https://bugs.kde.org/show_bug.cgi?id=421849
Karol Babioch <ka...@babioch.de> changed:
What |Removed |Added
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CC| |ka...@babioch.de
--- Comment #3 from Karol Babioch <ka...@babioch.de> ---
Same issue here, proxy clips are not working for some clips.
I debugged it, in my case the following command is used to create the proxy
clip:
ffmpeg -hide_banner -y -stats -v error -i /home/kbabioch/Downloads/DJI_0551.MP4
-vf scale=640:-2 -g 1 -bf 0 -vb 0 -qscale 6 -ab 128k -vcodec mpeg2video -acodec
ac3 -map 0 /home/kbabioch/Downloads/output.mkv
This fails with the following error:
[matroska @ 0x5585470dee40] Only audio, video, and subtitles are supported for
Matroska.
Could not write header for output file #0 (incorrect codec parameters ?):
Invalid argument
Error initializing output stream 0:0 --
An output file is generated, but is only 365 bytes big and contains no useful
video information.
When kdenlive is then trying to load this clip, the following happens:
[matroska,webm @ 0x7fbe001260c0] File ended prematurely at pos. 365 (0x16d)
When I remove the "-map 0" argument, it works correctly, although I'm not an
ffmpeg guru, so I can't judge if and why it is needed.
>From my point of view there are multiple issues here:
- Error during conversion is not caught
- Proxy clip is loaded/used (despite errors)
- No useful information in the UI at all
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