Glad the links helped
Pytkin wrote:Dont forget , to encode/record 3-4 streams at one computer U need lot of CPU power .. or record uncompressed video , then U need very quick storage (SSD is very quick , but small) .. May be PRORES is OK .. I was never tested more feeds to encode/capture at one MAC PRO ..
If you have a MacPro and want to capture 3-4 streams, as suggested the quadlink is probably your best option. However you will need plenty of RAM and if you don't already have a RAID operating on the MacPro, you will need some sort of external device.
I have captured 2 stream to a MacPro previously (Decklink SDI and Multibridge Express). Was set up with a RAID 1 for 2 drives for the operating system and RAID 0 for the other 2 drives for the capture. Also had 12 cores and 32GB RAM. Each stream was captured to a different folder; it does not work if you capture to the same one. Worked pretty well but that was also on an older MacPro (2009). So technically can be done but will need to almost max out the MacPro. Was not using ProRes but was doing real time compression from Apple Intermediate. can't remember what I was compressing it to!
Also had the machine running Parallels and using it for internet sharing. Had 2 graphics cards in it pushing out 4 screens (For a pro level sport setting for a team)and was using Apple Remote Desktop into it as well to control it. Was also doing file transfer by AFP and to firewire/USB drives. Did find that I had to manage the loads of file transfers or there were issues!
Willdewitt wrote:I don't know what your position is in the church but I find I get requests all the time from people that don't realize the costs involved with their "simple" request. As a side note you should also ask any non blackmagic questions you wind up with over on churchtechleaders.org
If you can capture on each individual camera, probably a much better option for backup.
If you do still want to capture the 3-4 streams, unless you get a windows tower that is highly specd in terms of RAM, RAID, processor etc, for a mac version you would probably be best with 1 mac mini per stream, fusion drive, i7 processors, max RAM. All networked so you can control the capture start/stop
As stated, by other think this is overkill