Created attachment 139005 [details]
test video files
STEPS TO REPRODUCE
1. download attached archive containing test video files
2. extract the downloaded archive to a location indexed by baloo
3. set details view mode in Dolphin
4. enable Aspect Ratio column
empty Aspect Ratio column. Please see the attached screenshot.
Aspect Ratio column should show the aspect ratio of the test video files
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.22.80
KDE Frameworks Version: 5.83.0
Qt Version: 5.15.3
Graphics Platform: Wayland
Created attachment 139006 [details]
screenshot of Dolphin
This is a bug for ffmpeg : we use ffmpeg's av_guess_sample_aspect_ratio to get video file aspect ratios, but this functions fails for the files you sent.
ffmpeg -i Screen_recordings/2021-02-18\ 03-36-58.mkv
The SAR (sample aspect ratior) is missing for the video stream.
I'd recommend you open a bug there.
Code is there https://ffmpeg.org/doxygen/2.7/libavformat_2utils_8c_source.html#l04188
Thank you Méven.
Reported to ffmpeg devs: https://trac.ffmpeg.org/ticket/9293
I read ffmpeg upstream bug response.
I see the issue some video files simply won't contain aspect ratio data.
I guess that we can use the video size to compute the aspect ratio as it should be what video player would do.
I made a MR to do that :
A video without aspect ratio is valid.
The issue is with the encoder that did not provide one.