Le mercredi 29 mai 2019 à 19:19 -0300, Fabio Estevam a écrit : > Hi Sven, > > On Wed, May 29, 2019 at 5:55 PM Sven Van Asbroeck <thesven73@xxxxxxxxx> wrote: > > > I am now running 5.2-rc2 with Philipp's non-plus imx6q patch. > > > > Performance is still much worse than the Freescale baseline. > > > > I am not at all worried about vpu scaler performance, after all v8 is an > > in-progress patch. > > > > I am much more concerned about the CODA h264 slowdown. My 1080p30 test > > video runs at half the speed compared to the Freescale kernel. The best it > > can do is 28fps, which results in visible 'jerks' in the video. Note that > > this is without using the scaler. > > > > Questions: > > - is the performance slowdown a known issue? > > - is there anything I've missed in the gstreamer pipelines below? > > - is there anything I can do to help? > > > > A) mainline 5.2-rc2 with Philipp's latest non-plus patch: > > $ time gst-launch-1.0 filesrc > > location=/home/default/jellyfish-10-mbps-hd-h264.mkv ! matroskademux ! > > h264parse ! v4l2h264dec ! kmssink can-scale=0 sync=0 > > real 0m 32.01s > > In my tests I had to pass 'capture-io-mode=dmabuf' to get a smooth > video playback. This is the default since 1.14.0. > > Please check the explanation from Philipp at: > http://gstreamer-devel.966125.n4.nabble.com/IMX-Scaler-CSC-m2m-driver-td4671175.html
