https://bugs.kde.org/show_bug.cgi?id=371062
Bug ID: 371062
Summary: audio on some clips does not match playhead position -
only plays later audio, never earlier
Product: kdenlive
Version: unspecified
Platform: Neon Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: s_chriscoll...@hotmail.com
My screen capture software + codec combination creates video files where the
video feed appears to start a bit later than the audio. If I drag one of these
video clips to the timeline in Kdenlive and render the project, the resulting
video file has no synchronization issues.
However, if I try to play the clip in Kdenlive, either through the clip monitor
or on the timeline, the audio gets out of sync in a very strange way. Whenever
I stop the project and restart playback, the audio jumps forward beyond the
current playhead position. If I stop playback and then position the cursor at
an earlier point, the audio playback will still resume from a later point. In
fact, the audio is never able to go back to an earlier point of playback. If
you keep playing, starting, stopping, rewinding, etc., eventually, the duration
of the clip's audio will have been played, and any further attempts to play the
clip will result in nothing but silence.
The previous version of Kdenlive that I was using (don't remember--it was pre
KF5) did not have this problem, although I had to trim the beginning of the
clip a few seconds once imported onto the timeline if I wanted the audio and
video to be in sync. I edited many screencasts in that version of Kdenlive
without issues.
Reproducible: Always
Steps to Reproduce:
1. Download the following video and import it into Kdenlive's project bin:
https://dl.dropboxusercontent.com/u/8126161/audio-video-sync-test.avi
2. Play the clip either by A) playing it in the clip monitor, or B) dragging it
onto a track and playing the project.
3. Occasionally stop playback and reposition the playhead (both earlier and
later)
Actual Results:
The audio only plays forward, never returning to an earlier point in the audio
stream.
Expected Results:
The audio should be synced with the video.
Kdenlive 16.08.2 w/ MLT 6.0.0
OS: KDE Neon 5.8.1 64-bit (Plasma Desktop 5.8.1, KDE Frameworks 5.27.0, Qt
5.7.0)
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