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Re: OpenCV VideoWriter Raspberry Pi
Be careful with MJPEG for recording on an embedded arm device. MJPEG is bitrate hungry and ranges anywhere from 10x to 20x larger than something like h264 or v8. This can easily saturate your SD card's throughput.
WebM might be an option. Another possibility is to use the v4l2-loopback and gstreamer to record locally with x264 in a separate thread, while having your vision processing run on a forked stream.
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