Re: [Mlt-devel] avformat producer crash

[Dan D. <da...@de...>]

On Sun, Feb 17, 2013 at 10:09 PM, Dan Dennedy <da...@de...> wrote:
> On Sun, Feb 17, 2013 at 11:41 AM, j-b-m <j-...@us...> wrote:
>> Hello.
>>
>> Following Kdenlive bug report 2963, I realized that the "force_fps"  property
>> of the avformat producer triggers an assert in FFmpeg when used on avi files.

This is fixed. I resolved the kdenlive bug, but I am not sure what to
set the "Fixed in Version" to when it is a MLT fix.

>> Problem can be reproducer easily:
>>
>> melt test.avi force_fps=40
>>
>> exits with following info:
>>
>> Assertion (int64_t)st2->time_base.num*ast2->rate == (int64_t)st2-
>>>time_base.den*ast2->scale failed at libavformat/avidec.c:1514
>>
>>
>> Any idea how to fix this?
>
> Looks like the AVI demuxer does not like anyone tampering with the
> AVStream.time_base, but force_fps is doing exactly that, which is
> really against the rules. I will have to take a crack at making a
> local copy of the video stream's time_base, adjusting that on
> force_fps, and referencing the local copy in the seek-and-sync code.
> However, I am not entirely sure it will give the same results; we
> shall see.
>
> --
> +-DRD-+



-- 
+-DRD-+