[FFmpeg-trac] #861(avformat:new): problem with ffio_limit
FFmpeg
trac at avcodec.org
Sat Dec 31 06:58:15 CET 2011
#861: problem with ffio_limit
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Reporter: exobuzz | Type: defect
Status: new | Priority: normal
Component: avformat | Version: unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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since ffmpeg commit 27d323577c19af218f8a5ac33364f213b623a023 dvd playback
(via libdvdnav) with xbmc4xbox hasn't worked. I have reverted this commit
and all is fine. When the code has got to
if(s->maxsize>=0 && remaining+1 < size){
remaining is a negative number and so the size is reest.
when entering the function ffio_limit
s->maxsize is 0
avio_tell(s) is a gradually increasing number as each packet is processed
(i assume this is called for each packet of data ?)
avio_size(s) returns 0.
I assume this is related to the way ffmpeg is being used by the xbmc4xbox
code, and so the size is not known, so I guess this function needs a check
for that, or we need to pass ffmpeg some additional information?
in anycase, when the code
size= remaining+1;
is run and size is set to for example -2354555 you can imagine things
don't work right.
..
the code before that last commit had
if(s->maxsize>=0 && remaining>=0 && remaining+1 < size){
and so size never got reset as remaining was negative.
- apologies if my understanding is wrong, as I am not familiar with the
ffmpeg code. Please advise me if this is something we need to change in
our code, or if ffmpeg should skip this if maxsize / avio_size is 0 for
example.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/861>
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