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I think found an issue with the 1.0.1 player.

If the player is launched using OpenGL the command line parameter video-x doesn't work

The following command always ignores the video-x command

vlc dshow:// --dshow-vdev="ATI TV Wonder 600 USB 2.0" --dshow-adev="WDM 2883 Audio" --dshow-size=640x480 --dshow-tuner-channel=3 --dshow-tuner-country=1 --dshow-tuner-input=1 --volume=100 --width=640 --height=480 --video-x=500 --video-y=10 --no-qt-updates-notif --no-video-title-show --qt-display-mode=2 --one-instance --no-qt-system-tray --no-embedded-video --no-video-deco --video-on-top --aspect-ratio=640:480 --autoscale --vout-filter deinterlace --deinterlace-mode blend

The following command always ignores the video-x command

But not --video-y ?

Yes. I am sorry. It appears --video-y is giving me issues too

Command
vlc dshow:// --dshow-vdev="PCTV DiB BDA Analog Capture (Dev1 Path2)" --dshow-adev="None" --dshow-size=720x480 --dshow-tuner-channel=3 --dshow-tuner-country=1 --dshow-tuner-input=1 --volume=100 --width=640 --height=480 --video-x=100 --video-y=500 --no-qt-updates-notif --no-video-title-show --qt-display-mode=2 --one-instance --no-qt-system-tray --no-embedded-video --no-video-deco --video-on-top --aspect-ratio=320:240 --autoscale

Snapshot
https://www.box.net/shared/static/195nn5oqtm.jpg

Here is a screen shot after I reset the preferences

Command
vlc dshow:// --dshow-vdev="PCTV DiB BDA Analog Capture (Dev1 Path2)" --dshow-adev="None" --dshow-tuner-channel=3 --dshow-tuner-input=1 --volume=100 --video-x=100 --video-y=25 --width=640 --height=480 --no-qt-updates-notif --no-video-title-show --qt-display-mode=2 --one-instance --no-qt-system-tray --no-embedded-video --no-video-deco --video-on-top --autoscale

Snapshot
https://www.box.net/shared/static/6u5961fyvo.jpg

This could be the root of the problem.

I am launch the VLC via a C# program. To avoid two windows I make the "control" window invisible. Is the positioning of the borderless frame defendant on the control window?

Sample Code
Process procVLC = new Process();
procVLC.StartInfo.FileName = _vlcPath;
:
procVLC.StartInfo.Arguments = args;
procVLC.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
procVLC.Start();

Strike that. I tried without making the control window invisible.

The borderless window always start in the upper left hand corner if using OpenGL