https://bugs.kde.org/show_bug.cgi?id=410486
Bug ID: 410486
Summary: extract frame extracts wrong frame
Product: kdenlive
Version: 19.04.3
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: thedi...@gmx.eu
Target Milestone: ---
Created attachment 121887
--> https://bugs.kde.org/attachment.cgi?id=121887&action=edit
shellscript re-extracting frames from original source video files based on
frame image file names
SUMMARY
"Extract frame" and "Extract frame to project" functionality on a clip exports
wrong frame ... probably the previous I frame or some other frame.
STEPS TO REPRODUCE
1. use any mp4/H.264 video clip
2. select some frame within
3. export frame to project
4. cross-check exported frame with currently selected frame
OBSERVED RESULT
Different frame (earlier I-frame) got exported than selected in the clip.
EXPECTED RESULT
Correct frame which is selected gets exported.
VERSIONS
kdenlive-19.04.3-x86_64.appimage
OS ffmpeg 4.1.3-0ubuntu1
ADDITIONAL INFORMATION
When running ffmpeg manually for extracting frames, it will extract the
*correct* frame based on the framenumber as specified in the exported frame's
image file name. This leads to the assumption that this is in fact a problem
with the current Kdenlive version(s), directly or indirectly, as older
versions, especially the stable pre-refactor branch work correctly. Kdenlive
appimage uses the appimage-internal ffmpeg as far as I can see from the config
environment dialog.
For reference, I've attached a shell script that automatically re-extracts the
frames from the original video source files based on the frame image filenames
and the project framerate deduced from the specified kdenlive project file.
This shows that the problem is inside Kdenlive (or MLT?), but not with ffmpeg
(unless we suspect my ffmpeg version 4.1.3-0ubuntu1 to be much different from
the appimage's ffmpeg).
--
You are receiving this mail because:
You are watching all bug changes.
