Hi team, 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 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. It is true for 720p and 1080p videos downloaded from youtube. However, the size of total 9 segments for 1440p video and 4K video became smaller compared with source video. Can anyone please help me explain this situation? Thanks. _______________________________________________ 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".
