(out[2], 1);
         assert_eq!(out[3], 1);
         assert_eq!(read_le32(&out, 4), 333_333);
+        assert_eq!(read_le32(&out, 18), 1920 * 1080 * 2);
         assert_eq!(read_le32(&out, 22), state.cfg.max_packet);
     }
 
diff --git a/tests/contract/server/uvc/server_uvc_binary_extra_contract.rs b/tests/contract/server/uvc/server_uvc_binary_extra_contract.rs
index 4630edc..86cffb1 100644
--- a/tests/contract/server/uvc/server_uvc_binary_extra_contract.rs
+++ b/tests/contract/server/uvc/server_uvc_binary_extra_contract.rs
@@ -250,6 +250,7 @@ mod uvc_binary_extra {
         assert_eq!(out[2], 1);
         assert_eq!(out[3], 1);
         assert_eq!(read_le32(&out, 4), 333_333);
+        assert_eq!(read_le32(&out, 18), 1920 * 1080 * 2);
         assert_eq!(read_le32(&out, 22), state.cfg.max_packet);
     }
 
diff --git a/tests/installer/scripts/install/server_install_script_contract.rs b/tests/installer/scripts/install/server_install_script_contract.rs
index b91f871..fa5d8b2 100644
--- a/tests/installer/scripts/install/server_install_script_contract.rs
+++ b/tests/installer/scripts/install/server_install_script_contract.rs
@@ -347,6 +347,12 @@ fn server_install_pins_hdmi_camera_and_display_defaults() {
         SERVER_INSTALL.contains("dwDefaultFrameInterval"),
         "live descriptor matching should include frame interval, not only codec labels"
     );
+    assert!(
+        SERVER_INSTALL.contains("1920x1080) frame_root=\"$function_root/streaming/mjpeg/m/1080p\"")
+            && SERVER_INSTALL.contains("1280x720) frame_root=\"$function_root/streaming/mjpeg/m/720p\"")
+            && SERVER_INSTALL.contains("grep -qx \"${LESAVKA_UVC_INTERVAL:-333333}\" \"$frame_root/dwFrameInterval\""),
+        "live descriptor matching should recognize all supported MJPEG UVC profiles instead of collapsing to one 720p frame"
+    );
     assert!(
         SERVER_INSTALL.contains("streaming/header/h/mjpeg")
             && SERVER_INSTALL.contains("streaming/header/h/yuyv"),
diff --git a/tests/manual/client/sync_probe/client_rct_transport_probe_contract.rs b/tests/manual/client/sync_probe/client_rct_transport_probe_contract.rs
index 9b4159b..da33b5f 100644
--- a/tests/manual/client/sync_probe/client_rct_transport_probe_contract.rs
+++ b/tests/manual/client/sync_probe/client_rct_transport_probe_contract.rs
@@ -14,6 +14,10 @@ const CLIENT_RCT_SCRIPT: &str = include_str!(concat!(
     env!("CARGO_MANIFEST_DIR"),
     "/scripts/manual/run_client_to_rct_transport_probe.sh"
 ));
+const CLIENT_RCT_REMOTE_CAPTURE: &str = include_str!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/scripts/manual/client_rct_remote_capture.sh"
+));
 const CLIENT_RCT_SUMMARY: &str = include_str!(concat!(
     env!("CARGO_MANIFEST_DIR"),
     "/scripts/manual/client_rct_transport_summary.py"
@@ -116,7 +120,8 @@ fn client_rct_probe_preserves_black_box_rct_measurement_artifacts() {
                 || CLIENT_RCT_SUMMARY.contains(expected)
                 || CLIENT_RCT_LAYERS.contains(expected)
                 || UVC_FRAME_META_FETCH.contains(expected)
-                || UVC_FRAME_META_SUMMARY.contains(expected),
+                || UVC_FRAME_META_SUMMARY.contains(expected)
+                || CLIENT_RCT_REMOTE_CAPTURE.contains(expected),
             "client-to-RCT probe should preserve artifact/summary marker {expected}"
         );
     }
@@ -126,6 +131,7 @@ fn client_rct_probe_preserves_black_box_rct_measurement_artifacts() {
 fn client_rct_probe_keeps_shell_harness_focused_under_loc_limit() {
     for (name, contents) in [
         ("run_client_to_rct_transport_probe.sh", CLIENT_RCT_SCRIPT),
+        ("client_rct_remote_capture.sh", CLIENT_RCT_REMOTE_CAPTURE),
         ("client_rct_uvc_frame_meta_fetch.sh", UVC_FRAME_META_FETCH),
         ("client_rct_transport_summary.py", CLIENT_RCT_SUMMARY),
     ] {
@@ -144,6 +150,11 @@ fn client_rct_probe_is_non_mutating_and_passwordless_by_default() {
         "no remote sudo/reconfigure will be attempted by this script",
         "LESAVKA_SERVER_ADDR=${LESAVKA_SERVER_ADDR:-auto}",
         "LESAVKA_CLIENT_RCT_MODE=${LESAVKA_CLIENT_RCT_MODE:-auto}",
+        "LESAVKA_CLIENT_RCT_UPSTREAM_MODE=${LESAVKA_CLIENT_RCT_UPSTREAM_MODE:-${LESAVKA_CLIENT_RCT_MODE}}",
+        "LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC=${LESAVKA_CLIENT_RCT_UPSTREAM_CAMERA_CODEC:-auto}",
+        "LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC=${LESAVKA_CLIENT_RCT_UPSTREAM_AUDIO_CODEC:-${LESAVKA_UPLINK_AUDIO_CODEC:-opus}}",
+        "--camera-mode",
+        "--camera-codec",
         "LESAVKA_CLIENT_RCT_START_DELAY_SECONDS=${LESAVKA_CLIENT_RCT_START_DELAY_SECONDS:-0}",
         "LESAVKA_CLIENT_RCT_START_DELAY_SECONDS must be a non-negative number",
         "start_delay=${LESAVKA_CLIENT_RCT_START_DELAY_SECONDS}s",
@@ -154,7 +165,7 @@ fn client_rct_probe_is_non_mutating_and_passwordless_by_default() {
         "127.0.0.1:${local_port}:127.0.0.1:${SERVER_TUNNEL_REMOTE_PORT}",
     ] {
         assert!(
-            CLIENT_RCT_SCRIPT.contains(expected),
+            CLIENT_RCT_SCRIPT.contains(expected) || CLIENT_RCT_REMOTE_CAPTURE.contains(expected),
             "client-to-RCT probe should keep unattended marker {expected}"
         );
     }