fixup ffmpeg commands with docker image

server/index.js

@@ -359,6 +359,11 @@ function createPlayback(session) {
   let started = false;
   let closed = false;
   let readyTimer = null;
+  const stderrTailLogger = createLineLogger((line) => {
+    if (!shouldSuppressFfmpegLogLine(line)) {
+      stderr = appendTail(stderr, `${line}\n`);
+    }
+  });
 
   const playback = {
     get closed() {
@@ -466,7 +471,7 @@ function createPlayback(session) {
     frameStream.on('data', handleFrameData);
 
     ffmpeg.stderr.on('data', (chunk) => {
-      stderr = appendTail(stderr, chunk);
+      stderrTailLogger.write(chunk);
       logger.stderr(chunk);
     });
 
@@ -477,6 +482,7 @@ function createPlayback(session) {
     });
 
     ffmpeg.on('close', (code, signal) => {
+      stderrTailLogger.flush();
       logger.close(code, signal, stopReason, stderr);
       finishPlayback(1000, 'ffmpeg exited', code, signal);
     });
@@ -658,7 +664,7 @@ function getListeningPort() {
 
 function buildPlaybackArgs(session, inputUrl) {
   const { fps, quality, width } = session.options;
-  const videoFilter = `fps=${fps},scale='min(${width},iw)':-2:flags=bicubic`;
+  const videoFilter = `fps=${fps},scale=w='min(${width},iw)':h=-2:flags=bicubic:out_range=pc,format=yuvj420p`;
 
   return [
     '-hide_banner',
@@ -692,6 +698,10 @@ function buildPlaybackArgs(session, inputUrl) {
     videoFilter,
     '-codec:v',
     'mjpeg',
+    '-pix_fmt',
+    'yuvj420p',
+    '-color_range',
+    'pc',
     '-q:v',
     String(quality),
     '-f',
@@ -710,6 +720,10 @@ function createFfmpegLogger(kind, sessionId, pid) {
   const startedAt = Date.now();
   const label = `${kind}:${shortId(sessionId)}`;
   const lineLogger = createLineLogger((line) => {
+    if (shouldSuppressFfmpegLogLine(line)) {
+      return;
+    }
+
     logWarn(`ffmpeg stderr kind=${label} pid=${pid ?? 'unknown'} line="${oneLine(redactSecrets(line))}"`);
   });
 
@@ -734,6 +748,10 @@ function createFfmpegLogger(kind, sessionId, pid) {
   };
 }
 
+function shouldSuppressFfmpegLogLine(line) {
+  return line.includes('deprecated pixel format used, make sure you did set range correctly');
+}
+
 function createLineLogger(callback) {
   let buffer = '';