On Fri, 18 Sep 2015 11:25:35 +0200, Gilles <[email protected]> wrote: >I need to work on a video where the speaker was badly lit but also had >a very bright screen to show slide:
For the benefit of other newbies happening on this thread later, here's a working exemple to 1) split the video in two parts, 2) make the dark part brighter and the bright part darker, and 3) join the two into a single video: ffmpeg -i input.mp4 -c:v libx264 -filter_complex "split=2[v1][v2]; [v1]crop=200:330:527:0,lutyuv=y=val*0.75[brightpart]; [v2]lutyuv=y=val*2.5[darkpart]; [darkpart][brightpart]overlay=x=520:y=0[v]" -map "[v]" -c:a copy -f mp4 output.mp4 In the "crop" part above, the four parameters are width, height, x, and y, respectively. Some examples: http://stackoverflow.com/questions/13390714/ http://video.stackexchange.com/questions/4563/ Thank you. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
