OpenCL GP Processor : Intel(R) HD Graphics 4000 (128SP 16C 350MHz/1.1GHz, 1.8GB DDR3 1.6GHz 128-bit, Integrated Graphics) Video Adapter : Intel(R) HD Graphics 4000 (16CU 128SP SM5.0 350MHz/1.1GHz, 1GB DDR3 1.6GHz 128-bit, Integrated Graphics) Model : Samsung Q470C/500P4C ChiefRiver System

Here are some potentially-relevant hardware/driver parameters: My PC runs Windows 8.1 it is this computer onto which I have installed and am running Avidemux 2.6.7 (64-bit). The *.MOV file is from an ~4-second video clip recorded on an iPhone 5S by the built-in Camera application/hardware. The dropbox value for the 'Video display' field was set to 'OpenGL (best)' by default I did not change that value. However, similar to the experience of Peter ( u=1508) described in, in the 'Video Filter Manager' Window, I see no 'Available Filters' in the middle Window when I click on 'OpenGL', even after checking 'Enable openGl support' on the 'Display' tab of the 'Preferences' Window under the 'Edit' menu. Information posted to this topic motivated me to download Avidemux and attempt to use it for my purposes.

I am neither a programmer nor knowledgeable about OpenGL, although I am a reasonably competent and knowledgeable user of Windows-based computer hardware/software/systems and iOS devices (specifically iPhone) and apps, and have some familiarity with media file formats (encodings/containers). I am attempting to rotate video in a *.MOV file by a custom angle (not a multiple of 90 degrees).

Rotate video in avidemux