Pro video cameras record video in various bit rates such as 25mbps, 35mbps, 50mbps so on. What is original Canon video bit rate? i.e 60D
In ML CBR mode what the adjustments [-16...+16] point to in terms of mbps. Also is there a simple software to analyse video bit rate etc.
Camera uses a VBR encoder, so the bitrate varies with the complexity of the scene
OK, since there is not going to be a fixed bitrate on Canon like the video cameras it is not important in my case to mess around with the bitrate function. Images out of 60D is already great. Many thanx for the reply.
Digic IV encoders encode based on QP value set via predicting the size of the next frame.
Digic V encoders encode based on fixed QP or target bit rate (which just changes QP).
There is no way to do real CBR because your scene will always be different, even to the point where camera cannot process encoding the scene at fixed quality and stops.
You can check out what its doing with bit rate viewer or avinaptic. Default rates will have high (low quality) QPs.
Excellent, thanx.
Here is some tests I made for those interested in bitrate subject. I downloaded Mediainfo which is a great tool. And tested some video footage as follows:
Canon 60D 1920x1080 25fr color space 4.2.0 overall bitrate 45.8 Mbps
720x1280 50fr color space 4.2.0 overall bitrate 47.3 Mbps
Nikon 5100 720x1280 50fr color space 4.2.0 overall bitrate 12 Mbps ( poor Nik)
Lets remember HDV is 25 Mbps, full HD minimum broadcast requirement is 35 Mbps, BBC broadcast requirement is 50 Mbps (color space 4.2.2)
All these figures make Canon a winner at 45.8 Mbps very close to 50. :)
It can go a bit higher than that.
Quote from: Lumiére on January 12, 2013, 06:22:16 PM
720x1080 50fr color space 4.2.0 overall bitrate 47.3 Mbps
Nikon 5100 720x1080 50fr color space 4.2.0 overall bitrate 12 Mbps ( poor Nik)
720x1080? What kind of aspect ratio is that... taller video than it is wide by 360 pixels?
Maybe you mean 1280x720?
Sorry its 1280x720 of course. Just my typing error. Its been corrected.