[Ffmpeg-devel] H264 decoding problem

Guillaume POIRIER gpoirier
Thu Oct 12 11:13:24 CEST 2006

Klaas-Pieter Vlieg a ?crit :
> Hi,
>> From: Guillaume POIRIER [mailto:poirierg at gmail.com] 
>> Sent: 12 October 2006 10:36
>>>>> not reproduceable
>>>> That's a pity. I should have mentioned that I've built with Mingw 
>>>> I'll see if I can debug it.
>>> If I undefine ARCH_X86 in cabac.h it works fine.
>>> Either MingW or my Intel T2500 cpu doesn't like the 
>> assembler code in 
>>> cabac.h
>> I've run into a compiler bug with a snapshot of GCC 4.2 from 
>> early September.
>> It wasn't reproduceable with any other compiler (even ICC 
>> compiles it fine).
>> I'd say please re-try with a different compiler version, and 
>> you should be fine.
> Thanks, I will try that. Though I could live with undefining ARCH_X86 in cabac.h

I can't reproduce your problem with your PSP sample on my FFmpeg build. 
It is still coded fine with GCC 4.0 and ICC 9.1

> Unfortunately, another H264 decoding problem showed since R6655 when decoding the same sample file:
> [h264 @ 007104A0]top block unavailable for requested intra mode at 0 0
> [h264 @ 007104A0]error while decoding MB 0 0, bytestream (9012)
> [h264 @ 007104A0]concealing 510 DC, 510 AC, 510 MV errors
> Guillaume, would you mind testing this sample in ffplay?
> (upload.mplayerhq.hu/MPlayer/incoming/h264-psp/h264-psp.avi)

Can't reproduce this bug either.


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