[FFmpeg-devel] [PATCH] don't trust avi riff tag end

Baptiste Coudurier baptiste.coudurier
Thu Mar 19 19:32:32 CET 2009


On 3/18/2009 9:39 PM, Michael Niedermayer wrote:
> On Wed, Mar 18, 2009 at 06:35:21PM -0700, Baptiste Coudurier wrote:
>> Hi,
>> $subject,
>> This should fix demuxing avi generated through streaming and read
>> through streaming.
>> In the later case, RIFF tag end is 0, and when reading url_fsize will
>> return 0.
>> Like ffmpeg -i <file> -f avi - | ffmpeg -i -
>> Any problem with this ?
> fsize is used to detect damaged chunks, with INT64_MAX damaged chunks
> are accepted and can lead to skiping of the whole file instead of searching
> for the next valid chunk

I see, would it be ok to only set fsize to INT64_MAX when riff end tag
is not set then ?

Do you see any other alternative ?

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
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