ffmpeg

ffmpeg.sh

# Fixing weird encoding issues from foreign files
ffmpeg -i ./video.mp4 -acodec copy -vcodec copy ./video.fixed.mp4

# Remove audio
ffmpeg -i ./render.mp4 -an -vcodec copy ./render.opti.mp4

# Good enough compression, exact same audio
ffmpeg -i ./render.mp4 -acodec copy -vcodec libx264 -crf 20 ./render.opti.mp4

# Transcode to NVENC (HEVC flavor). Good enough compression, exact same audio
ffmpeg -i ./render.mp4 -acodec copy -vcodec hevc_nvenc -preset llhq -rc cbr_hq -gpu any ./render.opti.mp4

# Transcode to NVENC (H264 flavor). Good enough compression, exact same audio
ffmpeg -i ./render.mp4 -acodec copy -vcodec h264_nvenc -preset llhq -rc cbr_hq -gpu any ./render.opti.mp4

# Transcode to H265. Good enough compression, exact same audio
ffmpeg -i ./render.mp4 -acodec copy -vcodec libx265 -crf 20 ./render.opti.mp4

# Transcode to VP9. Good enough compression. Audio converted to opus or vorbis
ffmpeg -i ./render.mp4 -vcodec libvpx-vp9 -b:v 0 -crf 31 ./render.opti.webm

# Transcode to H265. Good enough compression, compress audio and convert to mono
ffmpeg -i ./render.mp4 -acodec copy -b:a 44000 -ar 16000 -ac 1 -vcodec libx265 -crf 20 ./render.opti.mp4

# Loudness normalize audio to -1db -14LUFS
ffmpeg -i input.mp3 -af 'loudnorm=I=-14:TP=-1:LRA=11' output.mp3