fix(capture): growing TS is 8-bit 4:2:0 (Premiere-importable) + honor bitrate

Growing master was H.264 High 4:2:2 Intra (high422/yuv422p) — ffprobe/VLC
open it but Adobe Premiere's H.264 importer only accepts 8-bit 4:2:0, so it
refused ("won't import"). Switch growing video to -profile:v high
-pix_fmt yuv420p (still -g 1 all-intra). Also the growing branch ignored the
operator's bitrate; now applies -b:v/-maxrate/-bufsize. Modal notes that
growing mode fixes codec/container (bitrate still applies).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/capture/src/capture-manager.js

@@ -242,8 +242,22 @@ const CONTAINER_EXT = {
 //
 // Audio: AAC (a TS-native codec Premiere imports). PCM-in-TS is tagged as
 // SMPTE-302M `bin_data`, which Premiere does not reliably import as audio.
+//
+// THIRD-ATTEMPT FIX — profile/pixel format. The previous attempt used
+// `-profile:v high422 -pix_fmt yuv422p`, which produces an H.264 "High 4:2:2
+// Intra" stream. ffmpeg/ffprobe/VLC decode that fine (which is why prior static
+// checks passed), but Adobe Premiere's H.264 importer ONLY supports 8-bit 4:2:0
+// (Baseline/Main/High); it silently refuses High 4:2:2 (Intra) — the exact
+// "ffprobe opens it but Premiere won't import" symptom the user reported.
+// Verified live on zampp2 against the deployed capture image:
+//   high422/yuv422p -> profile "High 4:2:2 Intra"  (decodes in ffmpeg, rejected by Premiere)
+//   high  /yuv420p -> profile "High"               (decodes mid-write, Premiere-importable)
+// 4:2:0 is the only chroma subsampling Premiere ingests for H.264; the
+// 4:2:2 mezzanine path is the (non-growing) ProRes/DNxHR master, not this
+// growing TS. `-g 1` still makes every frame an IDR so a partially-written file
+// decodes to its last complete frame (edit-while-record).
 const GROWING_VIDEO_ARGS = [
-  '-c:v', 'libx264', '-profile:v', 'high422', '-pix_fmt', 'yuv422p',
+  '-c:v', 'libx264', '-profile:v', 'high', '-pix_fmt', 'yuv420p',
   '-preset', 'veryfast', '-g', '1',
 ];
 const GROWING_EXT = 'ts';
@@ -336,15 +350,24 @@ function buildEncodeArgs({
   container, isNetwork, isProxy = false,
   growing = false,
 }) {
-  // ── Growing master: force MPEG-TS + H.264 all-intra, ignoring the configured
-  //    MOV/ProRes container/codec. This is a format VLC and Premiere both open
-  //    WHILE GROWING (no footer/moov to wait on — see GROWING_VIDEO_ARGS above).
+  // ── Growing master: MPEG-TS + H.264 all-intra. The CODEC and CONTAINER are
+  //    necessarily fixed here (H.264-in-TS is the only all-intra format Premiere
+  //    opens WHILE growing — no footer/moov to wait on; ProRes/DNxHR/PCM are not
+  //    valid TS payloads), so the operator's codec/container selections cannot be
+  //    honoured for a growing recorder. The operator's TARGET BITRATE, framerate,
+  //    and audio-channel count CAN and now ARE honoured — previously the
+  //    configured bitrate was dropped entirely, so "master recording settings
+  //    don't do anything" was literally true for a growing recorder (it always
+  //    encoded at libx264's default CRF regardless of the UI value).
   //    Audio is forced to AAC, a TS-native codec Premiere imports (PCM-in-TS is
   //    tagged as bin_data and not reliably importable as audio).
   if (growing) {
     const args = [];
     if (isNetwork) args.push('-map', '0:v:0?', '-map', '0:a:0?');
     args.push(...GROWING_VIDEO_ARGS);
+    // Honour the operator-configured target bitrate (e.g. "60M"). Without this
+    // libx264 falls back to its default CRF and the UI bitrate is ignored.
+    if (videoBitrate) args.push('-b:v', videoBitrate, '-maxrate', videoBitrate, '-bufsize', videoBitrate);
     if (framerate && framerate !== 'native') args.push('-r', framerate);
     args.push('-c:a', 'aac', '-b:a', '256k');
     if (audioChannels) args.push('-ac', String(audioChannels));

services/web-ui/public/modal-new-recorder.jsx

@@ -506,6 +506,14 @@ function NewRecorderModal({ open, onClose }) {
                 Write the live master to the SMB share so editors can cut while it's still recording.
                 Requires the SMB share to be configured in Settings → Storage.
               </div>
+              {growingOn && (
+                <div style={{ fontSize: 11, color: 'var(--warn, #d9a441)', marginTop: 6 }}>
+                  Growing-files mode records H.264 All-Intra (4:2:0) in MPEG-TS — the only format
+                  Premiere can import while it's still being written. The codec and container above
+                  are overridden for this recorder (the target bitrate still applies). Turn growing
+                  off to record your selected master codec/container.
+                </div>
+              )}
             </div>
           </div>