Video output modules in VLC #1841. Closed Hashmael opened this Issue Jun 8, 2015 0 comments. OpenGL GLX video output (XCB) X11 video output (XCB). The VideoLAN Forums. However, when I try to play video with the browser plugin, it doesn't seem to use 'X11 video output (XCB)' and, consequently. Why does VLC can't play.mp4 file videos? Then set the Output drop-down menu to X11 video output (XCB). X11 video output error: X11 request 2.0 failed with error code 3. Zte F660 Software. 19 Current serial number in output stream: 20 vlc: xcb_lock.c:33: _XCBUnlockDisplay.

• I'll get to about 1 hour and 50 minutes of a 3 hour long.mp4 video and the video will just stop, and it happens to all the videos I've downloaded. Is there a reason for this? • I am a fan of VLC so use it on most machines to play MP4 videos from my NAS. Tonight it has just stopped displaying the video. Could somebody point me how to solve this issue? • VLC will not play certain mp4 h264 files. Some h264 files work, others don't.

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