[Ffmpeg-devel] Fix for overflow issue in mpegvideo.c

Martin Boehme boehme
Tue Jul 26 16:15:21 CEST 2005

Michael Niedermayer wrote:
> On Tuesday 26 July 2005 13:19, Martin Boehme wrote:
>>Michael Niedermayer wrote:
>>>btw i dont think buf_size=width*height*1.5 is enough, try random 255/0
>>>sample values at qp=1, btw2 if you actually try this i would be
>>>interrested in the results
>>Tried it, with MPEG-4 I get about width*height*3.63 bytes per frame...
>>ouch. So I now use width*height*4... ;-) under the assumption that the
>>above is just about the worst case... (BTW, is that true?)
> probably not

Hm, my feeling, too... any chance of computing an upper limit on the 
amount of data the encoder can spit out? (I'm not necessarily advocating 
doing this... just interested...)


Martin B?hme
Inst. f. Neuro- and Bioinformatics
Ratzeburger Allee 160, D-23538 Luebeck
Phone: +49 451 500 5514
Fax:   +49 451 500 5502
boehme at inb.uni-luebeck.de

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