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Render times and hangs with Linux Flowblade editor

published Feb 08, 2019 06:40   by admin ( last modified Feb 08, 2019 06:46 )

Verdict: "Mp4 lossless"on Flowblade 2.0 is the winner, neglible RAM use and 330MB output file on a scale from 47MB (h264) to 6.9GB (ffyuv).

Material: an 11 minute screencast with sound.

Render times and behavior
Lossless output Flowblade version Result RAM use Render time Render size
ffyuv 1 series fine < 1GB 2m 34s 6.9GB
h264 1 series hangs computer but finishes 16GB 8m 30s 46.6MB
ffv 1 series hangs computer, no finish 14GB 3m 58s 1.9GB
MPEG-4 2 series fine < 1GB 2m 28s 328.5MB


You can then use ffmpeg to make a smaller lossless video. For example:

ffmpeg -i input.mp4 -c:v libx264 -crf 0 -c:a copy output.mkv

brings down the MPEG-4 file to 144MB with neglible RAM use.