ffmpeg 0.5 flv to wav conversion creates wav files that other programs won't open.

Posted by superrebel on Stack Overflow See other posts from Stack Overflow or by superrebel
Published on 2010-04-05T21:17:37Z Indexed on 2010/04/05 21:23 UTC
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ffmpeg

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Hi,

I am using the following command to convert FLV files to audio files to feed into julian, a speech to text program.

cat  ./jon2.flv | ffmpeg -i - -vn -acodec pcm_s16le -ar 16000 -ac 1 -f wav - | cat - > jon2.wav

The cat's are there for debugging purposes as the final use will be a running program that will pipe FLV into ffmpeg's stdin and the stdout going to julian.

The resulting wave files are identified by "file" as:

jon3.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 16000 Hz

VLC (based on ffmpeg) plays the file, but no other tools will open/see the data. They show empty wav files or won't open/play. For example Sound Booth from CS4.

Has anyone else had similar problems? Julian requires wav files 16bit mono at 16000 Hz. Julian does seem to read the file, but doesn't seem to go through the entire file (may be unrelated).

Thanks,

-rr

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