[Kdenlive-devel] problems with latest svn/git

Dan Dennedy dan at dennedy.org
Sun Jun 20 17:34:58 UTC 2010

On Sun, Jun 20, 2010 at 9:14 AM, Mikko Rapeli <mikko.rapeli at iki.fi> wrote:
> I'm trying to use latest svn/git on Debian unstable and I've noticed a few

And svn/git heads of ffmpeg and mlt?

> problems. I'm not able to pinpoint when exactly this happens, but here's
> some feed back anyway:
>  * fine tuning clips on timeline and playing moved following clips tens of
>   seconds forward on one video track, corrupting the timeline if project is
>   saved -- workaround is to restart kdenlive with backup project file
>  * playing/previewing project from the start possibly only once,
>   after second try Project Monitor is stuck, no more previews -- workaround
>   is to not play from the beginning but move a few frames forward before
>   playback
>  * some clips continue to play on preview after end points, not always possible
>   to move or delete clips from timeline without restarting kdenlive, and
>   then some timeline corruption has often occurred

The above are some very strange problems. While I have not seen them,
I am not saying they do not exist because I am not heavily using
kdenlive myself, but they do appear they can be the result of a bad
build or installation. Did you fully clean the sources before your
latest build? Do you have more than one installation of mlt such that
it is building against one and running against another?

>  * File rendering profiles for h264 have bad audio quality even if video
>   quality is high, lots of audible compression artifacts

See aac encoder in FFmpeg. It has been worse that faac, which has
reputation for not being great. It continues to improve.

>  * h264 two pass rendering often stalls at 99%, output file is trash

This should be fixed now in MLT git, which I am releasing today.

> Maybe I should stick to the released version but there I think I had some
> other problems.


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