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Firewire bandwidth
by Kai Nagel on Jul 22, 2009 at 9:56:58 pm

Hi,

I've a question about the V4HD bandwidth usage. The Firewire port offers a maximum of 800 MBit/s. If I calculated right a 10Bit 1080i30 video needs a bitrate of about 1250 MBit/s. We'll have to add the audio datarate to this value.

It is obvious that the V4HD uses some sort of compression before sending the data over the bus. Prores doesn't seem to be supported in hardware. So does anyone have an idea what is going over the Firewire bus? How hard is the compression?

One possibility would be, that everything is converted to DVCProHD, sent over the bus and then converted to Prores on the Mac. But we would loose the full raster then.

Does anyone know?

Thx

Kai Nagel


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  • Firewire bandwidth by Kai Nagel on Jul 22, 2009 at 9:56:58 pm


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