Uses ffmpeg libraries to provide video encoding of an osg::GraphicsContext
(which could be for Flightgear's main window) to file.
The video codec is specified as a string at runtime. Success depends on what is
supported by the system's ffmpeg installation.
Handling of resize doesn't always work. We finish current stream and create a
new encoder and continue. Works ok with mpeg2, but with more modern codecs vlc
usually fails to handle the change.
We call the encoder on a separate thread to avoid latency.
If SG_FFMPEG is not defined, we don't make calls to ffmpeg libraries and
VideoEncoder class's constructor always throws an exception.
Julian Smith
5627b135b4