RPi 3B w/ Arch Linux Arm: omxplayer plays audio, but no video

[andrewboring]

Raspberry Pi 3b with Arch Linux Arm with VC4.
Wayland+Weston with DRM backend.

HDMI connected to Sunfounder 10" IPS LCD Display.
Changed to a Toshiba 720p TV after reading this thread.

I can play the same video without issue using both mpv and gstreamer, so I'm thinking it's a configuration issue specific to omxplayer's workings.

$ omxplayer big_buck_bunny_720p_1mb.mp4 
Video codec omx-h264 width 1280 height 720 profile 77 fps 25.000000
Audio codec aac channels 6 samplerate 48000 bitspersample 16
Subtitle count: 0, state: off, index: 1, delay: 0
V:PortSettingsChanged: 1280x720@25.00 interlace:0 deinterlace:0 anaglyph:0 par:1.00 display:0 layer:0 alpha:255 aspectMode:0

But no video. I can hear the audio through HDMI by default, but no video is displayed.

I've tried every --display option from this thread, but with the same result: audio plays, but no video.

I'm using Wayland/Weston and omxplayer from Arch, but also tried compiling omxplayer directly. Same result for both on the original 10" LCD display.

After switching back to an Arch-packaged omxplayer and the Toshiba display, I tried a few --display with 0, 1, 2, and 7 and the screen will turn full-screen-black briefly, then flip back to the Weston desktop with no visible video playing (while playing audio).

• omxplayer -g big_buck_bunny_720p_1mb.mp4: https://pastebin.com/gd891g1G
• strace omxplayer big_buck_bunny_720p_1mb.mp4: https://pastebin.com/FCpgip7w
• /boot/config.txt: https://pastebin.com/4AWzTpeA
• ~/.config/weston.ini: https://pastebin.com/mwkVqFPa

What am I missing?

[jehutting]

Afaik omxplayer doesn't work with /boot/config.txt line
dtoverlay=vc4-kms-v3d

[popcornmix]

Afaik omxplayer doesn't work with /boot/config.txt line

correct

[andrewboring]

Ah. Well, that certainly was it.
Commented out the dtoverlay, reboot, and then switched to fbdev-backend for weston. Everything plays fine now. Thanks for that.

I hadn't encountered anything in my searches that indicated omxplayer was incompatible with the vc4 driver. What's the reason omxplayer doesn't work with vc4-kms-v3d?

[popcornmix]

kms means the arm controls display. That means gpu cannot drive display.
omxplayer is a gpu side video player

[andrewboring]

Got it. Thanks for the clarification.