If you want to choose specific streams then use the select option. Multiple options can be separated with a :, which means that any : have to be escaped (so use \:).įfmpeg -i input.file -c:v libx264 -c:a mp2 \ Options can be applied to an individual output: is equivalent to -f mpegts in a normal ffmpeg command-line. The example below outputs an MKV file, and a UDP stream. The tee pseudo-muxer was added to ffmpeg on, and allows you to duplicate the output to multiple files with a single instance of ffmpeg. You don't want to encode twice, that wastes cpu. map '' -acodec … -vcodec … output3īut, what if you want to have duplicate outputs of your encoding? For example, when you are streaming a live audio/video and want to save a duplicate of that stream into the file at the same time. # the `split=3` means split to three streamsįfmpeg -i input -filter_complex 'split=3 boxblur negate yadif' \ If you would like to use filtering, but with the same filter applied to all outputs, simply use -filter_complex with the split filter.įor example, to encode your video in HD, VGA and QVGA resolution, at the same time, but with the yadif filter applied, you would use something like this: This way ffmpeg can create several different outputs out of the same input(s).įor example, to encode your video in HD, VGA and QVGA resolution, at the same time, you would use something like this: If you are on Windows, you can replace the \ at the end of each line with a ^ or you can combine the separated lines into "one very long one".įfmpeg supports multiple outputs created out of the same input(s) in the same process. That means the actual command line, typed in the shell, would be:įfmpeg -i input -acodec … -vcodec … output1īut either version will work in a sane shell.
So, if the example shows something like this: The following example command lines, that are usually written in one line, have been split into multiple lines, using the new-line delimiter character \ for more clarity.
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