Hello, I installed mpv bundle but have following errors when playing video:
[sub] Could not find subtitle decoder for format ‘subrip’.
[ao/oss] Can’t open audio device /dev/dsp: No such file or directory
[ao] Failed to initialize audio driver ‘oss’
Could not open/initialize audio device -> no sound.
Running mpv -ao=help returns:
Available audio outputs:
oss OSS/ioctl audio output
null Null audio output
pcm RAW PCM/WAVE file writer audio output
Hi @p_m
Can you provide more information regarding your platform?
Is it a laptop, desktop or nuc?
Do you have normal audio output with others apps?
@dcharles can you help us here please
Two separate problems here:
Subtitle support in mpv was just added 3 days ago but I’m not sure it covers all the formats. No idea but we can look into this.
Audio could be several problems: Volume is 0%. Audio is routed to a non-plugged in output (common with analog out and HDMI/DP monitors plugged in without speakers!) or there is an unsupported audio codec in the media (AAC).
libass was added a few days back, that should be available now.
The audio problem as reported seems to be related to not having oss installed. Although this could be a side effect of not supporting AAC in a verbose log.
Thank you for your response. I just updated to version 29780 before seeing your answer.
About audio. “Volume is 0%” that could be the reason but now I can’t check because I updated to newer version of mpv which came with the last update. Although I also have Gnome Mpv (flatpak) installed and there was no such error even at 0% volume.
I’m using CL on laptop (MacBook) and there is no other monitor plugged in. I had sound in other apps except in mpv.
Now with the new version things are different 
Now I receive following error:
[lavf] Using subtitle charset: UTF-8-BROKEN
(+) Video --vid=1 () (h264 720x480 23.976fps)
(+) Audio --aid=1 --alang=eng () (eac3 2ch 48000Hz)
Subs --sid=1 --slang=eng (subrip)
(+) Subs --sid=2 ‘billions.s04e11.web.h264-memento.srt’ (subrip) (external)
Error opening/initializing the selected video_out (–vo) device.
Video: no video
Exiting… (Errors when loading file)
mpv -vo=help returns:
Available video outputs:
libmpv render API for libmpv
gpu Shader-based GPU Renderer
null Null video output
image Write video frames to image files
tct true-color terminals
drm Direct Rendering Manager
Before I had x11 as vo and now its missing!! I think its default vo.
When I force gpu as vo got following error:
[lavf] Using subtitle charset: UTF-8-BROKEN
(+) Video --vid=1 () (h264 720x480 23.976fps)
(+) Audio --aid=1 --alang=eng () (eac3 2ch 48000Hz)
Subs --sid=1 --slang=eng (subrip)
(+) Subs --sid=2 ‘billions.s04e11.web.h264-memento.srt’ (subrip) (external)
[vo/gpu] Failed initializing any suitable GPU context!
Error opening/initializing the selected video_out (–vo) device.
Video: no video
Exiting… (Errors when loading file)
So now with the new version there is no video. I guess the subs are ok because now there is no error for them.
Verbose output (mpv -v …) returns this:
…
[vo/gpu] Probing for best GPU context.
[vo/gpu/opengl] Initializing GPU context ‘wayland’
[vo/gpu/opengl] Initializing GPU context ‘drm’
[vo/gpu/opengl] DRM EGL backend can be activated only manually.
[vo/gpu] Failed initializing any suitable GPU context!
[cplayer] Error opening/initializing the selected video_out (–vo) device.
[mkv] deselect track 0
[cplayer] Video: no video
Thank you. Please see my response to ahkok. How can I install oss in CL?
You don’t need/want OSS. mpv should be using alsa or pulse.
Video output is working after switching to wayland instead of xorg in Gnome. Also subs are working now with this version. But again there is no audio. mpv -ao=help returns:
Available audio outputs:
null Null audio output
pcm RAW PCM/WAVE file writer audio output
According to mpv specification -ao=help lists “…compiled-in audio output drivers”. Can you please compile alsa and pulse in mpv bundle. Thanks.
Fixed in mpv-0.29.1-15. This will be released after this weekend:
$ /usr/bin/mpv -ao help
Available audio outputs:
pulse PulseAudio audio output
alsa ALSA audio output
oss OSS/ioctl audio output
null Null audio output
pcm RAW PCM/WAVE file writer audio output
Yes, I can confirm it’s working now. Thanks.