[FFmpeg-user] ... invalid, non monotonically increasing dts... with yadif=1

[Andy Furniss]

Andy Furniss wrote:
> Andy Furniss wrote:
>> Apologies in advance if I am doing something stupid or no one else can
>> recreate.
>>
>> This (19meg) possibly broken (but plays OK) mpeg2 transport stream will
>> fail transcoding if I try to make 50fps with yadif=1, but works OK with
>> yadif=0.
>
> It does seem to be to do with yadif=1/double framerate, I just tested
> three 5 minute samples recorded from a different channel hd/x264 this
> time and two of the three failed.
>
> I know google will find patches that may help, but yadif=1/double fps
> doesn't feature with those streams, so maybe this is a separate issue as
> the streams are fine with yadif=0 or no yadif.

I played a bit more with this - some observations.

I can reproduce on Fedora 15 so it's not just my setup.

I see that ffmpeg git is not very bisectable - but this shows me that 
this problem doesn't happen with avconv which gets built depending on 
which commit is landed on.

I went back to October manually choosing the merge commits so ffmpeg 
built and couldn't find one that worked.