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vbv related questions

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Originally committed as revision 9958 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Michael Niedermayer 2007-08-06 00:19:17 +00:00
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doc/faq.texi
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@ -315,6 +315,23 @@ yes, (@url{http://dir.gmane.org/gmane.comp.video.ffmpeg.user})
see (@url{http://en.wikipedia.org/wiki/Thread_hijacking})
@section ffmpeg does not adhere to the -maxrate setting, some frames are bigger than maxrate/fps
Read the mpeg spec, read about video buffer verifer.
@section I want CBR but no matter what i do frame sizes differ
You do not understand what cbr is, please read the mpeg spec.
Read about video buffer verifer and constant bitrate.
The 1 sentence summary is that there is a buffer and the input rate is
constant, the output can vary as needed.
@section How do i check if a stream is CBR?
To quote the MPEG-2 spec:
"There is no way to tell that a bitstream is constant bitrate without
examining all of the vbv_delay values and making complicated computations."
@chapter Development