[Ffmpeg-devel] Two ASF related bugs and fixes

[Kohn Emil Dan]

Yep, I saw that. I have resent the post.


 					Sorry,

 						Emil


On Tue, 18 Apr 2006, Steve Lhomme wrote:

> emild at cs.technion.ac.il wrote:
>> Hello,
>> 
>> I have found two bugs related to ffmpeg's ASF file format.
>> 
>> 1) The first bug has to do with the ASF writer. The problem is caused by 
>> the
>> fact that the size of the padding is not adjusted to include the size of
>> the padding length field. This causes the last byte of the payload to be
>> overwritten with zeroes before it is written to disk, thus yielding an 
>> invalid
>> bitstream.
>> mplayer and even ffmpeg complain when such streams are passed to them.
>> 
>> I have put an input file which illustrates the problem at:
>> 
>> ftp://ftp.mplayerhq.hu/MPlayer/incoming/ASF_PROBLEM/WRITER/IN/Philips_qcif.mp4
>> 
>> and the resulting output at:
>> 
>> ftp://ftp.mplayerhq.hu/MPlayer/incoming/ASF_PROBLEM/WRITER/OUT/buggy_Philips_qcif.mp4.asf
>> 
>> The command line used was:
>> 
>> ffmpeg -i Philips_qcif.mp4 -r 15 -b 64 -an -s 176x144 -vcodec wmv1
>> buggy_Philips_qcif.mp4.asf
>> 
>> 
>> For example this is what mplayer has to say about the resulting output 
>> file:
>
> I think you ended up your email prematurely. The output of Mplayer is not 
> there, and there is no mention of the second bug.
>
> Steve
>
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