650D Raw_Rec port?

Started by VectorZ, May 19, 2013, 08:56:57 PM

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VectorZ

Supposedly 650D has UHS-I card support so it may be a good target for high speed recording?

moomilk

 It's now like 650D vs 50D for the basic RAW HD video DSLR camera - faster CF (133Mb/s) and larger buffer size may outweigh the CPU difference, also I've read somewhere here that 650D controller tops near the 40Mb\s - that will limit maxres under 720p.

5D mark II will hopefully settle at stable 24/1080p so we could conclude that DIGIC 4 is enough for RAW HD video = good news for 50D.))

nanomad

Already working :D
1280x560 is what you can shoot at 24p
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

CFP

Quote from: nanomad on May 19, 2013, 09:56:44 PM
Already working :D
1280x560 is what you can shoot at 24p
On 650D? Nice!

Edit: 1280 X 560 at 24 fps is only 30 Megabyte/s. 1280 X 720 is 39 ... But it doesn't work?
What's the max write speed of the 650D (Benchmark)? I'm just curious.

Quote from: moomilk on May 19, 2013, 09:56:11 PM
5D mark II will hopefully settle at stable 24/1080p so we could conclude that DIGIC 4 is enough for RAW HD video = good news for 50D.))
According to A1ex the CPU doesn't matter. He said that the "secret ingredient" for RAW video is zero CPU usage ;)
It's all about write speed. And I think the 50D will win this contest.

moomilk

Quote from: CFP on May 19, 2013, 10:12:18 PM
According to A1ex the CPU doesn't matter. He said that the "secret ingredient" for RAW video is zero CPU usage ;)
It's all about write speed. And I think the 50D will win this contest.
That is good to hear, then lets wait for the 50D update, as it might become a great entry level APS-C RAW HD video alternative to 5D mkII

1%

High CPU usage can lower throughput of memcpy and all that stuff.. cpu speed doesn't really matter.

nanomad

Quote from: CFP on May 19, 2013, 10:12:18 PM
On 650D? Nice!

Edit: 1280 X 560 at 24 fps is only 30 Megabyte/s. 1280 X 720 is 39 ... But it doesn't work?
What's the max write speed of the 650D (Benchmark)? I'm just curious.

The write speed is around 41MB/s outside LV and around 30 in Live View.
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5