ffmpeg hmtl5 video conversion note

ffmpeg hmtl5-video-conversion.sh

# ffmpeg hmtl5 video conversion

# MP4
# Adjust quality by changing the CRF or PRESET value, see https://trac.ffmpeg.org/wiki/Encode/H.265 for details

ffmpeg -i [IN-FILENAME] -acodec aac -strict experimental -ac 2 -ab 128k -vcodec libx264 -f mp4 -crf 25 -preset slow -s 1920x1080 [OUT-FILENAME].mp4


# OGV
# Adjust quality with -q:v (video) and -q:a (audio) values,  lower means better quality but bigger file size. Range is 0 to 10.

ffmpeg -i [IN-FILENAME] -c:v libtheora -q:v 7 -c:a libvorbis -q:a 4 [OUT-FILENAME].ogv


# WEBM
# Adjust quality by changing the CRF value, lower means better quality but bigger file size

ffmpeg -i [IN-FILENAME] -c:v libvpx-vp9 -crf 30 -b:v 0 -b:a 128k -c:a libopus -s 1920x1080 [OUT-FILENAME].webm