Bash - Video Related Stuff

Youtube-dl:

apt-get install python3-pip
pip install --upgrade youtube_dl

youtube-dl https://some.site.com/some/video/23958797

Compress downloaded video using libx265 & compression rate 28

# This codec won't play on some video players:
ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4

Taking audio from video:

ffmpeg -i input.webm -vn -acodec copy output.mp3 

This command tells ffmpeg to:

• use the input.webm file as the input
• discard the video stream (-vn)
• copy the audio stream as is (-acodec copy)
• save the output as an MP3 file named output.mp3

Note that if you want to save the output as a different audio format, you can replace "output.mp3" with the desired file extension (e.g. "output.ogg" for Ogg Vorbis format).

(If audio codec isn't already mp3 in the video:)

ffmpeg -i input.webm -vn -acodec libmp3lame -q:a 2 output.mp3

This command tells ffmpeg to:

• use the input.webm file as the input
• discard the video stream (-vn)
• use the libmp3lame codec to encode the audio stream to MP3 format (-acodec libmp3lame)
• set the quality of the MP3 output to a value of 2 (-q:a 2)
• save the output as an MP3 file named output.mp3

The -q:a option sets the quality of the MP3 output, with a range of 0 to 9, where 0 is the best quality and 9 is the worst. The default value is 4, but a value of 2 or 3 is generally recommended for a good balance of size and quality.