I am using PI4 with raspbian buster. While I am playing videos on VLC the screen sometimes blink. The blinking interval is random. Is it normal or is there a problem that is needed to be fixed?

  • Is Raspbian fully updated? What file are you playing? – CoderMike Oct 12 '19 at 19:47
  • Raspberry pi is fully upgraded. I am playing a movie. An mp4 file – Sohan Arafat Oct 12 '19 at 19:49
  • What happens if you use omxplayer? – CoderMike Oct 12 '19 at 20:27
  • Never used it. Don't know. VLC is easy to use. So I am searching for a solution – Sohan Arafat Oct 12 '19 at 20:31
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    Maybe a screen recording would help find a solution. – Botspot Oct 14 '19 at 22:46

I also use VLC on the latest Buster and RPi4. I remember getting some screen blinking when I used a crappy HDMI cable which I have since replaced. One easy test you can do is changing the screen resolution to a lower one, e.g. 1280x720. You can do this e.g. by editing /boot/config.txt, running raspi-config (those two require a reboot), by going to Application Menu > Preferences, or using command line by running sudo tvservice -e "CEA 4". If the blinking goes away or is substantially reduced, your problem is likely in the cable, and you should get a shorter one if possible, and from a shop those quality you trust.

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Sometimes, Screen flickering is attributed due to low power supply. Please check at the top right of your screen you will see a yellow thunder icon if that is the case.

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