Avermedia Game broadcaster HD C127

Did you do a search...? http://www.avsforum.com/avs-vb/showthread.php?t=1378087

Mine arrived yesterday and I quickly noticed a problem: even when input is 1080p59.94 like the Xbox 360 outputs, the captured frame rate is 1080p30.00. Instead of just taking all even frames or all odd frames from the source, it takes one of them, let's say even - then 492 frames later it starts taking them from odd, then 492 frames after that from even again (in other words 1 additional frame every 16.4 seconds).

When playing a 1080p29.97 video (or frame-locked game) on a 1080p59.94 device, there will be a duplicate frame every 32.8 seconds as a result.

Does this have the same colour space issues/clipped supers of the C027? Is colour reproduction actually accurate this time?

Secondly, is it definitely locked to 30FPS at 1080p? What happens when you select 29.97 in, say, VirtualDub?

Oh, and does it come with a half-height bracket?

What should I do to test this? I have S&M and AVS HD 709.


The Capture Pin can't be set higher than 29.970 at 1920x1080, but it still captures 30 anyway.

VDub's capture rate indicator is never exact for me, but you can see it hovers around 30.




Yes.

Thanks for the info.

In terms of judging the colour, this is pretty straightforward. Maybe just use your PC's DVI output and produce a 1080p equivalent to this shot of the pattern running on PS3?

Colour reproduction is very close what it should be on PS3, and a simple histogram comparison will tell us what we need to know!

If I understand this right, the unit doesn't have an on-board H.264 encoder like the Colossus. What was Avermedia smoking? I think users' computers are going to be pretty taxed with 1080p30 real time encoding.. particularly if they are not taking advantage of something like QuickSync in the latest SNB CPUs...

I've encoded 720p60 h.264 at CRF23 simultaneously with 192kbps MP3 audio on a Core 2 Duo laptop running at 2.5GHz using x264vfw and LAME - and that's real-time capture! I've even done 720x480 at 30fps with MP3 audio encoding in real-time on a single core 1.6GHz Intel Atom!

The quality of software encoding annihilates anything a cheapo hardware encoder chip can do - x264 rocks.

Having access to an uncompressed DirectShow input is of far more value than a visually compromised image that you can only access with bespoke (often lacking) tools!

Of course, x264 rocks, and I am not saying having uncompressed input is not good.. but, to be able to do that real time Full HD encoding, I bet the parameters being used are pretty much not going to be able to expose the real power of x264 (which works really great in two-pass mode).

If FullHD encoding with x264 in real time is possible, I am curious why there aren't 1080p60 clips out there recorded with BlackMagic Intensity Pro/Shuttle + x264 ; Till date, I haven't seen any software only solution for this (at consumer price points). I don't think real time CPU (software) encoding of 1080p60 streams will be easy.. It will have to be hardware accelerated (using Intel QuickSync or AMD VCE).

The main selling point of this unit seems to be 1080p60 input + 1080p30 capture. Give the user an encoder to capture the 1080p30 / 1080p60 compressed (and also direct uncompressed feed, if the user wants).

By the way, I am curious whether anyone has comparisons of real time captures with the H.264 encoder in Colossus and something of the same content at the same bitrate captured realtime with x264.

Intensity Shuttle doesn't actually support 1080p60 so you won't see those clips!

And for obvious reasons, two pass encoding can't be done in real-time. In actual fact most x264 GUIs now use CRF encoding instead of two-pass. CRF aims to encode every frame to the exact same quality level, so bandwidth adjusts dynamically, and often radically, depending on what it has to compress.

This is the kind of flexibility that a hardware encoder simply cannot match. Every cheapo hardware encoder I've seen essentially seems to be CBR based to all intents and purposes. The last one I looked at in Avermedia's Game Capture HD was extremely basic and produced icky results.

Oddly enough, Digital Foundry's screenshot of that pattern is in the wrong colorspace. I can only make it look like theirs by using Rec.601 conversion on the MP4.

Here it is with FFVideoSource compared to PS3 YCbCr playback into the two capture cards, using Ut Video. All three were expanded using Rec.709 in Avisynth. I still don't know what problem we're looking for though.

FFVideoSource -vs- C027 1920x1080i -vs- C127 1920x1080p



Hey Ganesh, do you have access to the Colossus? I'd happily provide matching clips with the AVerMedia card(s).

Yes, I have access to the Colossus, though it is currently not hooked up to any of my testbeds. The issue is, I don't have any game consoles

We have to agree on having the same source playing the same content... Are you aware of any HDMI sources without HDCP that can play back arbitrary local media files?

WD TV Live, maybe its variants too (only engages HDCP when streaming something like Netflix). For content, a Big Buck Bunny encode or that other free movie? Or just some decrypted Blu-ray clips if we both have some same discs.

So this device is exposed as a DirectShow capture filter?

GraphEdit screen capture attached. The source filters are listed under WDM Streaming.

Thanks. Is NV12 an option for colorspace output?

Only 4:2:2 - the dropdown has YUY2, YVYU, UYVY.

For anyone interested, I posted extensive details on their forum regarding 1080p59.94 being captured incorrectly at 1080p30 instead of 1080p29.97. Their response was simply this:


Of course that doesn't explain why the Capture Pin I showed above does indeed say 29.970.

Does the software have a screenshot feature? If so, can it rapidly save shots in PNG or some other lossless format, with numeric filenames?

I have a special mouse rigged to click about 6 times per second for doing uncompressed screencaps. (It works with my Blackmagic Intensity, but that only goes up to 1080i60, so I'm hoping the Game Broadcaster can allow me to do the same in 1080p60.)

Thanks...

The software supports PNG and sequential auto-capture but the smallest interval is 1 second. You may be able to get 2 or 3 per second with fast clicking but it doesn't respond quickly enough for 6.

The screenshots are taken as unexpanded full-range so you would need to set your input devices accordingly. Confusingly, the video preview in the app expands limited-range input. What you see displayed and what you see in the screenshot will be different.

Hello guys,

I have a problem with recording from Intel HD 3000 graphics HDMI output. When I set the resolution of attached monitor (Game Broadcaster HD virtual monitor) to 720p and resolution 720p for recording video in MediaCenter 3D software, MediaCenter is upscaling it to 1080p and then shrinking back to 720p apparently. You can see it on video of static text which is not nice clean but most importantly when I make screenshot in MediaCenter it is 1080p image.

I am using Windows 7 64-bit on some Asus board with Core i7-2600K and I am capturing the ouput of the graphics on the same computer, but I guess it should not be reason for this problem.

Is it known problem or any idea?

Thanks.

so let me get this straight - one can still not capture 1080p ps3 gameplay via HDMI ?