2017-02-08 17:29 GMT+01:00 Chao Zhou <[email protected]>: > I am cropping a video to 9 small segments with the command below: > > ffmpeg -i source.mp4 -filter_complex \ > "[0:v]crop=1/3*in_w:1/3*in_h:0:0[out1];[0:v]crop=1/3*in_w:1/3*in_h:1/3*in_w:0[out2];\ > [0:v]crop=1/3*in_w:1/3*in_h:2/3*in_w:0[out3];[0:v]crop=1/3*in_w:1/3*in_h:0:1/3*in_h[out4];\ > [0:v]crop=1/3*in_w:1/3*in_h:1/3*in_w:1/3*in_h[out5];[0:v]crop=1/3*in_w:1/3*in_h:2/3*in_w:1/3*in_h[out6];\ > [0:v]crop=1/3*in_w:1/3*in_h:0:2/3*in_h[out7];[0:v]crop=1/3*in_w:1/3*in_h:1/3*in_w:2/3*in_h[out8];[0:v]crop=1/3*in_w:1/3*in_h:2/3*in_w:2/3*in_h[out9]" > \ > -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 Why? > 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. Carl Eugen _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
