message: Changed ffmpeg verbosity semantics
diff: @@ -49,7 +49,8 @@ std::vector<string> FfmpegAudioCommandLine(const string& input_filename,
  "-nostdin", // No interactive commands accepted.
  "-f", input_format_id, // eg: "mp3"
  "-probesize", StrCat(kDefaultProbeSize), "-i", input_filename,
  - "-loglevel", "info", // Enable verbose logging to support debugging.
  + "-loglevel", "error", // Print errors only.
  + "-hide_banner", // Skip printing build options, version, etc.
  "-map_metadata", "-1", // Copy global metadata from input to output.
  "-vn", // No video recording.
  "-ac:a:0", StrCat(channel_count), "-ar:a:0",
  @@ -72,7 +73,8 @@ std::vector<string> FfmpegVideoCommandLine(const string& input_filename,
  "-probesize",
  StrCat(kDefaultProbeSize),
  "-loglevel",
  - "info", // Enable verbose logging to support debugging.
  + "error", // Print errors only.
  + "-hide_banner", // Skip printing build options, version, etc.
  "-vcodec",
  "rawvideo",
  "-pix_fmt",
  