Good day
I have quite a few H264 / MPEG4 AVC video files that will show this anomaly in VLC where always at the same places in the video regularly repeating, blotches will appear against a background area of generally the same colour. In other words; blotches usually lighter than the background on which they appear. And the backgrounds on which they appear will usually be of the same gradient of colour, for instance a wall in a room and usually it will happen more (or I will notice it easier) on backgrounds with darker colours. The blotches appear slowly and very subtly and then become more prominent, then suddenly disappear. This all happens in a matter of seconds, then start to repeat a few seconds later. You can close the video file and VLC and open it again and go to the exact time where you saw it appear and they will again appear exactly in the very same manner that they did in the previous session.
I have tested the same video files on Windows XP SP2 and Windows 7 SP1 and the blotches are exactly the same. I have also tested it on different VLC versions starting from 2.0.6 going down at different version releases and they all do it except for version 1.0.5. I have not tested it on an earlier version than 1.0.5. The next version up from there which I tested was 1.1.3 and that also had the blotches. I also tried different output methods (DirectX, OpenGL) but both had the blotches. I also tried two different NVidia drivers and both had the issue.
I then tried MPC-HC and that did not have the blotches
I then tried it on another PC with WinXP and that machine also had the blotches.
My PC has a NVidia 250GTS and the other PC has a NVidia 5500 screen card
Please have a look at the attached screenshot of the blotches in VLC and a screenshot of the same video in MPC-HC which did not have the blotches.
Attachment 17704
Attachment 17703
Is there a setting which will stop this from happening or is this a VLC issue?
Thank you for your time
I have quite a few H264 / MPEG4 AVC video files that will show this anomaly in VLC where always at the same places in the video regularly repeating, blotches will appear against a background area of generally the same colour. In other words; blotches usually lighter than the background on which they appear. And the backgrounds on which they appear will usually be of the same gradient of colour, for instance a wall in a room and usually it will happen more (or I will notice it easier) on backgrounds with darker colours. The blotches appear slowly and very subtly and then become more prominent, then suddenly disappear. This all happens in a matter of seconds, then start to repeat a few seconds later. You can close the video file and VLC and open it again and go to the exact time where you saw it appear and they will again appear exactly in the very same manner that they did in the previous session.
I have tested the same video files on Windows XP SP2 and Windows 7 SP1 and the blotches are exactly the same. I have also tested it on different VLC versions starting from 2.0.6 going down at different version releases and they all do it except for version 1.0.5. I have not tested it on an earlier version than 1.0.5. The next version up from there which I tested was 1.1.3 and that also had the blotches. I also tried different output methods (DirectX, OpenGL) but both had the blotches. I also tried two different NVidia drivers and both had the issue.
I then tried MPC-HC and that did not have the blotches
I then tried it on another PC with WinXP and that machine also had the blotches.
My PC has a NVidia 250GTS and the other PC has a NVidia 5500 screen card
Please have a look at the attached screenshot of the blotches in VLC and a screenshot of the same video in MPC-HC which did not have the blotches.
Attachment 17704
Attachment 17703
Is there a setting which will stop this from happening or is this a VLC issue?
Thank you for your time