[FFmpeg-user] Optimization

Carl Eugen Hoyos ceffmpeg at gmail.com
Thu Nov 1 18:46:57 EET 2018

2018-11-01 3:31 GMT+01:00, Marcus Lim <drakeskywing at gmail.com>:
> Hey all,
> New to the list and trying to get my head around ffmpeg a bit still.
> So I am using ffmpeg to create slideshows out of individual images, with an
> audio backing track (usually mp3), and then encoding as MP4 (video is h264
> and audio is acc), but for some reason the process is taking up to 1.4Gb of
> memory which is blowing me away.
> Now I am using a complex filter to achieve this, with multiple inputs, and
> example of my command is below:
> ffmpeg \
> -loop 1 -t 4 -i
> test/ed141148-9b79-494b-a26d-f5c84535eeaf8912937006552540487.tmp \
> -loop 1 -t 4 -i
> test/ed141148-9b79-494b-a26d-f5c84535eeaf5351513282402727883.tmp \

I suggest you put the files names in a text file and use the concat demuxer.

An alternative is to rename the files as tmp-01 to tmp-15 and use:
ffmpeg -i tmp-02%d

Both solutions will not have the increased memory usage and will
significantly simplify your command line.

Carl Eugen

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