I use flowblade (v2.8) on Linux as a video editor and VLC as player.

I've run into problems with the colors looking dull on preview and after export (rendering) using flowblade.

The video file has been recorded with a Canon 80D.

ffprobe tells me (original file):

$ ffprobe MVI_3693.MP4
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1920x1080, 12013 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc (default)

When I convert the file to a lower resolution / bitrate using the ffmpeg command line tool ...

$ ffmpeg -i MVI_3693.MP4 -crf 27 -vf "scale=-1:720" -to 15 MVI_3693-720p.mp4
$ ffprobe MVI_3693-720p.mp4
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 1280x720, 469 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)

... I get nice results.

But when I load the same file into flowblade and export it, the colors have lost vibrance, contrast, etc.

I don't see any useful hints by ffprobe. From the metadata – yuvj420p(pc, bt709) – the bad version looks even closer to the original, but the image does not.

$ ffprobe export-flowblade.mp4
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 1778 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)

Here's the difference between the original and the exported version. The downscaled version to 720p looks like the original (color-wise), so I have not included image samples from it.

Yellow colors nice Yellow colors dull Red colors nice Red colors nice

I get no useful information from VLC either (all metadata except the language is the same).

What catches my attention is that the image in the preview window of flowblade already looks dull.

When I export a single frame from flowblade directly, I also get the dull colors. So the problem is most likely related to flowblade, not to export settings (I tried some variations with no success).

Any ideas / suggestions? Thanks!

PS: Cannot create tag [flowblade], too little reputation. If you can, please do so.


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