[FFmpeg-user] need help for transcoding

Christian Schneider christian at ch-sc.de
Fri Sep 30 10:02:46 CEST 2011

Hi, I'm trying to convert a video file, which contains one video two
audio and one subtitle streams. See here:

Duration: 00:55:46.57, start: 0.000000, bitrate: 832 kb/s
    Stream #0.0(eng): Video: h264 (High), yuv420p, 1280x720, PAR 1:1
DAR 16:9, 25 fps, 25 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0.1(ger): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
    Stream #0.2(eng): Audio: ac3, 48000 Hz, 5.1, s16, 640 kb/s
    Stream #0.3(eng): Subtitle: [0][0][0][0] / 0x0000

but it seems to have a problem with the subtitles, ffmpeg seems it
can't read them:
Decoder (codec id 94210) not found for input stream #0.3

What kind of codec is this, and is there a way to make ffmpeg be able
to read it? (scodec copy works, but i'd like to have it in ass, if

Another small point i just noticed:
the stream bitrates are all in units of "kb/s", but for total it is
k-bytes/s and for audio it's k-bit/s, is this true? Should the unit in
some way denote that they are different?

Thanks in advance

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