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convert a video to the web video formats: mp4, webm, ogg
# how to use: sh fileToConvert.mp4
# how to use for batch conversion: find "$VIDEOS" -name '*.mp4' -exec sh -c 'ffmpeg ... or sh convertV..
output=$(echo $1 | sed 's/^\(.*\)\.[a-zA-Z0-9]*$/\1/')
# mp4
ffmpeg -i $input -vcodec h264 -acodec aac -strict -2 -s 1280x720 $output.mp4
# webm
#ffmpeg -i $input -f webm -vcodec libvpx -acodec libvorbis -ab 128000 -crf 22 -s 1280x720 $output.webm
#ffmpeg -i $input -f webm -s 1280x720 $output.webm
ffmpeg -i $input -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis $output.webm
ffmpeg2theora $input -o $output.ogv -x 1280 -y 720 --videoquality 5 --audioquality 0 --frontend
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