View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001267||DCP-o-matic||[All Projects] Bugs||public||2018-04-05 15:45||2019-11-20 11:58|
|Priority||normal||Severity||minor||Reproducibility||have not tried|
|Target Version||Fixed in Version|
|Summary||0001267: Investigate problems around 250Mbit/s|
Not sure if I've checked that DCP-o-matic doesn't go over 250Mbit when you ask it for 250... worth checking if we can legitimately blame servers for problems at high bit rates.
|Tags||No tags attached.|
|Estimated weeks required|
|Estimated work required||Unknown|
There is probably something to investigate - in 'earlier times' I did some compression tests with 2k and 4k noise patterns. I just recreated such a 4k noise pattern in Photoshop, and did some compression tests with DCP-o-matic 2.12.4. This pattern is very complex and brings every common compressor to it's knees.
2k - 125Mbit/s-24fps: 156MByte/124MBIt/s
The standard size of 312MByte at 250MBit/s/24fps/2k computes to 249MBit/s - nice one.
It's a bit strange (though at least safe) that the 4k/24/500MBit/s doesn't nearly reach the target size, but the 48fps version does.
Hmm, interesting, I just tried it with the same image in DCP-o-matic 1.83.0 (YES!!!!), and it creates a 625MB file (10s-4k/24fps/500MBit). That computes to...
|2018-04-05 15:45||carl||New Issue|
|2018-04-16 14:33||Carsten||Note Added: 0002374|
|2018-04-16 15:15||Carsten||Note Edited: 0002374||View Revisions|
|2018-04-16 15:24||Carsten||Note Edited: 0002374||View Revisions|
|2018-04-16 19:01||Carsten||Note Edited: 0002374||View Revisions|
|2019-11-20 11:58||carl||Relationship added||related to 0001664|