FFMpeg console voodoo

Useful for hexing, discombobulating, uncucking and generally fuckerarounding with media you want to upload

Extract mp4 from mkv

• ffmpeg -i inputfilename.mkv -acodec copy -vcodec copy outputfilename.mp4

Re-Encode as mp4

• ffmpeg -i inputfilename.avi -c:v libx264 -crf 19 -preset slow -c:a aac -b:a 192k -ac 2 outputfilename.mp4

Re-Scale mp4

• ffmpeg -i inputfilename.mp4 -vf scale=-1:720 outputfilename.mp4
• Sometimes this will give an error that the scale is not divisible by 2
• If this happens use a number other than 720

Extract subtitles

• ffmpeg -i inputfilename.mkv -map 0:s:0 subtitles.srt
• This extracts the first subtitle file (stream 0)
• Switch to 0:s:1 for the next file

Burn subtitles

• ffmpeg -i inputfilename.mp4 -vf subtitles=subtitles.srt outputfilename.mp4

Holy shit you're an expert now

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