[FFmpeg-user] ffplay frustrations/questions/suggestions

Toerless Eckert tte at cs.fau.de
Fri Nov 18 06:58:07 EET 2016


Thanks, Marton, - inline.

On Thu, Nov 17, 2016 at 09:56:54PM +0100, Marton Balint wrote:
> > If there is no option to select the output device, i would suggest:
> > - Document that there is no such option, eg: following the documentation for
> >   "-devices".
> > - Print in the output of "-devices" which the actual current output device is.
> >
> > If there is an option, pls. let me know and document.
> ffplay can't use libavdevice output devices, it uses the SDL drivers.

So "ffplay -devices" lists output devices that itself can not use ?

> That may be caused by the reason that ffplay currently wants to use
> a hardware accelerated renderer with VSYNC support. I guess a
> fallback can be implemented to use any available renderer if that
> fails.

Sounds right.  ffplay works locally, but i had to run it remotely via Xwindows
and that swhere it failed.

Fallback would be lovely. Remote troubleshooting is extremely helpfull
in many cases.

> >Finally: in latest git, ffplay is not even built without SDL2 library
> >discovered on the system. That doesn't seem to be right either.
> 
> Why? FFplay does need SDL2, it can't work without it.

How does someone compiling ffmpeg learn about this dependency ? 
(i was kinda guessing it...)
Eg: i can't remember that i've seen this in a README, and the configure for
ffmpeg does not show this dependency in it's output.

Cheers
    Toerless

> Regards,
> Marton
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-- 
---
tte at cs.fau.de


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