test(sync): auto-select theia host capture mode

scripts/manual/run_upstream_av_sync.sh

@@ -18,13 +18,14 @@ TAIL_SECONDS=${TAIL_SECONDS:-2}
 CAPTURE_SECONDS=${CAPTURE_SECONDS:-$((PROBE_DURATION_SECONDS + PROBE_WARMUP_SECONDS + LEAD_IN_SECONDS + TAIL_SECONDS))}
 REMOTE_CAPTURE=${REMOTE_CAPTURE:-/tmp/lesavka-upstream-av-sync.mkv}
 LOCAL_OUTPUT_DIR=${LOCAL_OUTPUT_DIR:-"${REPO_ROOT}/tmp"}
-VIDEO_SIZE=${VIDEO_SIZE:-1280x720}
+VIDEO_SIZE=${VIDEO_SIZE:-auto}
 VIDEO_FPS=${VIDEO_FPS:-30}
 VIDEO_FORMAT=${VIDEO_FORMAT:-mjpeg}
 REMOTE_CAPTURE_STACK=${REMOTE_CAPTURE_STACK:-auto}
 REMOTE_AUDIO_SOURCE=${REMOTE_AUDIO_SOURCE:-auto}
 REMOTE_AUDIO_QUIESCE_USER_AUDIO=${REMOTE_AUDIO_QUIESCE_USER_AUDIO:-auto}
 ANALYSIS_NORMALIZE=${ANALYSIS_NORMALIZE:-1}
+ANALYSIS_SCALE_WIDTH=${ANALYSIS_SCALE_WIDTH:-1280}
 SSH_OPTS=${SSH_OPTS:-"-o BatchMode=yes -o ConnectTimeout=5"}
 LOCAL_AUDIO_SANITY=${LOCAL_AUDIO_SANITY:-1}
 PROBE_PREBUILD=${PROBE_PREBUILD:-1}
@@ -78,10 +79,6 @@ remote_audio_source=$7
 remote_audio_quiesce_user_audio=$8
 
 rm -f "${remote_capture}"
-video_args=(-f video4linux2 -framerate "${video_fps}" -video_size "${video_size}")
-if [[ -n "${video_format}" ]]; then
-  video_args+=(-input_format "${video_format}")
-fi
 
 restore_user_audio() {
   systemctl --user start pipewire.socket pipewire-pulse.socket wireplumber.service >/dev/null 2>&1 || true
@@ -111,11 +108,33 @@ resolve_pulse_source() {
     '
 }
 
+resolve_video_size() {
+  local requested=$1
+  if [[ "${requested}" != "auto" ]]; then
+    printf '%s\n' "${requested}"
+    return 0
+  fi
+  if ! command -v v4l2-ctl >/dev/null 2>&1; then
+    printf '1280x720\n'
+    return 0
+  fi
+  local listing
+  listing="$(v4l2-ctl -d /dev/video0 --list-formats-ext 2>/dev/null || true)"
+  local preferred
+  for preferred in 1920x1080 1360x768 1280x720; do
+    if grep -q "Size: Discrete ${preferred}" <<<"${listing}"; then
+      printf '%s\n' "${preferred}"
+      return 0
+    fi
+  done
+  printf '1280x720\n'
+}
+
 resolve_pw_audio_target() {
   if ! command -v pw-dump >/dev/null 2>&1 || ! command -v python3 >/dev/null 2>&1; then
     return 1
   fi
-  pw-dump | python3 - <<'PY'
+  pw-dump | python3 -c '
 import json
 import sys
 
@@ -140,7 +159,7 @@ for obj in objs:
         raise SystemExit(0)
 
 raise SystemExit(1)
-PY
+'
 }
 
 capture_mode="alsa"
@@ -208,13 +227,20 @@ case "${remote_capture_stack}" in
     ;;
 esac
 
+resolved_video_size="$(resolve_video_size "${video_size}")"
+printf 'using video mode: %s (%s)\n' "${resolved_video_size}" "${video_format:-driver-default}" >&2
+video_args=(-f video4linux2 -framerate "${video_fps}" -video_size "${resolved_video_size}")
+if [[ -n "${video_format}" ]]; then
+  video_args+=(-input_format "${video_format}")
+fi
+
 quiesce_for_alsa=0
 case "${remote_audio_quiesce_user_audio}" in
   1|true|yes)
     quiesce_for_alsa=1
     ;;
   auto)
-    if [[ "${audio_mode}" == "alsa" ]]; then
+    if [[ "${capture_mode}" == "alsa" ]]; then
       quiesce_for_alsa=1
     fi
     ;;
@@ -305,14 +331,16 @@ if ssh ${SSH_OPTS} "${TETHYS_HOST}" "test -f '${REMOTE_CAPTURE}'"; then
     ssh ${SSH_OPTS} "${TETHYS_HOST}" bash -s -- \
       "${REMOTE_CAPTURE}" \
       "${remote_fetch_capture}" \
-      "${VIDEO_FPS}" <<'REMOTE_NORMALIZE_SCRIPT' || normalize_status=$?
+      "${VIDEO_FPS}" \
+      "${ANALYSIS_SCALE_WIDTH}" <<'REMOTE_NORMALIZE_SCRIPT' || normalize_status=$?
 set -euo pipefail
 src=$1
 dst=$2
 fps=$3
+scale_width=$4
 ffmpeg -hide_banner -loglevel error -y \
   -i "${src}" \
-  -vf "fps=${fps}" \
+  -vf "fps=${fps},scale='min(${scale_width},iw)':-2" \
   -c:v libx264 -preset ultrafast -crf 12 -g 1 -pix_fmt yuv420p \
   -c:a pcm_s16le \
   "${dst}"