If an MP4 file contains a VLC incompatible video codec, it will fail to play in VLC. Situation 3: The MP4 video codec problem! MP4 is a container video format which may contain number of audio, video, and even subtitle streams. Then set the Output drop-down menu to X11 video output (XCB) and save the changes and restart your VLC Player for the changes to come effective. Then Check the box for Window decorations, if it is un-clicked. Go to Video section and enable Video, in case it is un-clicked. Open VLC, go to Tools, and click on Preferences. Solution: In this condition, all you need is to configure X Server correctly. Situation 2: May be VLC 'video output modes' is set wrong. All you need is to download the correct MP4 Video, which is not corrupt and which may be working fine. Solution: There is no solution considering the VLC Aspects. Situation 1: May be the MP4 Video is corrupt or fake Plays audio OK, but video is blank/purple.' Why MP4 Not Playing in VLC & Quick Solutions:

'When adding MP4 video to VLC, I noted that it wouldn't play my mp4 files. While, there are still groups of people complain of the imported with low video quality or incapability of video playback. Generally, VLC supports MP4 format files as source. This guide provides a walkthrough to help you play MP4 in VLC freely without hassle. However, when playing some common video files like MP4 in VLC, there are still many issues troubled guys. VLC media player is the most successful free open source cross-platform multimedia player in Windows, Linux, Mac OS X and framework that plays most multimedia files as well as DVD, Audio CD, VCD, and various streaming protocols. Tricks Playing MP4 in VLC Media Player Flawlessly

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