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I have bought a lot of stuff, mostly electronic goods, both good and bad. After a while the bad stuff makes me wonder if it is the products or my computer setup that seems to make this stuff quirky and unreliable. I built my own setup and am not averse to trying shareware and other types of programs. I had the Hauppauge HD PVR for about a year and a half. It produced a great captured video. Problem was that it was not very reliable. It would "hang up" frequently for no decipherable reason that I could find. The scheduling software was OK, I did not have the WINTV 7.0 as that came out later, but it didn't much matter because half the time I had a program scheduled it would have locked up at some point and would not capture anyhow. Finally it got to the point where I had reloaded, formatted, my computer for this and other reasons to get a fresh start and hopefully fix the problem. I would load this first before other drivers, after the video driver, and a few other sequences. I don't mind redoing my drives as it gives me a chance to get rid of the junk that has accumulated over time. The Hauppauge never performed reliably no matter when the driver was loaded. Finally the last time I attempted this I ended up using the wrong AC adapter to plug in the Hauppauge got a burning smell from the PVR. Oh well I never cared for the thing anyhow. I did still want to capture video to the computer and did appreciate the high quality the Hauppauge put out. I did some research and finally decided on the Aver USB HD PVR. I hesitate to say this as it's only been a couple of weeks but what a godsend. It's been performing now and the only time it has locked up was once when I was doing something else with another program and must have affected it somehow. Video capture is of the same quality as the Hauppauge and it actually has a video for me when I get back on the computer and look to see if it is captured; every time so far! I've never written a review for anything that I have bought but have been so impressed with the operational difference between these two products that I just felt compelled to do so. Running AMD Phenom II X4 965 3.4GHz (Quad Core) 45nm, AM3 6MB Cache 8 MB Ram and an AMD Radeon 5700 series video card. Mostly do a lot of video editing. Running Win 7 SP1.
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I've been looking for a product that will allow me to copy some of the recordings I have on my AT&T Uverse DVR to my computer without losing any picture quality and this does the trick. I have my Uverse box set to output 720P and I hooked this device up using the included component video cable. I installed the drivers and software and I was able to play one of the shows I had on my Uverse DVR and save it to my computer. Of course this is all done in real time, so it takes however long the show is. When I played it back on the TV (form the computer) it looked as good as the original from when I play it from the DVR.Now I can free up space on my DVR without losing any shows that I want to keep.
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C874's capture quality is great, but the bundled capture app may needlessly burden low-end machines. There's a workaround which may help somewhat, so if interested, read on...The whole point of the USB external device is to offload encode and decode (to TV) functions from the computer. As shipped, the software requires more CPU/GPU than the USB device really needs to perform its built-in hardware functions. So they just increase the computer hardware requirements to use the product. Clever.
The C874 should include a lightweight tray-dwelling capture app with full hardware settings and NO preview function or a selectable minimal one.
It would also be useful if the device could downscale any video input and do lower framerates and bitrates. The SDK info on their site indicates the C874 can do this and more. Strange that it is not standard with the product.
An HDMI-out player that has a responsive slider navigation feature and low CPU/GPU overhead would be a main selling point of the product. Preview on the computer isn't required if the PVR is doing the decoding, but maybe subsampled keyframes could be shown with timecode for navigation. The ability to put up a still image or colorbars on the HDMI-out when a clip isn't playing, and the ability to schedule playlists would make it very good for presentations or custom TV viewing.
Standard-issue should be a keyframe-cuts stream editor for basic trimming, excerpting, and joining of the native stream format. Even looking for a compatible editor online is a nightmare. Transcoding or re-muxing shouldn't be required. Perhaps the HDMI-out player could double as the editor with the addition of a few buttons and a save-as dialog. That would make edits a snap!
Capturing:
The ArcSoft capture module that is invoked manually or called by the scheduler appears to force the machine to decode preview video/audio, even when the preview is disabled during recording. There is no option to totally shut off preview at all times. It'll eat your netbook CPU alive.
There is a hardware acceleration toggle, but that doesn't support the Broadcom video decoder that some netbooks have or can be outfitted with, which has a high-priority h.264 decoder. I guess the hardware toggle is for GPU on high-end or newer machines.
