openshot.bugs team mailing list archive

[Ryszard Goń <1654570@xxxxxxxxxxxxxxxxxx>]

I can confirm this. I also noticed that, before I tried to generate a
waveform, Openshot was using 187.6 MiB of RAM, after I told it to
generate a waveform though it just started increasing forever. The few
times I tried it got over 1 GiB before I killed it.

Attached is a log where I opened Openshot, placed just a single 40
minute long audio file on the timeline and told it to display the
waveform. I let it run for a few minutes before I killed it.

** Attachment added: "openshot-qt.log"
   https://bugs.launchpad.net/openshot/+bug/1654570/+attachment/4803603/+files/openshot-qt.log

-- 
You received this bug notification because you are a member of OpenShot
Bugs, which is subscribed to OpenShot Video Editor.
https://bugs.launchpad.net/bugs/1654570

Title:
  Particular 1080p video very slow to show audio waveform

Status in OpenShot Video Editor:
  New

Bug description:
   - Architecture is x86_64 
   - OS is Xubuntu 13.04 (yes, I know Ubuntu no longer support this version, but https://github.com/probonopd/AppImageKit/blob/master/README.md says "Use an old system for building (at least 2-3 years old)" :-)
   - Installation method is AppImage 
   - Version of OpenShot is 2.2.0 
   - The video plays & seeks fine in both "ffplay" and "melt".  
   - melt 0.8.8 
   - "ffplay -version" reports "avplay version 0.8.9-6:0.8.9-0ubuntu0.13.04.1" 
   - Drag-n-drop video from Project Files windowpane to track display, right-click video in the track display, choose Display > Show Waveform.  
   - The full video is a 1080p 24fps MP4, about 581 MB and 38 minutes long.  The Show Waveform process on this video takes prohibitively long (several minutes or it locks up forever, I suspect it's the latter).  
   - If I slice the video into pieces as big as 200 MB, the Show Waveform process takes a more reasonable length of time.  
   - I'm using the following command line to split the video:  

  MP4Box -splits 200000 video.mp4

   - "MP4Box -version" reports 0.5.1-DEV-rev4065
   - The largest split size that MP4Box will honour on this video is 569000.  At this split size, OpenShot still appears to take forever to draw the waveform.  
   - OpenShot CPU usage is at 100% of one core.  The old-school X wristwatch busy-pointer is shown, and the UI still responds (e.g., opening the Preferences window), but slowly.  Exiting OpenShot leaves /bin/bash .bin//openshot-qt.wrapper running @ 100% CPU time (one core).  
   - Pitivi old version 0.15.2 takes only seconds to show the waveform of the full 38-minute video.  

  Due to the size of the video, I haven't attached it to this bug
  report.  If you'd like me to get the full video to you some other way,
  please tell me.

  Many thanks.

To manage notifications about this bug go to:
https://bugs.launchpad.net/openshot/+bug/1654570/+subscriptions