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How to Download m4a when MP4 is the best video & opus when WEBM is the best video [no MKV] #25887
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Hello, I'm a new user of youtube-dl, I started using it this week.
I've read the FAQ and googled for the doubt I have, but didn't find an answer for it.
I wanted to set a filter to download automatically the bestvideo and the bestaudio, but when the best video (best bitrate + highest resolution) is a .mp4 the bestaudio used to be the opus audio, so when it finishes the download it becomes a .mkv . I really would like the youtube-dl download the m4a when the mp4 is the best, and the webm audio when the best video is a VP9. So, I don't want the .mkv.
As far I've read and searched about, the only possible answer for this is downloading them separated, even so I didn't found a way it could be detected. "Well this video it was mp4 the best so get the m4a and join into mp4"
The --merge-output-format and --recode-video ends up converting to mkv because of the incompatible video/audio
If I download both audios, there is any practical command I could do to merge the right audio with the best video downloaded ? Or even a better solution for what I require?
Which ffmpeg command youtube-dl uses to merge audio & video?
I forgot to mention something important.
I'm downloading links on a list.txt I've created.
EDITED
Really bad support