So, instead of -i -ss 30 -t 10 you could also do -i -ss 30 -to 40 to achieve the same thing. You can use -to instead of -t to specify the timestamp to which you want to cut.
Note that -t is an output option and always needs to be specified after -i.įor older ffmpeg versions, if you use -ss after -i, you get more accurate seeking at the expense of a slower execution altogether. The following would clip the first 30 seconds, and then clip everything that is 10 seconds after that:įfmpeg -ss 00:00:30.0 -i input.wmv -c copy -t 00:00:10.0 output.wmvįfmpeg -ss 30 -i input.wmv -c copy -t 10 output.wmv The timestamps need to be in HH:MM:SS.xxx format or in seconds ( s.msec).
You can use the -ss option to specify a start timestamp, and the -t option to specify the encoding duration. (if necessary, add -analyzeduration 100M -probesize 100M) simple scalingįfmpeg -i input.avi -vf scale=320:240 output.aviįfmpeg -ignore_editlist 1 -i INPUT -i TUG-33.png -filter_complex "scale=1920:1080, overlay=x=(main_w-overlay_w-30):y=(main_h-overlay_h-30)" OUTPUT One needs to add -ignore_editlist 1 which in turn requires proper cutting, see above. filter_complex "concat=n=3:v=1:a=1" \įfmpeg -i INPUT.mp4 -i TUG-33.png -filter_complex "overlay=x=(main_w-overlay_w-30):y=(main_h-overlay_h-30)" OUTPUT.mp4Ĭould not find codec parameters for stream 0. This is done by creating two intermediate files by rendering only the initial or end part and at the same time encoding to mpeg-2 transport streams:įfmpeg -i INPUT -ss 00:00:00 -to STARTCUT -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.tsįfmpeg -i INPUT -ss ENDCUT -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.tsįfmpeg -i file1.mp4 -i file2.mp4 -i file3.mp4 \ See Concatenation of files with same codecs, at concat protcocol cut out a part from STARTCUT – ENDCUT In this case one need to do the splitting already in addition to recoding and resizing so that it splits at the exact time!!! concat two mp4 filesįfmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.tsįfmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.tsįfmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4 Now that is a pain, because watermarking (see below) requires WARNING: since splitting is only possible at keyframes, this will by default set an “editlist” and start at the previous keyframe, and tell the player to start playing after the required difference. So here we go, in some rather random order: split at time stampsįfmpeg -i INPUT -ss STARTTS -to ENDTS -c copy OUTFILE (Update : Found that excellent lengthy intro: FFmpeg – The Ultimate Guide) It is such a fantastic beast full of features, that I will never run out of new things to learn. Over the years, and in particular with preparing videos of a conference for publication on YouTube, I have accumulated a few reminders how to do things with FFmpeg.
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