Bug#869660: ffmpeg: choppy video playback in Kdenlive & VLC in sid

[James Cowgill]

Control: found -1 7:3.2.6-1
Control: notfound -1 7:3.2.5-1
Control: tags -1 moreinfo

Hi,

On 25/07/17 13:19, Vincent Pinon wrote:
> Package: ffmpeg
> Version: 7:3.2.5-1
> Severity: important
> 
> Dear Maintainer,
> 
>    * What led up to the situation?
>    Upgrading sid around mid july (after few weeks forgetting about it)
>    suddenly made video programs very uncomfortable to use: noticed in
>    Kdenlive, but VLC too.
>    Problem also reported by other user on Kdenlive forum:
>    https://forum.kde.org/viewtopic.php?f=265&t=140299
> 
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
>    I forced downgrade back to stretch. Kdenlive & MLT versions remained
>    the same, but libavcodec & co changed between 3.2.6 & 3.2.5
> 
>    * What was the outcome of this action?
>    Kdenlive is smooth to use in stretch, but only 1 or 2 fps & choppy
>    audio in sid.
> 
>    * What outcome did you expect instead?
>    I expect video programs to work in sid.

Debian's VLC doesn't use the packaged version of FFmpeg so if you see
the issues in VLC, FFmpeg probably isn't to blame.

Stretch has FFmpeg 3.2.5 and sid has 3.2.6, however at the time your
linked thread started, FFmpeg 3.2.6 didn't exist. This means it's likely
they could reproduce it with an old FFmpeg.

Is it possible for you to try different versions of VLC and FFmpeg on
your system to see if they are the problem (eg: just upgrade ffmpeg to
sid)? Could you try other players as well like ffplay or mpv?

Thanks,
James

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