XDCAM Space Requirements
From Help Wiki
Bitrates and space requirements for XDCAM footage can be found below and in this downloadable PDF.
| |
ProRes HQ |
ProRes Regular |
MPEG HD422 (50 Mb/sec) 4:2:2* best for chroma key! |
MPEG HD (HQ) (35 Mb/sec) 4:2:0* |
MPEG HD (SP) (25 Mb/sec) 4:2:0* |
DVCAM (25 Mb/sec) 4:1:1* |
| 1 Minute |
1.5 GB | 1 GB | 500 MB |
345 MB |
263 MB |
270 MB |
| 2 Minutes |
3 GB | 2 GB | 1 GB |
690 MB |
527 MB |
540 MB |
| 10 Minutes |
15 GB | 10 GB | 5 GB |
3.5 GB |
2.7 GB |
2.7 GB |
| 30 Minutes |
45 GB | 30 GB | 16 GB |
10.5 GB |
8 GB |
8 GB |
| 1 Hour |
90 GB | 60 GB | 32 GB |
21 GB |
16 GB |
16 GB |
| 23 GB Disc |
43 Minutes |
60 Minutes |
90 Minutes |
85 Minutes | ||
| 50 GB Disc |
95 Minutes |
145 Minutes |
190 Minutes |
185 Minutes |
- Chroma Subsampling Rationale:
Because of storage and transmission limitations, there is always a desire to reduce (or compress) the signal. Since the human visual system is much more sensitive to variations in brightness than color, a video system can be optimized by devoting more bandwidth to the luma component (usually denoted as 'Y' or first digit in the notation), than to the color difference components Cb and Cr. The 4:2:2 Y'CbCr scheme for example requires only two-thirds the bandwidth of (4:4:4) R'G'B'. This reduction results in almost no visual difference as perceived by the viewer.
