[FFmpeg-user] Size of cropped video segments
Carl Eugen Hoyos
ceffmpeg at gmail.com
Thu Feb 9 00:52:41 EET 2017
2017-02-08 17:29 GMT+01:00 Chao Zhou <czhou5 at binghamton.edu>:
> I am cropping a video to 9 small segments with the command below:
> ffmpeg -i source.mp4 -filter_complex \
> -map "[out1]" out1.mp4 -map "[out2]" out2.mp4 -map "[out3]" out3.mp4 \
> -map "[out4]" out4.mp4 -map "[out5]" out5.mp4 -map "[out6]" out6.mp4 \
> -map "[out7]" out7.mp4 -map "[out8]" out8.mp4 -map "[out9]" out9.mp4
Complete, uncut console output missing.
> I expect the size of total 9 segments will be larger than the source video
> since the search space of the segment became smaller and encoding
> efficiency reduced.
Even if this were a valid argument (I apparently misunderstand it due to
the language barrier) it is certainly not a sufficient argument for a bigger
(or smaller) filesize: You can either specify a bitrate or output quality (which
is the default for x264), in case of quality several other factors are
responsible for the output filesize.
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