Auto remux DASH video/audio

[guysmiley3]

Currently more and more youtube and others are topping out at 720p as the "best" and using DASH for 1080p+ forcing you to download twice and remux yourself

Instead of relying on "best" tag either let the user select the video/audio they want and remux on the fly for them similar to running -f with two IDs

Note I did try passing IDs via the config.yml but it didn't really like that and I don't consider this a bug... more like option in future

[Rudloff]

We can probably remux on the fly by using pipes:
avconv -y -i <(curl videourl) -i <(curl audiourl) -c copy -map 0:v:0 -map 1:a:0 'file:remux.mkv'

But when I try that with a Youtube video, I get a broken result (audio is not correctly synced to video).

[Rudloff]

@guysmiley3 I added an experimental feature that allows you to download bestvideo+bestaudio.
If you want to test it, you can use the develop branch and add remux: true to your config.yml file.

[guysmiley3]

Works well!

Only issue I had was mpc refused to play the remux with video+audio... video or audio alone was fine
VLC was a skipping/non seeking mess but VLC usually has issues I find
Potplayer worked fine