I downloaded using
youtube-dl from https://www.dr.dk/tv/live/dr2#!/ The saved file is
.flv, but it does not play with
avconv cannot convert it:
$ avconv -i hl.flv hl.mp4 avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) [flv @ 0x11d1fe0] Could not find codec parameters (Video:  / 0x0000, 2196 kb/s) [flv @ 0x11d1fe0] Could not find codec parameters (Audio:  / 0x0000, 0 channels, 128 kb/s) hl.flv: could not find codec parameters
My guess is that the codec is simply wrong and forcing the player to use the correct codec will fix this. Is there a tool that can assume the codec is wrong, and try different codecs to see if one works?