Audio/Video Desynchronisation

Audio/Video Desynchronisation

[Raghav Gururajan]

[-- Attachment #1: Type: text/plain, Size: 367 bytes --]

Hello Folks!

I often get the following error/warning while playing media files via
mpv:

Audio/Video desynchronisation detected! Possible reasons include too
slow hardware, temporary CPU spikes, broken drivers, and broken files.
Audio position will not match to the video (see A-V status field).

How can I rectify this issue?

Thank you!

Regards,
RG.

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

Re: Audio/Video Desynchronisation

[Tobias Geerinckx-Rice]

[-- Attachment #1: Type: text/plain, Size: 1044 bytes --]

Raghav,

Raghav Gururajan 写道：
> I often get the following error/warning while playing media 
> files via
> mpv:
>
> Audio/Video desynchronisation detected! Possible reasons include 
> too
> slow hardware, temporary CPU spikes, broken drivers, and broken 
> files.
> Audio position will not match to the video (see A-V status 
> field).

This happens.  The reasons are stated clearly in the text.

This is not an issue with your operating system, and generally 
harmless.  Have you ever actually noticed desynchronisation (not 
the message)?  I haven't, and I see that warning daily.

If the text bothers you, you can try:
- Not using your {C,G}PU for other tasks while watching videos
- Enabling acceleration if supported (I can vouch for 
  intel-vaapi-driver)
- Raising the priority of the MPV process with {io,}nice
- Not playing from slow storage or networks at all
- Watching lower-bitrate movies
- Buying a more expensive computer (bonus points for an ‘X’ in 
  the name).

Kind regards,

T G-R

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 227 bytes --]

Re: Audio/Video Desynchronisation

[Raghav Gururajan]

[-- Attachment #1: Type: text/plain, Size: 764 bytes --]


> This is not an issue with your operating system, and generally 
> harmless.  Have you ever actually noticed desynchronisation (not 
> the message)?  I haven't, and I see that warning daily.

I do not get that message often, but when I do, I see stuttering of
playing media.

> If the text bothers you, you can try:
> - Not using your {C,G}PU for other tasks while watching videos
> - Enabling acceleration if supported (I can vouch for 
>   intel-vaapi-driver)
> - Raising the priority of the MPV process with {io,}nice
> - Not playing from slow storage or networks at all
> - Watching lower-bitrate movies
> - Buying a more expensive computer (bonus points for an ‘X’ in 
>   the name).

Thank you for your suggestions :)

Regards,
RG.

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

Re: Audio/Video Desynchronisation

[Tobias Geerinckx-Rice]

[-- Attachment #1: Type: text/plain, Size: 690 bytes --]

Raghav Gururajan 写道：
>> This is not an issue with your operating system, and generally 
>> harmless.  Have you ever actually noticed desynchronisation 
>> (not 
>> the message)?  I haven't, and I see that warning daily.
>
> I do not get that message often, but when I do, I see stuttering 
> of
> playing media.

Interesting.  Here, the drift is always corrected by MPV before I 
can even notice.

I'm not very familiar with profiling multimedia, but you could 
always keep something like htop, dstat, iotop, … (all and more in 
Guix) running while watching videos.  You might get lucky.  Or 
they might just slow your computer down further.

Good luck,

T G-R

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 227 bytes --]