Hi, Coming back regarding my attempts to get encoding using vaapi-hardware acceleration to work...
First, Vincent, concerning your point of ffmpeg not being compiled with vaapi enabled in Debian - well, that's correct and not correct somehow: it's not compiled with enable-vaapi, but vaapi is still working (at least in stretch), see this Debian bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830880 For me, a command like ffmpeg -vaapi_device /dev/dri/renderD128 -i infile.MP4 -vf 'format=nv12,hwupload' -c:v h264_vaapi outfile.mp4 works fine and encoding 4K video runs about 4x faster! What I struggle with is adding these options into the rendering profile or to begin with into the rendering script. I created the rendering script which contains the line PARAMETERS_0. But how can I add these vaapi-related options? Which one goes where? Any hints are very welcome ;-) Thanks a lot. Best, Bernd On Dienstag, 8. August 2017 14:31:13 CEST Vincent Pinon wrote: > Hello, > > Note that you need to have FFmpeg built with vaapi or nvenc support, which > is not the case of Debian package. I don't know what's needed for Intel, > but for NVidia you have to download a SDK linked to closed-source driver, > providing personal information: showstopper for me (and many packagers) :\ > > Please let us know of any progress on your side. > > Evert, did you try to share your custom profiles using "HotNewStuff" > function in Kdenlive? ;) > > 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-m...@gmx.ch[1]> 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 regardsBernd > > > Evert VorsterIsometrix Acquistion Superchief > > > > > > > -------- > [1] mailto:b-m...@gmx.ch
