Re: Video Decoding on imx6 with Debian
Hello,
for reference in case somebody reads the archives: I found an answer on the
gstreamer matrix channel
gst-launch-1.0 filesrc location=/mnt/net/fs/mnt/disk/scratch/xbian/storage/
videos/Erdmännchen/002_Zum_in_die_Luft_gehen.mp4 ! qtdemux ! h264parse !
v4l2h264dec ! kmssink
works for me.
Rainer
Am Sonntag, 3. November 2024, 15:24:38 CET schrieb Rainer Dorsch:
> Hello,
>
> does anybody have a working gstreamer pipeline for the imx6 with HW video
> decoding?
>
> Following https://trac.gateworks.com/wiki/ventana/vpu I setup the HW and
> gstreamer reports
>
> rd@mo:~$ gst-inspect-1.0 | grep -P "v4l2.*dec"
> video4linux2: v4l2h264dec: V4L2 H264 Decoder
> video4linux2: v4l2jpegdec: V4L2 JPEG Decoder
> video4linux2: v4l2mpeg2dec: V4L2 MPEG2 Decoder
> video4linux2: v4l2mpeg4dec: V4L2 MPEG4 Decoder
> rd@mo:~$
>
> I also allocated extra cma memory
>
> rd@mo:~$ cat /proc/cmdline
> console=ttymxc0,115200 quiet cma=256M
> rd@mo:~$
>
> But I did not manage to get a working h264 playback:
>
> # gst-launch-1.0 filesrc
> location=/mnt/net/fs/mnt/disk/scratch/xbian/storage/
> videos/Erdmännchen/002_Zum_in_die_Luft_gehen.mp4 ! rtph264depay !
> v4l2h264dec ! kmssink name=imx-drm sync=0
>
> Which outputs
>
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> ERROR: from element /GstPipeline:pipeline0/GstFileSrc:filesrc0: Internal
> data stream error.
> Additional debug info:
> ../libs/gst/base/gstbasesrc.c(3132): gst_base_src_loop (): /
> GstPipeline:pipeline0/GstFileSrc:filesrc0:
> streaming stopped, reason error (-5)
> ERROR: pipeline doesn't want to preroll.
> Setting pipeline to NULL ...
> Freeing pipeline ...
>
> When I use gstreamer's playbin, I get no errors, but the video is not
> displayed properly and on the output are messages that the HW is too slow (I
> assume in this case the HW decoder is not used).
>
> Any idea or hint is welcome.
>
> Many thanks
> Rainer
--
Rainer Dorsch
http://bokomoko.de/
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