Realtime WM9 encoder cards at DVinfo.net

Frederic Segard · October 4th, 2003, 06:56 AM

I need to produce Windows Media 9 HD content (1280x720). It will be a mix of 16:9 footage (quite possibly from a GR-HD10U), and 3D computer animation. The quality of the 3D animation (1280x720 30p) is of extreme importance. Not only that, but I would like to encode it in real-time and the encoded material must be pristine. I know that Digital-Rapids and Osprey make cards, but I’m not sure they support HD content. The encoding has to support file based sources. As a frame of reference, I wonder what hardware do Landmark Theaters use?

Fred

Robert Knecht Schmidt · October 4th, 2003, 07:23 AM

This link might be of help, especially the section headed "Integrated Capture/Encoding Solutions and Appliances."

http://www.microsoft.com/windows/win...e/default.aspx

Though I believe the DCS systems installed in Landmark theaters use AMD Opteron processors. Not sure whether they have a need for real-time encoding on the fly like you do, as Landmark's interest is in distribution and not creation of content...

Dave Largent · October 4th, 2003, 09:58 PM

Hi Fred,
By "real time" do you mean that, for example, you're looking for something that would encode 1 minute of HD footage to WM9 and that this conversion would be completed in 60 seconds? If this is what you seek, I don't think there is such a thing. I've been experimenting a bit with encoding uncompressed HD to WM9.
Here are the results I came up with using a P4 2.4 GHz machine with 750 MB of RDRAM to convert 1 minute uncompressed HD to WM9 using Microsoft's free encoder.
The first number is the "quality" (in Mbps). Tha second number is the resultant "file size" (in MB). The third number is "how long it would take" (in minutes).

0.5 Mbps ** 0.9 MB ** 45 minutes
1 ** 10 ** 46
3 ** 28 ** 54
5 ** 40 ** 63
6 ** 58 ** 54
7 ** 80 ** 58
9 ** 100 ** 60
15 ** 150 ** 70
20 ** 180 ** 68

Above 9 Mbps, I didn't notice much, if any, improvement in image quality. The minimum you could go is about 6 - 6.5 Mbps.
The best balance between image quality and file size seemed to be at about 7 Mbps. From looking at comparisons of different chips' encoding times, I would think that the best result I could get by using the fastest CPU out right now would be to cut these encode times by 1/3. So say 1 minute now takes 1 hour, the fastest CPU could get it down to 40 minutes. So even at the 40 minutes time for 1 minute HD, for 1 hour of uncompressed HD encoded to WM9, you'd be looking at 40 hours.
I'd welcome others' thoughts on this.
Dave
P.S. With my current 2.4 GHz CPU, 1 hour of HD encoded to WM9 would take 2 1/2 days straight!

October 4th, 2003, 06:56 AM	#1
Frederic Segard Major Player Join Date: Jul 2003 Location: Montreal, Canada Posts: 209	Realtime WM9 encoder cards I need to produce Windows Media 9 HD content (1280x720). It will be a mix of 16:9 footage (quite possibly from a GR-HD10U), and 3D computer animation. The quality of the 3D animation (1280x720 30p) is of extreme importance. Not only that, but I would like to encode it in real-time and the encoded material must be pristine. I know that Digital-Rapids and Osprey make cards, but I’m not sure they support HD content. The encoding has to support file based sources. As a frame of reference, I wonder what hardware do Landmark Theaters use? Fred

October 4th, 2003, 07:23 AM	#2
Robert Knecht Schmidt Wrangler Join Date: Feb 2002 Location: Cleveland, Ohio Posts: 1,933	This link might be of help, especially the section headed "Integrated Capture/Encoding Solutions and Appliances." http://www.microsoft.com/windows/win...e/default.aspx Though I believe the DCS systems installed in Landmark theaters use AMD Opteron processors. Not sure whether they have a need for real-time encoding on the fly like you do, as Landmark's interest is in distribution and not creation of content... __________________ All the best, Robert K S Search DVinfo.net for quick answers \| The best in the business: DVinfo.net sponsors

October 4th, 2003, 09:58 PM	#3
Dave Largent Trustee Join Date: Aug 2003 Posts: 1,483	Hi Fred, By "real time" do you mean that, for example, you're looking for something that would encode 1 minute of HD footage to WM9 and that this conversion would be completed in 60 seconds? If this is what you seek, I don't think there is such a thing. I've been experimenting a bit with encoding uncompressed HD to WM9. Here are the results I came up with using a P4 2.4 GHz machine with 750 MB of RDRAM to convert 1 minute uncompressed HD to WM9 using Microsoft's free encoder. The first number is the "quality" (in Mbps). Tha second number is the resultant "file size" (in MB). The third number is "how long it would take" (in minutes). 0.5 Mbps 0.9 MB 45 minutes 1 10 46 3 28 54 5 40 63 6 58 54 7 80 58 9 100 60 15 150 70 20 180 68 Above 9 Mbps, I didn't notice much, if any, improvement in image quality. The minimum you could go is about 6 - 6.5 Mbps. The best balance between image quality and file size seemed to be at about 7 Mbps. From looking at comparisons of different chips' encoding times, I would think that the best result I could get by using the fastest CPU out right now would be to cut these encode times by 1/3. So say 1 minute now takes 1 hour, the fastest CPU could get it down to 40 minutes. So even at the 40 minutes time for 1 minute HD, for 1 hour of uncompressed HD encoded to WM9, you'd be looking at 40 hours. I'd welcome others' thoughts on this. Dave P.S. With my current 2.4 GHz CPU, 1 hour of HD encoded to WM9 would take 2 1/2 days straight!