Difference between revisions of "XDCAM Space Requirements"
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| − | Bitrates and space requirements for XDCAM footage can be found in this [[Xdcam spacereq.pdf|PDF]].<br> | + | Bitrates and space requirements for XDCAM footage can be found in this [[media:Xdcam spacereq.pdf|PDF]].<br> |
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Revision as of 09:00, 25 January 2012
Bitrates and space requirements for XDCAM footage can be found in this PDF.
| |
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 |
500 MB |
345 MB |
263 MB |
270 MB |
| 2 Minutes |
1 GB |
690 MB |
527 MB |
540 MB |
| 10 Minutes |
5 GB |
3.5 GB |
2.7 GB |
2.7 GB |
| 30 Minutes |
16 GB |
10.5 GB |
8 GB |
8 GB |
| 1 Hour |
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 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 two-thirds the bandwidth of (4:4:4) R'G'B'. This reduction results in almost no visual difference as perceived by the viewer.
