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.