scoopiop.blogg.se

If your ffmpeg does not support -c, or -to, it is likely very outdated. 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 is equivalent: ffmpeg -ss 00:00:30.0 -i input.wmv -c copy -t 00:00:10.0 output.wmv In the above command, the timestamps are in seconds ( s.msec), but timestamps can also be in HH:MM:SS.xxx format. The following would skip the first 30 seconds, and then extract the next 10 seconds to a file called output.wmv: ffmpeg -ss 30 -i input.wmv -c copy -t 10 output.wmv

Change the -segment_time to increase/decrease the amount of time per chunk as desired.You can use the -ss option to specify a start timestamp, and the -t option to specify the encoding duration. The command below will split the video into chunks that are roughly 20 minutes long. there are very-few shared pixels with the previous frame).

These usually occur when the video snaps from one scene to another (e.g. Luckily, there is a better solution, where you can just tell FFmpeg that you want to split it into relatively equidistant chunks, and it will do this with no overlaps, by splitting on the nearest keyframe. Unfortunately, videos tend not to have "fade-to-black" scenes every 20 minutes, and even worse, I found that using ffmpeg -ss to break up the videos into different chunks, and then playing them back in a VLC playlist, I would end up with a little bit of overlap, making the video look like it would jump. Thus, I wanted to see if I could break the movie up into 20 minute chunks, interpolate those chunks in parallel, and then stitch those processed chunks together and perform a final 2-pass HEVC encode (which is multi-threaded). Unfortunately, the process runs on a single thread, so doing this for a 2 hour movie would take a looooong time. It's pretty amazing how well it does the job. I recently discovered how to get FFmpeg to interpolate frames in order to create amazing 60fps videos.