[mythtv-users] Status of ffmpeg 4.4.1

[Peter Bennett]

On 11/5/21 3:17 PM, Klaas de Waal wrote:
>
>
> On Wed, 3 Nov 2021 at 20:30, Peter Bennett <pb.mythtv at gmail.com 
> <mailto: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.
>
>
>
I am not able to reproduce this on the devel/ffmpeg-resync branch. I 
tried with NVDEC and with OpenGL playback profiles. Which playback 
profile are you using?

Peter

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