[mdlug] Raspberry Pinewood Derby

[Ingles, Raymond]

> From: Ingles, Raymond

> Storing to a RAM disk, to free up USB bandwidth, would probably allow 120fps (~18MB/sec).

Well, I tried it a few days ago, and no dice. I set up a ramdisk (well, technically, a tmpfs filesystem, but same diff), and tried dumping the video there.

Sadly, if I configured the camera for 90fps, I still saw wildly varying framerates, never more than about 85fps. If I configured for 120fps, I got no video at all. Ffmpeg didn't give errors, but never actually produced any video either. I think 75fps is the best I can hope for out of the Pi. In theory, their camera board may next year be capable of 90fps (at 640x480, even) but at that point I'll probably just bring a 'real' computer along, or put together a circuit or two.

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