Bug#888501: closed by Sebastian Ramacher <sramacher at debian.org> (Re: Bug#888501: gstreamer1.0-vaapi: Latests versions does not work at all)

[Sebastian Ramacher]

Control: severity -1 important

On 2018-02-15 11:56:19, Adrian Bunk wrote:
> Control: reopen -1
> Control: reassign -1 libva2
> 
> >...
> > > On Fri, 26 Jan 2018 10:40:36 -0200 Junior Polegato <linux at juniorpolegato.com.br> wrote:
> > > 
> > > > libva info: VA-API version 0.40.0
> > > > libva info: va_getDriverName() returns 0
> > > > libva info: Trying to open /usr/lib/i386-linux-gnu/dri/i965_drv_video.so
> > > > libva error: /usr/lib/i386-linux-gnu/dri/i965_drv_video.so has no function
> > > > __vaDriverInit_0_32
> > > > libva info: va_openDriver() returns -1
> > > 
> > > Hi,
> > > 
> > > this looks like a version mismatch between your Intel driver and
> > > libva, nothing related to gstreamer-vaapi.
> > 
> > Yes, so people need to update their drivers at the same time. We could add
> > Breaks for the old driver packges, but that woul just ensure that we make the
> > upgrade path from stretch to buster more complicated.
> 
> It would actually make the upgrade path easier by ensuring that people 
> and distributions have versions that work together.
> 
> stretch -> buster upgrade scenarios are one case.
> 
> Backports are another, where a new libva might be pulled in without
> matching new driver packages (proper package dependencies might help
> to make it clear that backporting libva can be problematic).

libva is currently not backportable. You'd need to rebuild all consumers in
backports. And unless somebody does the work to support that, this isn't any
sensible scenario.

> And without proper package dependencies, it might happen that testing
> contains versions that don't work together.
> This would create problems for people running testing,
> and for derivative distributions that are based on testing.

The drivers already have strict dependencies on the correct libva version they
support. And if the drivers for the correct version are missing, players will
fallback to software decoding in the worst case (if they don't, it's a bug in
the player / decoder).

Closing and lowering the severity. Please do not reopen again.

Cheers

> 
> > Cheers
> 
> cu
> Adrian
> 
> -- 
> 
>        "Is there not promise of rain?" Ling Tan asked suddenly out
>         of the darkness. There had been need of rain for many days.
>        "Only a promise," Lao Er said.
>                                        Pearl S. Buck - Dragon Seed
> 

-- 
Sebastian Ramacher
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