Hardware acceleration / vaapi

[farid abdelnour]

2017-08-08 9:31 GMT-03:00 Vincent Pinon <vpinon at kde.org>:

>
> Evert, did you try to share your custom profiles using "HotNewStuff"
> function in Kdenlive? ;)
>

+1


>
>
> Vincent
>
>
>
> Le mardi 8 août 2017, 12:47:31 CEST Evert Vorster a écrit :
>
> Hi there, Bernd.
>
> Kdenlive supports hardware encoding through custom encoding profiles.
>
> This is my profile for hardware hevc encoding with nvidia:
>
> properties=x265-medium f=matroska vcodec=hevc_nvenc acodec=aac
> crf=%quality ab=%audiobitrate+'k'
>
>
> It would have been awesome if mlt and ffmpeg used the same format in
> command lines, but this is not the case. At least they are close.
>
> Unfortunately I only have intel cards, so I cannot test the intel vaapi
> acelleration for you.
>
>
> Kind regards,
>
>
> On 8 August 2017 at 10:35, B.M. <b-misc at gmx.ch> wrote:
>
> Dear all,
>
> After some years without I'm getting back to video editing... I already
> searched quite a lot but it's really hard to find "realiable" information,
> so I decided to ask here:
>
> - It seems that hw accel is not available in kdenlive
>
> - As far as I understand kdenlive uses mlt which uses ffmpeg. ffpmeg can
> use hardware acceleration for de- and encoding. So is mlt to "blame" for
> missing hw accel. in kdenlive?
>
> - There has been a patch (bug 378832) "use of vaapi in transcoding and
> rendering" which seems to tackle my question. But what did it really change
> -
> / what is it for? I didn't find more info on that and it's in kdenlive
> 17.04, while Debian is at 16.12. and before I compile myself I'd like to
> get more info.
>
> - Furthermore I found a thread on this list back in April "kdenlive and
> mlt nvenc enabled" covering the same topic but for nvidia instead of Intel
> graphics; unfortunately nobody reported back if it really works. For me it
> reads like the patch I mentioned above.
>
> So regarding the current state of hw accel in kdenlive I'm still uncertain.
>
> Thank you for your inputs.
>
> Kind regards
> Bernd
>
>
>
>
> --
>
> Evert Vorster
> Isometrix Acquistion Superchief
>
>
>
>


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