Add note for multiple video tracks, when present

[krissi]

Is would be great to have a video variant where the speakercam and the slidecam are both stored as separate video streams. This way is would be possible to have 2 separate windows which can be moved e.g. to separate displays.

A quick and very dirty techdemo:

ffmpeg -i jh19-ffm-1004-deu-CO2_Fahrzeuginfo_hd.mp4 -i jh19-ffm-1005-deu-Short_Messenger_hd.mp4 -c copy -map 0 -map 1 merged.mkv
vlc --sout-all --sout #display merged.mkv

[derchrisuk]

Most of the Videos already have 2 Video streams, one for the mixed signal, and one slide stream.

[krissi]

Oh, did not notice that in the past. Thank you

Not sure if this is mentioned on the page, maybe the videos could be marked with a box like the "These files contain multiple languages."-box.