![]() ![]() If you already have a MP4/M4V/MOV file and want to "faststart" it then you can do so without needing to re-encode by using stream copy mode:įfmpeg -i input.mp4 -c copy -movflags +faststart output.mp4 You can do this with the following option: ![]() If uploading MP4/M4V/MOV files YouTube recommends that the moov atom should be at the beginning of the file. Same as above, but also re-encode the audio using AAC instead of stream copying it:įfmpeg -i input.mov -c:v libx264 -preset slow -crf 18 -c:a aac -b:a 192k -pix_fmt yuv420p output.mkvĬreate a video with a still image ( input.png) and an audio file ( audio.m4a):įfmpeg -loop 1 -framerate 2 -i input.png -i audio.m4a -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv The output should be a similar quality as the input and will hopefully be a more manageable size.įfmpeg -i input.avi -c:v libx264 -preset slow -crf 18 -c:a copy -pix_fmt yuv420p output.mkv Re-encode the video and stream copy the audio. The examples below use the same method as shown in the encoding guide but optimized for YouTube. This guide will show you how to create a high quality video using ffmpeg.įirst read the H.264 guide specifically the section on CRF. Uploading the original content is the first recommendation, but this is not always a choice due to the file size or format, so re-encoding may be required. Upscaling video for higher peak qualityīecause YouTube, Vimeo, and other similar sites will re-encode anything you give it the best practice is to provide the highest quality video that is practical for you to upload.
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