Hi guys!
Sorry to resurrect the old thread, but have you found the solution for this?
I fixed the aggravating intermediate screen tearing problem by switching from fkms to kms, but now I'm having those errors... I know they're not that big of a deal, but they really poke my eyes.

...I had massive tearing even with Vsync ON and double buffering - and I don't like tripple buffering because of input delay.
Switching from fkms to kms fixed it and all the games are much more responsive right now!

I went back to looking into this again today. I've seen a bunch of threads around where people talk about vlc and using kms for hardware acceleration, so it seems like it is maybe supposed to work?

I captured the output from running it. The output looks identical regardless of whether I'm using FKMS or KMS. With FKMS, the image correctly shows on the screen (either hdmi0 or hdmi1, whatever I specify). With KMS, the output is the same, but the screen still just displays the terminal, nothing else shows up on either display.

Is there some other place I can look for errors, some other log file maybe?

Here's what the output is:

$ cvlc /home/pi/PieMarquee2/marquee/system/snes.png VLC media player 3.0.12 Vetinari (revision 3.0.12-1-0-gd147bb5e7e) [015a11d0] vlcpulse audio output error: PulseAudio server connection failure: Connection refused [015a2ac8] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11 [015a2ac8] main interface error: no suitable interface module [01528b58] main libvlc error: interface "dbus,none" initialization failed [015bc2a0] main interface error: no suitable interface module [01528b58] main libvlc error: interface "globalhotkeys,none" initialization failed [015bc2a0] dummy interface: using the dummy interface module... [aab014b0] gles2 generic error: parent window not available [aab00ca0] mmal_xsplitter vout display error: Failed to open Xsplitter:opengles2 module [aab014b0] xcb generic error: window not available [aab00ca0] mmal_xsplitter vout display error: Failed to open Xsplitter:xcb_x11 module

@mitu good day!
I was testing some mame video snaps on retropie.
Im well aware of the new default being VLC and that retropie is moving away from omxplayer.

On my system, video snaps from same source, some play ok some other not. They produce the blackscreen as per this post.

In VLC settings ffmpeg HW acceleration is disabled in codecs section. I cant find yet what is VLC missing and cant paly these files.

This is on a pi4 2GB model with latest updates and retropie.

For testing im providing this small 900KB argus.mp4 video snap
https://mega.nz/folder/2HAxmYJR#nNsMz6pZDkn1T36ASe5ZCg

I have on my system also installed the MPV. This one works great on all problematic video snaps.
VLC requires re-encoding of the files to work ok

ae13d584-3e56-48cc-9d12-2257fd6ddd05-image.png

Here is my testing from command line
MPV

mpv ~/RetroPie/roms/trackball/snaps/argusg.mp4 Playing: /home/pi/RetroPie/roms/trackball/snaps/argusg.mp4 (+) Video --vid=1 (*) (h264 256x240 29.970fps) (+) Audio --aid=1 (*) (aac 2ch 48000Hz) File tags: Artist: Progetto VideoSnaps by motoschifo & AntoPISA [gameplay by motoschifo] Comment: Created with: Mame version 0.161, Played by: motoschifo, Game name: argusg - Argus (Gottlieb, prototype), Date game played: 23 maggio 2015, Date video creation: 2 novembre 2015, Type: shortplay single-screen, Manufacturer: Gottlieb, Display resolution: 256x240px, Link for info: http://adb.arcadeitalia.net/?mame=argusg, Copyright (C) - All rights reserved - Tutti i marchi e loghi appartengono ai rispettivi proprietari Genre: MAME video preview (shortplay) Title: Argus (Gottlieb, prototype) [MAME] [vo/sdl] Using opengl [autoconvert] Converting yuv444p -> yuv420p AO: [pulse] 48000Hz stereo 2ch float VO: [sdl] 256x240 => 320x240 yuv420p AV: 00:00:37 / 00:00:37 (99%) A-V: 0.000 Exiting... (End of file)

VLC

vlc ~/RetroPie/roms/trackball/snaps/argusg.mp4 VLC media player 3.0.12 Vetinari (revision 1.0.6-1618-g917488b78) [0152e490] main interface error: no suitable interface module [014a5b58] main libvlc error: interface "globalhotkeys,none" initialization failed [014a5b58] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [0152e490] skins2 interface error: cannot initialize OSFactory [0152e490] [cli] lua interface: Listening on host "*console". VLC media player 3.0.12 Vetinari Command Line Interface initialized. Type `help' for help. > [a026ea18] mmal_codec decoder: VCSM init succeeded: CMA [a026ea18] main decoder error: buffer deadlock prevented

And running the re-encoded (as per above) video snap, which now vlc can play OK!

vlc argusg.mp4 VLC media player 3.0.12 Vetinari (revision 1.0.6-1618-g917488b78) [00f0b2e8] main interface error: no suitable interface module [00e81b58] main libvlc error: interface "globalhotkeys,none" initialization failed [00e81b58] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [00f0b2e8] skins2 interface error: cannot initialize OSFactory [00f0b2e8] [cli] lua interface: Listening on host "*console". VLC media player 3.0.12 Vetinari Command Line Interface initialized. Type `help' for help. > [a025f258] mmal_codec decoder: VCSM init succeeded: CMA [a2701f88] gles2 generic error: parent window not available [a27027d0] mmal_xsplitter vout display error: Failed to open Xsplitter:opengles2 module [a2701f88] xcb generic error: window not available [a27027d0] mmal_xsplitter vout display error: Failed to open Xsplitter:xcb_x11 module

Also Im providing MediaInfo fro both files:

8f5ad46f-3da2-4c4b-9630-95b9a86a37e6-image.png

8e3c3e57-849b-4242-80c9-6862ccd503eb-image.png

0299c00d-adeb-42c1-a709-7c1c22d05ca6-image.png

i updated and my snaps turned blue... omxplayer is not an option for me because it forces the video to be infront of the background...

I've encountered this problem myself.
All you have to do is remove the dependencies for vlc

Package is removed on my 17.10 Ubuntu - need to update the module to change dependency to just vlc. Should be ok on 17.04 though - you definitely not using the latest beta of Ubuntu?