Comment 25 for bug 403154

Hello Jonathan,

Sorry I didn't make it clear. The codec was mp4 in an mp4 format. The
others I tried were h.264 in an mp4 file format, and h.264 in an MTS
format. All three of these gave the same problem. (and still do)

I have also experienced the same problem with the latest version of
kdenlive from TJ's ppa. I have only tested kdenlive with mp4 codec in
mp4 format, and h.264 codec in MTS format. I used the same clips in both
OpenShot and kdenlive.

The earlier version of kdenlive which comes with Ubuntu wouldn't work at
all with my MTS files.

I think the problem must be with mlt or ffmpeg. TJ's debugger also
pointed to that.

Best wishes, Helen

On Sat, 2009-09-12 at 21:31 +0000, Jonathan Thomas wrote:
> Helen, what is your mp4 file encoded as? mpeg4? I only ask because mp4 can
> also contain h.264... which is AVCHD.
>
> Thanks,
> -Jonathan
>
> On Fri, Sep 11, 2009 at 10:17 PM, Helen McCall
> <email address hidden>wrote:
>
> > No - it has happened with MP4 codec as well.
> >
> > Helen
> >
> >
> > On Sat, 2009-09-12 at 02:48 +0000, Jonathan Thomas wrote:
> > > Quick question. Does this issue only happen when using AVCHD video
> > > clips?
> > >
> >
> > --
> > 100% CPU core usage when previewing time-line
> > https://bugs.launchpad.net/bugs/403154
> > You received this bug notification because you are the registrant for
> > OpenShot Video Editor.
> >
> > Status in OpenShot Video Editor: In Progress
> >
> > Bug description:
> > Using complex keyframes can cause the viewing port to freeze so it will not
> > play anymore.
> >
> > I have tested this with Jonathan's original Vimeo demo clip with the dog
> > and the leaves.
> >
> > I have attached project .osp file for examination.
> >
> > I put the clip on the timeline, and set the clip properties so Video had
> > fill enabled.
> >
> > I then set layout->end->x to 100% so it wiped across the screen
> >
> > I then duplicated this clip and placed the copy below it, and synchronised.
> >
> > On the duplicate I set layout->start->x to -100% and layout->end->x to 0%
> > so it wiped across following the upper clip.
> >
> > At this point in the editing, the timeline would usually play without the
> > viewing window freezing, but sometimes the viewing window would freeze and I
> > would have to close OpenShot and re-start it.
> >
> > The next thing I did was to switch the sound to "off" on the lower
> > duplicate clip.
> >
> > With these settings the timeline could not run fully without the viewing
> > port freezing.
> >
> > Also it had another dramatic effect!
> >
> > If I re-loaded this saved project at this state, it would sometimes
> > completely hang OpenShot as it tried to load!
> >
> > Sometimes it would load but without the clips being on the timeline, so
> > only the parent clip showing in the Project Files tab.
> >
> > Sometimes it would load fully and I could play part of the timeline before
> > the viewer froze.
> >
> > Helen McCall
> >
>