Hi, On Tue, 4 Sep 2018 at 13:15, tugouxp <13824125...@163.com> wrote:
> i launch a pipe line with with gstreamer command as below: > gst-launch-1.0 filesrc location=/mnt/UDISK/N_1080P_AVC_60F.avi ! avidemux > ! h264parse ! omxh264dec ! queue ! waylandsink > the target sink i use was "waylandsink" , which take weston wayland > server as compositor server. i grab the pipe line graph like follows > picture, the waylandsink receive data format with "YV12" format, which can > be supported > by my soc display hardware, but when i debug the kernel with display > register, i can only found one RGB graphic layer was used, not even a > single YUV layer was take up. which means there must be someone doing the > convertion job from "YV12" to "RGB" fomrat, and compositor the video > picture and GUI into one layer. > > but from the below picture, the only module between the YV12 > gstwaylandsink and the display device is the "weston" server, so is the > weston is the key to do the convertion job? can i show the yuv picuture > directly without convertion? > Weston can do this just fine, but in general you will need Weston 5.0.0 using the DRM backend in order to do so. If this is still not happening, I recommend looking at the DRM debug information included with https://gitlab.freedesktop.org/wayland/weston/merge_requests/10 (you will need to rebuild from source) in order to understand why the video is not being displayed on an overlay. Cheers, Daniel
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