choppy playback on timeline

[Hans Petter Birkeland]

I have tried out 1.3 a bit, and the first thing I noticed was that playback on the timeline is very choppy. Also the playhead "shivers" during playback. When I double click a fil in the Project Files area, it plays just fine. But it is not possible for me to edit anything like this. The same video files have been fine in previous versions.

Linux Mint 9
OpenShot 1.3 from PPA, upgraded via Synaptic
Video files I have tried are motion jpg .avi, 640x480, 30 fps.

[Jonathan Thomas (jonoomph)]

I tried out your video, and had no issues with it on 1.3. It played silky smooth both when I double click the file, and on the timeline. The underlying video editing framework has not changed (from 1.2.2 to 1.3.0), so this is very strange. I would be sure you are not zooming, panning, rotating, or any other effect which would "scale" the image, or something like that.

Also, you might try reverting to version 1.2.2 and verify that the exact same steps do not produce stuttering, etc... Once we learn more about this bug, we can update the status to 'confirmed'... if we can confirm it. =) Thanks!

[Hans Petter Birkeland (hanspb)]

Of course I have no scaling or anything :-). Just dropped the clips on the timeline. This also happens if I open an old project that was fine before. I will try to go back to 1.2.2. when I have some time. Might also try on a different pc, although that must wait until next week.

[Hans Petter Birkeland (hanspb)]

I could not find 1.2.2 anywhere, so I installed 1.1.3 from Ubuntu's Universe repo, and the timeline plays fine there.

[Hans Petter Birkeland (hanspb)]

Ok, I loaded a Mint 10 live CD, just to get access to OpenShot 1.2.2. In this version the timeline runs fine. I then removed 1.2.2 and installed 1.3 on the live system, and the timeline got all choppy and stuttering again. So I don't know, something must have changed.

[Olivier Girard (eolinwen)]

Hi,
I have try too your video and I have had no problem with.
Have you check all your dependencies (see here : http://www.openshotusers.com/forum/viewtopic.php?f=12&t=758)

[Hans Petter Birkeland (hanspb)]

Yes, all dependencies are ok. And why would they not be when I use Synaptic or apt-get to install? Also bear in mind, this have now been on two different installations. My normal system and a live cd system, although on the same hardware. Monday or tuesday I'll try on a couple of other machines.

[Hans Petter Birkeland (hanspb)]

I have tried a couple of things now. My other machines were not powerful enough to run OpenShot (one is a real oldie and the other an old windows machine with too little memory to install OpenShot running a live CD) so that did not work. then I tried AV Linux live DVD on my main machine. I noticed that the OpenShot version there was not the release 1.3, but the alpha1. Anyway the timeline played fine there. So either the problem lies in the release version of 1.3 or in the combination of Mint and 1.3. Not very likely though, since I had the problem in both Mint 9 and 10.

[Hans Petter Birkeland (hanspb)]

Also I would like to add that I tried removing OpenShot completely and installing again. It did not help.

[Olivier Girard (eolinwen)]

I have a Lucid, two Linux Mint, a LMDE (okay that 's a Debian) and a LM 9 KDE. And that 's okay for me.
Hum. What is your version of MLT ? I have the last 0.62/0.60 on all my configuration.

[Hans Petter Birkeland (hanspb)]

Mlt is 0.5.10. I noticed Jonathan indicated in the release notes that upgrading mlt to the latest version was not easy, and I have not seen any instructions. So I am not going to try. Anyway, OpenShot 1.2.2 was fine with this mlt version, so I doubt this is the problem. If mlt is involved it will have to be the combination of mlt 0.5.10 and OpenShot 1.3.
I also tried Kdenlive a couple of days ago, which is also using mlt, and that was fine. I don't know, maybe my trusty old laptop has suddenly become too old...

Anyway, I really appreciate your efforts, thanks a lot.
:-)

[Olivier Girard (eolinwen)]

Look in the link that I given you. Under Ubuntu dependencies, you have the good PPA for having a last version of MLT.

[Hans Petter Birkeland (hanspb)]

I updated to mlt 0.6.0 via that ppa, but still no improvement.

[Olivier Girard (eolinwen)]

Hi,
Sorry for the delay.
Another track about your problem like I don't understand why it doesn't work for you.
How have you add/install Openshot (which PPA) ?
Have you try that : https://answers.launchpad.net/openshot/+faq/983
Thanks.

[Hans Petter Birkeland (hanspb)]

Ok, I tried this now. Ffmpeg plays fine, but it is stuttering with Melt. Here is output from "ffmpeg -i":

---
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5.1-1ubuntu1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  libavutil 49.15. 0 / 49.15. 0
  libavcodec 52.20. 1 / 52.20. 1
  libavformat 52.31. 0 / 52.31. 0
  libavdevice 52. 1. 0 / 52. 1. 0
  libavfilter 0. 4. 0 / 0. 4. 0
  libswscale 0. 7. 1 / 0. 7. 1
  libpostproc 51. 2. 0 / 51. 2. 0
  built on Mar 4 2010 12:35:30, gcc: 4.4.3
Input #0, avi, from 'MVI_1241.AVI':
  Duration: 00:00:22.26, start: 0.000000, bitrate: 15155 kb/s
    Stream #0.0: Video: mjpeg, yuvj422p, 640x480, 30 tbr, 30 tbn, 30 tbc
    Stream #0.1: Audio: pcm_u8, 11024 Hz, mono, s16, 88 kb/s
At least one output file must be specified
---

OpenShot was installed from http://ppa.launchpad.net/jonoomph/openshot-edge/ubuntu

Hans Petter

[Olivier Girard (eolinwen)]

Ah Strange, we have the same version of MLT installed and I have yet try with melt and all is okay.

[Juha Riihimäki (jriihimaki)]

I have this bug too. I have Lucid and problem started when I upgraded OpenShot to 1.3. I've checked dependencies and evrything is ok. When I removed 1.3 and went back to 1.2.2 evertihing runs fine.

Files can be played fine from terminal with melt and previewed from project files area. Bug affects is only when played from timeline. Then processor usage goes to 100% video goes choppy and audio stutters.

bug affects to all types of video files I've tried.