Bug#765969: (no subject)

[Francesco Muzio]

Il 18/12/2014 11:06, Rémi Denis-Courmont ha scritto:
>    Hello,
>
> Le 2014-12-07 01:37, Francesco Muzio a écrit :
>> The bug has been debated here
>> https://trac.videolan.org/vlc/ticket/12622
>>
>> And here seems to be found a possible patch, not yet applied
>>
>> https://trac.videolan.org/vlc/attachment/ticket/12622/vlc-2.2-greenline.patch 
>>
>
> That patch is incomplete and I suspect it will lead to crashes in some 
> cases.
>
you are right.
> I still consider this a bug in XVideo drivers, but there is a 
> work-around in VLC now. Unfortunately, that means XVideo output will 
> require memory copying. This is not avoidable without a fix for the 
> XVideo drivers (which is unlikely to happen anytime soon).

it's strange that a bug happens with two different drivers at same time

>
>> Probably this bug happen only with libav and not with ffmpeg
>
> So that sentence sounds a lot like trolling libav developers and the 
> choice of libav by the Debian multimedia team. I don't know where you 
> stand on libav vs ffmpeg, but the green line issue is solely between 
> VLC and the XVideo drivers. VLC and at least some XVideo drivers 
> disagree on how scaling cropped pictures should be achieved.
>

I haven't any position in the libav vs ffmpeg debate. It's simply an 
observation, because this bug seems reproducible for only few users.
For my experience, on Debian, this bug affect machine with Intel and 
Radeon drivers, but not with the nouveau driver. But I have tested only 
VLC builded with libav.