Measuring the amount of time ffmpeg takes to transcode on Windows using Powershell (similar to the time command on Linux). Set the start time at 5.500 seconds and scale to 1280px width.įfmpeg -i input.mp4 -vframes 1 -vf scale=1280:-1 'poster.jpg'Ĭreate a poster image for the video file. The above command will rescale the video to a quarter of Full HD resolution in portrait orientation, set a duration of 30 seconds (the -t option) and set the output video stream 0.0 framerate to 30 frames per second. Twitter has some video requirements such as a maximum framerate, that need to be accounted for:įfmpeg -i test.mp4 -c:v libx264 -profile:v baseline -vf scale=540:-1 -t 30 -r:0.0 30 test-540.mp4 I’ve looked this command up way too many times:įfmpeg -i test.mp4 -c:v libx264 -profile:v baseline -vf scale=640:-1 -an test-640.mp4 Update, 7 October 2018 Rather than use animated GIFs when I’m trying to show a video without sound, I prefer to use ffmpeg to strip out the audio and scale down the video. max on Provisioning OS X and Disabling Unnecessary Services.

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Ffmpeg remove audio from mp4