[mythtv-users] Status of ffmpeg 4.4.1

[Klaas de Waal]

On Wed, 3 Nov 2021 at 20:30, Peter Bennett <pb.mythtv at gmail.com> wrote:

> Most things are working with ffmpeg 4.4.1 in the devel/ffmpeg-resync branch
>
> What is not working:
>
> - Audio "upconvert stereo to 5.1 sound" when playing a video with stereo
> sound - error message and no audio playback .
>
> - Speedup / slowdown when playing a video with dolby 5.1 audio - error
> message and no audio playback .
>
> - Report from John Pilkington that an existing bug with edit markers and
> step lengths now reacts slightly differently - I don't know if it is
> better or worse with the new ffmpeg.
>
> I am looking into the 5.1 audio issues.
>
> Peter
>
>
> Hi Peter,

As mentioned in the mythtv-dev mailing list, there are with the new FFmpeg
often blocking artifacts when starting playback and when jumping forward
and backward.
This happens also on recordings made with the old FFmpeg so it looks to me
like a playback-only issue.
I do see this on my cable TV recordings which are H264, 1080i interlaced
50/25 frames per second, both HD and SD.
I do NOT see this on Bluray rips which are 24p.
I also do not see this on recordings with MPEG2 video coding, only on H264.

Hope you can have a look into this also,

Thanks,
Klaas.
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