The anullsrc audio source filter can create silent audio. See also How to fix TV media player issues anullsrc

The null video filter will pass the video source unchanged to the output. The anull audio filter will pass the audio source unchanged to the output.

*nix users can also use the time command. Maximum memory consumption is not supported on all systems it will usually display as 0 if not supported. Shows CPU time used and maximum memory consumption. You can output to /dev/null, or NUL in Windows, if you want to choose a muxer but not actually output a file:įfmpeg -y -i input -c:v mpeg4 -f mp4 /dev/nullĪdding the -benchmark global option will output benchmarking information at the end of an encode which can be informative with the null muxer. This example will map the first video stream, encode with libx264, then discard the output:įfmpeg -i input -map 0:v:0 -c:v libx264 -f null. It can also be used to test encoding without the overhead of outputting a file. To test decoding and demuxing (using null muxer): it can accept any type of input codec, doesn't have to be rawvideo for instance). The null muxer uses a wrapped frame so there is no muxing overhead (i.e. It is mainly useful for testing or benchmarking purposes. The null muxer does not generate any output file.

creating a blank video 'canvas' for filtering.testing encoding speed without the cost of disk writes.This can be useful for testing and benchmarking purposes, creating inputs, and filtering. There are several ways to utilize 'null' in ffmpeg.

Powershell ffmpeg