Add support for MPV options

[Tibladar]

Streams served via rtsp:https:// aren't played: Nothing happens on selection (stdout mentions the channel when selected)

Example m3u file from a Fritz!Box DVB-C device:

#EXTM3U
#EXTINF:0,Das Erste
#EXTVLCOPT:network-caching=1000
rtsp:https://fritz.box:554/?avm=1&freq=120&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=0&pids=0,15,17,20,6615
#EXTINF:0,ZDF
#EXTVLCOPT:network-caching=1000
rtsp:https://fritz.box:554/?avm=1&freq=128&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=0&pids=0,15,17,20,6615,6160
#EXTINF:0,3sat
#EXTVLCOPT:network-caching=1000
rtsp:https://fritz.box:554/?avm=1&freq=132&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=0&pids=0,15,17,20,6615,1632

[clefebvre]

Try to play it directly with mpv from the command line and see if you get any errors.

[Tibladar]

Running via mpv:

> mpv "rtsp:https://fritz.box:554/?avm=1&freq=120&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=0&pids=0,15,17,20,6615"
[ffmpeg/demuxer] rtsp: CSeq 3 expected, 0 received.
[ffmpeg/demuxer] rtsp: method SETUP failed: 461 Unkown
[lavf] avformat_open_input() failed
Failed to recognize file format.


Exiting... (Errors when loading file)

A quick search revealed this issue: mpv-player/mpv#4845
Adding the commandline options as described in mpv-player/mpv#4845 (comment) worked .

[clefebvre]

I can't access your URL from here obviously. But using a publicly available stream, I can't reproduce the issue...

mpv "rtsp:https://freja.hiof.no:1935/rtplive/_definst_/hessdalen02.stream"

Support for rtsp is therefore OK, what the issue is here is that we need to be able to let the user add MPV options.

[clefebvre]

done by 87a8e61