C300: Is Canon 1DC "Motion Jpeg" broadcast approved???

[Nicholas Natteau]

Not sure if this question was answered already, but is Canon 1DC's 4K Motion Jpeg broadcast approved???

I know for example that the BBC's minimum broadcast requirement is 50 Mbps, but never having used the 1DC I don't know the data rate of 4K Motion Jpeg.

Thank you in advance.

 

[cowpunk52]

I believe that BBC requires a minimum of 100Mbps data-rate for intra-frame codecs (50Mpbs for inter-frame) and 4:2:2 color sampling for HD broadcast, so it should meet the requirements - at least, on paper. I'm certain the Beeb will run it's own testing to determine whether it makes the cut.

 

[Shawnvfx]

i believe 1dc is 8 bit 4:2:0 if not wrong.

 

[Stephen Mick]

i believe 1dc is 8 bit 4:2:0 if not wrong.

The 1080 modes on the 1DC are 8-Bit 4:2:0. But the 4K Motion JPEG is 8-Bit 4:2:2.

 

[KINOKS]

The 1080 modes on the 1DC are 8-Bit 4:2:0. But the 4K Motion JPEG is 8-Bit 4:2:2.

Can anybody explain what happens to the chorma res when the image gets downscaled to HD?

 

[Nicholas Natteau]

If the 1DC shoots at 4GB per minute, or 1GB every 15 seconds, wouldn't that mean that it shoots at a data rate 66 Mbps (1000/15 = 66.66)???

So if it is 66Mbps at 4K, is it then broadcast approved?

 

[atarijedi]

If the 1DC shoots at 4GB per minute, or 1GB every 15 seconds, wouldn't that mean that it shoots at a data rate 66 Mbps (1000/15 = 66.66)???

So if it is 66Mbps at 4K, is it then broadcast approved?

The 4k is recorded at 8bit 4:2:2 500Mbps, a 32GB card will only last ~8min.

 

[Nicholas Natteau]

Hi atarijedi. If it's 500Mbps though wouldn't that mean 500 x 60sec = 30GB/min?

 

[Nicholas Natteau]

OK I think I see my mistake. Megabyte (MB) being 8,000,000 bits and Megabit (Mb) being 1,000,000 bits.
So that would mean 500 (Mb) / 8 = 62.5 (MB) x 60 = 3,750 MB or 3.750 GB / min. Does that sound right?

In which case - 500 Mbps - has to be broadcast approved.

 

[atarijedi]

OK I think I see my mistake. Megabyte (MB) being 8,000,000 bits and Megabit (Mb) being 1,000,000 bits.
So that would mean 500 (Mb) / 8 = 62.5 (MB) x 60 = 3,750 MB or 3.750 GB / min. Does that sound right?

In which case - 500 Mbps - has to be broadcast approved.

That sounds about right. I don't doubt it will be broadcast approved, but places like the BBC have to purchase one and then put it through a testing process before they okay it.