On older Atom-based netbooks under XPsp3 or Win7sp1, a 720p or 1080i input results in nearly 100% cpu utilization at all times in CaptureModule. Even sitting there waiting to capture, the preview may lock up. Any recordings may truncate at less than a minute, even with preview supposedly off. 480i on the front input is more reliable, requiring less (but still significant) CPU.
There may be ways developers can provide preview video at lower overhead by sub-sampling keyframes or otherwise not completely decoding all frames, or even sub-streaming a tiny low framerate preview from the USB device. That's for the engineers to figure out.
So in the meantime, and counter-intuitively, we have to "back-burner" CaptureModule's access to the CPU for a netbook to get 720p captures to work (and only for manually initiated caps).
Copy below as 115 character single line to a text file, and rename it with a .cmd extension (cap-low.cmd)
start /low "" "C:\Program Files\ArcSoft\TotalMedia Extreme 2\TotalMedia Studio MV\CaptureModule.exe" /@RecordVideo@
Put the file somewhere out of the way and create a shortcut to it on the desktop. Then go into the shortcut's properties and set it to run minimized and change the icon to point at CaptureModule.exe at the path shown above. Rename the shortcut something simple like CapHD.
Now you've got a much better behaving CaptureModule that may actually record clean 720p if nothing else is running. The command script sets the cpu priority to LOW, so CaptureModule's preview decoding doesn't eat-up all your cpu cycles, and the stream can be recorded to disk with what's left.
That leaves open the possibility of dramatically lower CPU overhead during recording by omitting preview entirely. [see addendum below!]
Unfortunately, there's no way YET to make AVerMedia Scheduler call CaptureModule with the /low switch, so no unattended HD captures on low-end machines unless CaptureModule is fixed or replaced someday.
1080i is still too demanding even with that workaround. 720p is preferable for most things anyway no field order issues with different decoders, for one. 720p with 8000K video, 128K audio set to level 24 seems to be fine for most TV. Cable boxes can be set for fixed format 720p, although most default to 1080i, or a pass-through mode that can switch formats on you.
So, yes, you CAN do 720p HD recording on a low-end netbook! (to some extent)
The hardware in the C874 is good, but they won't let us use it efficiently.
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Addendum 11/25/12:
Sysinternals Process Explorer shows what's going on with CaptureModule.exe
Running CaptureModule with /low switch, minimized to taskbar, preview turned off during recording, CaptureModule still has _two_ HUGE threads of this running:
ASH264Vid.dll
-------------
H.264 video decoding core
ArcSoft Inc
Properties comment: "work with ASVID.ax to decode H264 bitstream"
ASVID.ax is ArcSoft Video Decoder.
So now that we know for sure what's happening, we can try stuff:
I started a capture with preview OFF, then manually suspended both threads of ASH264Vid.dll, and the capture CONTINUED right along, while CaptureModule's CPU use dropped to !!!!! 3% !!!!!! (have to resume both threads to stop capture)
Now we're getting somewhere!
Another less impressive result was simpler to try: Start a capture with preview ON, then toggle the preview checkbox OFF during the capture, and the CPU drops to around 25% and the decoder threads vanish. Not sure why the vastly different numbers vs the direct suspend method... ???
So if AverMedia and ArcSoft just release a CaptureModule that can turn off preview properly, during recording and full-time, the product would work with almost any PC. But really, they should support the Broadcom codec as well, to get full functionality.
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Amazing item, only difference between the hauppauge hd pvr and this that's the hauppauge has optical cable for audio, other than that the capture is exactly the same plus the avermedia has better look that fits any entertainment centreFind helpful customer reviews and review ratings for AVERMEDIA AVERTV HD USB DVR TV Tuners and Video Capture C874 Sleek
Although there are some issues with the guide and Dish Network, it's the best USB tuner I've used. The IR blaster is very handy for universal remote use, and it works well even on a weak system. The HTPC I have it connected to has an Intel D2500NH and 3GB of Ram, and it works flawlessly.
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