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output-example.c "buffer underflow" and "VBV buffer size not set"

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output-example.c "buffer underflow" and "VBV buffer size not set"

Jieyun Fu
I always got the "buffer underflow" and "VBV buffer size not set" message
when I ran libavformat/output-example.c to synthesize an mpeg file. No such
issues for avi. I wonder if there is anything we can do to fix it here?

You can see the code from here:

http://cekirdek.uludag.org.tr/~ismail/ffmpeg-docs/output-example_8c-source.html

Output #0, mpeg, to 'noend.mpg':
    Stream #0.0: Video: mpeg1video (hq), yuv420p, 352x288, q=2-31, 400 kb/s,
90k tbn, 30 tbc
    Stream #0.1: Audio: mp2, 44100 Hz, 2 channels, s16, 64 kb/s
[mpeg @ 0x8e83020] VBV buffer size not set, muxing may fail
[mpeg @ 0x8e83020] buffer underflow i=0 bufi=2002 size=6731
[mpeg @ 0x8e83020] buffer underflow i=0 bufi=4043 size=6731
[mpeg @ 0x8e83020] buffer underflow i=0 bufi=6084 size=6731
[A LOT MORE SIMILAR MESSAGES]

Thanks so much!
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