Proxy of a clip rendered by kdenlive displays incorrectly.
My project is 1080p, and I imported a clip with a resolution of 4K. It displays correctly, but as soon as a proxy is generated & enabled, the proxy displays as a "thin" stripe over the middle.
Kdenlive_Proxy_Resolution-2021-04-22_10.55.45
Update: I dropped the resolution of the clip to 1080p by re-encoding it with Kdenlive, and now the 1080p proxy was showing the same effect. Attaching the file here.
The proxies are generated with a custom hardware profile: -noautorotate -hwaccel cuvid -c:v %nvcodec -resize 1080x1920 -i -vcodec h264_nvenc -g 1 -bf 0 -vb 0 -preset fast -acodec copy
Update on the update:
Tracked down the issue to the resize directive, for some reason it corrupts only on the files output by kdenlive, and works correctly on footage directly from cameras. Is there something wrong with the output format of kdenlive? I am using the included h264 profile with mp4 container.
Also, on software proxy generation the resize works properly.