https://bugs.kde.org/show_bug.cgi?id=448010
Bug ID: 448010
Summary: Rendering Crashed for Video with Alpha profiles: VP8,
VP9, Alpha mov (Version 22.03.70 (rev. 720ff532a))
Product: kdenlive
Version: unspecified
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: crash
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: cuyan...@uottawa.ca
Target Milestone: ---
SUMMARY
Trying to render videos with the alpha profiles crashes, although alpha mov
will give a video file output. Not only is there no transparency, but most of
the profiles don't produce any exported videos.
STEPS TO REPRODUCE
1. Create a title clip.
2. Add to timeline.
3. Export as VP8, VP9, and/or Alpha mov.
OBSERVED RESULT
Rendering crash with no output for VP8 and VP9. Alpha mov will also crash but
will produce an export. However, the exported clip has no transparency.
EXPECTED RESULT
Exported clip with transparency.
SOFTWARE/OS VERSIONS
Windows: 10
ADDITIONAL INFORMATION
Log for alpha mov:
mlt_repository_init: failed to dlopen C:\Program
Files\kdenlive\lib\mlt/libmltjack.dll ("C:\Program
Files\kdenlive\lib\mlt\libmltjack.dll": The specified module could not be
found.)
[mov @ 0000000002aaa980] Timestamps are unset in a packet for stream 1. This is
deprecated and will stop working in the future. Fix your code to set the
timestamps properly [mov @ 0000000002aaa980] Encoder did not produce proper
pts, making some up. [mov @ 0000000002aaa980] Application provided invalid, non
monotonically increasing dts to muxer in stream 1: 239616 >= 239616
Log for alpha vp8:
mlt_repository_init: failed to dlopen C:\Program
Files\kdenlive\lib\mlt/libmltjack.dll ("C:\Program
Files\kdenlive\lib\mlt\libmltjack.dll": The specified module could not be
found.)
[libvpx @ 0000000006530dc0] Bitrate not specified for constrained quality mode,
using default of 256kbit/sec [libvpx @ 0000000006530dc0] Transparency encoding
with auto_alt_ref does not work
Log for alpha vp9:
mlt_repository_init: failed to dlopen C:\Program
Files\kdenlive\lib\mlt/libmltjack.dll ("C:\Program
Files\kdenlive\lib\mlt\libmltjack.dll": The specified module could not be
found.)
[libvorbis @ 0000000002a49480] 33 frames left in the queue on closing
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