Is it possible to grab the OpenGL stream with ffmpeg and save to a video file? If so, could anyone point in the right direction as to how to capture the stream opened by Gem?

The reason I ask this is that I am looking for ways to render video frames to a file and I have not managed a good result using neither [pix_record] nor [pix_writer]. 

With [pix_record] I have systematically tried all codecs and colorspaces and I had no luck.

With [pix_writer], I did manage high quality frames with the correct colorspace which I then concatenated into a video (with ffmpeg). The drawback I have with [pix_writer] is the time it takes to write, which really complicates audio and video synching. 

Thanks!!

Fede

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