> I have two laptops. One is a 2.5GHz dual-core w/ 4G ram. It's running
> Ubuntu 9.10 and only auto-installs Pitivi 0.13.3. The other laptop is
> a single-core 1.6GHz w/ 1.5G ram. It's running Ubuntu 10.4 and
> auto-installs the newer version of Pitivi (not handy or I'd tell you
> the exact version number).
Beware that the latest version is 0.13.5, and older versions are
unsupported as we the project doesn't have the manpower to maintain
multiple simultaneous versions.
In 0.13.4:
> That means working with a project and the rendering is all slower. I'm
> not complaining (esp about the rendering part, not much you can do to
> speed it up),
There's a couple of known performance issues, some of which may have
improved a little bit in 0.13.5; See also
http://pitivi.org/wiki/Performance_problems_in_0.13.4 (may be outdated)
> I think one adjustment could help on the compilation part: have a
> Edit->Preferences where you can turn off the "preview frames" in video
> and audio
There already is an option for that, exactly where you said it should
be :) look for "thumbnails"
They're quite a bit slow, there probably is something that could be done
to improve the performances of thumbnail generation, but afaik nobody is
working on it currently.
> Maybe when a source is added to the clips list it can be rt-clicked
> and selected to "not preview the framed-preview" so that a person can
> select which clips are important to be previewed in the timeline and
> which ones aren't. To build on that idea, a stream can be rt-clicked
> in the timeline and selected to preview or not preview in the
> timeline.
Nah. Adds ui complexity for nothing. It's a performance/optimization
problem, putting this onto the shoulders of the "user" is not a
solution, it's an excuse for poor performance :) I've seen software out
there that does thumbnailing for video and waveforms *really* fast, so
I'm sure something can be done here. To me, it's all or nothing.
> Another thing on the frame-preview in the timeline - while pitivi is
> actually rendering the project the timeline preview should be
> disabled, as pitivi advances through the frames and the timeline
> advances, it eats up cpu trying to build the newly viewed timeline
> segment's frame-previews. Why does it need to do that? It's just
> taking cpu away from the important process - the render.
Please test with pitivi 0.13.5, and if this is still the case I guess
you should comment asking to reopen
https://bugzilla.gnome.org/show_bug.cgi?id=590253
> The second issue I'd like to discuss is actually a bug. I have this
> one video that is 1:50 long (that's one hour and 50 minutes). The
> first 30 minutes I needed to overlay the video with still-shots. That
> worked just fine (except it takes about 2 hours to position the stills
> correctly because the timeline frame-preview issue discussed above).
> The render takes well over 24 hours (again, I can live with that, I'm
> on an older laptop), but when it's done the video and the audio don't
> match up.
Try with 0.13.5, there were significant problems with still-shots in
0.13.4... should be fixed now, if not, you should file bugs :)
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