Simon Daniels <simondaniels23@...> writes: > I'm using the -ss and -t flags to trim a section of video out of a > longer original one. As an example, if the video is 60 minutes long, > and I want minutes 50-52, ffmpeg takes quite a while to get to that > point. I'll see something like the following (I know my -ss flag > values don't exactly match my example) > > Users-MacBook-Pro:ffmpeg-0.10 user$ ./ffmpeg -i "Long GOPRO.MP4" > -vcodec copy -acodec copy -ss 0:05:10 -t 0:00:30 "output1.mp4"
Your command line asks ffmpeg to decode the complete input file and start encoding / remuxing after 5:10 (for 30 seconds). The faster (but possibly less exact) variant is to seek to 5:10 and start decoding there: ffmpeg -ss 5:10 -i input -vcodec copy -acodec copy out.mp4 (-ss may not always work with -codec copy but I just tested it successfully on a mov trailer.) > ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers Completely unrelated to your question: If you are an end user, you are strongly encouraged to always use latest git head instead of a release: git head always contains more features and fixes. Carl Eugen _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user
