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Looking for H.264 DVR, any suggestion
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| cctvsentry |
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Posts: 4
Joined: 11 Jun 2008
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Posted: Thu Jun 12, 2008 8:49 am
Post subject: Looking for H.264 DVR, any suggestion
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I need 240 fps CIF recording at least for 4, 8 and 16 channel. SATA is necessary. Somebody said YOKO has new H.264 DVR and it is in mass production. Where is this company? is it a good unit? if you have nice piece, let me know.
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| todd2 |
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Posts: 25
Joined: 05 Jun 2008
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Posted: Thu Jun 12, 2008 11:45 am
Post subject:
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Are you sure you only need CIF? I tried CIF on my avtech and it was
really crappy quality. Even frame at best resolution is disappointing.
Make sure you actually see the CIF format in person if you're going to
drop a lot of coin.
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| cctvsentry |
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Posts: 4
Joined: 11 Jun 2008
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Posted: Thu Jun 12, 2008 1:15 pm
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| todd2 wrote: |
Are you sure you only need CIF? I tried CIF on my avtech and it was
really crappy quality. Even frame at best resolution is disappointing.
Make sure you actually see the CIF format in person if you're going to
drop a lot of coin. |
I said at least CIF 240 fps, becuase i thought they may give me 120fps as HD1 for 4 channel and 30 fps at D1 for 8 and 16 channel.
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| todd2 |
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Posts: 25
Joined: 05 Jun 2008
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Posted: Thu Jun 12, 2008 3:43 pm
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I wasn't talking about the fps, I meant the quality of CIF independent of
the fps--the fidelity of the pixel capture. On the AVC761, even frame best
is not very good. I can accept the 7.5 fps per channel, but don't like the
fact that I'm not getting DVD resolution capture.
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| BennyBoy |
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Posts: 30
Joined: 04 Jun 2008
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Posted: Mon Jun 16, 2008 10:09 pm
Post subject: Re: Looking for H.264 DVR, any suggestion
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| cctvsentry wrote: |
| I need 240 fps CIF recording at least for 4, 8 and 16 channel. SATA is necessary. Somebody said YOKO has new H.264 DVR and it is in mass production. Where is this company? is it a good unit? if you have nice piece, let me know. |
Are you sure you need h.264? I ask because I've been looking for a good 264 DVR myself and I'm finding the Mpeg4 units seem to have much better image quality. Dont get me wrong, I know H.264 is far better than the standard mpeg4 if implemented correctly. I'm finding the current DVR's under a $1000. do not have the processing power to give a high quality image.
I use a Mac PC, its a two cpu G5 @ 2 ghz and for me to compress a 90 min DVD movie in the highest quality H.264 takes about 6 hours. The same movie in the same quality with Mpeg4 takes about 30 mins. both files look as good as the DVD but the 264 file is about 1/4 the size of the Mpeg4.
My point is this, wait a couple of years for a H.264 dvr and settle for a good Mpeg4 dvr.
If you must have one now, I feel the G4-RTA D1 is the best for the money.
Last edited by BennyBoy on Tue Jun 17, 2008 12:35 am; edited 1 time in total
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| jasmilelv |
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Posts: 61
Joined: 23 Jan 2008
Location: Shenzhen, China
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Posted: Mon Jun 16, 2008 11:21 pm
Post subject: Re: Looking for H.264 DVR, any suggestion
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| cctvsentry wrote: |
| I need 240 fps CIF recording at least for 4, 8 and 16 channel. SATA is necessary. Somebody said YOKO has new H.264 DVR and it is in mass production. Where is this company? is it a good unit? if you have nice piece, let me know. |
Leave me your contact information.
I will send you our new DVR items for your reference.
_________________
Sell to USA
www.tmvideo.cn
We are a manufacturer of Standalone DVR.
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| scorpion |
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Posts: 2704
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Tue Jun 17, 2008 3:58 am
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| cctvintegration |
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Posts: 6
Joined: 27 Aug 2008
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Posted: Thu Aug 28, 2008 12:41 am
Post subject: 1cif quality
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| todd2 wrote: |
Are you sure you only need CIF? I tried CIF on my avtech and it was
really crappy quality. Even frame at best resolution is disappointing.
Make sure you actually see the CIF format in person if you're going to
drop a lot of coin. |
AVTech uses their own DISASTROUS MPEG4 algorithm. My guess is a T.I or ADI (BLackfin) dsp h.264 at 1CIF looks better than most 2CIF or even a few D1 standard MPEG4 units. I've seen the Texas Instruments Davinci DSP recording at 1CIF and it was near DVD quality. Not D1 of course, but I was blown away. And, there are now a ton of Davinci installed DVR units to choose from. H.264 is the standard now. Even Apple uses H.264, I think that says it all.
Not to be too hard on AVTech, for 99.00 FOB Taiwan, the 760 is a decent disposable 4ch DVR.
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| Jovacom |
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Posts: 1
Joined: 28 Aug 2008
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Posted: Thu Aug 28, 2008 4:01 am
Post subject: H.264, Best? solution for DVR
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| cctvsentry wrote: |
| I need 240 fps CIF recording at least for 4, 8 and 16 channel. SATA is necessary. Somebody said YOKO has new H.264 DVR and it is in mass production. Where is this company? is it a good unit? if you have nice piece, let me know. |
Hi,
We have used from factory direct models from Dahua technolgy in China. i can say, never seen better. you can forget the old things about china manufacturer, this company make totally new way to use DVR.
look from dahuasecurity dot com
i can give you login to our DVR if you like to test online features.
Chris
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| cctvintegration |
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Posts: 6
Joined: 27 Aug 2008
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Posted: Thu Aug 28, 2008 1:57 pm
Post subject: re: Dahua
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yes, certainly a step up from the old China stuff. I give kudo's to Dahua, Dali, and the bigggest of them all, Hikvision.
So my question is:
Why do so many distributors stick a 2 dollar name plate on these DVR and pretend they are the manufacturers of something so incredibly special, that a 16CH D1 DVR should cost 4k?
I understand oem branding, but be real, charge a reasonable price.
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| ClosedCircuitCom |
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Posts: 149
Joined: 26 Mar 2005
Location: Michigan
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Posted: Sat Aug 30, 2008 12:37 pm
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aventura has unparalleled picture quality compared to all other h.264 dvr's i have seen even at cif.
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| cctvintegration |
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Posts: 6
Joined: 27 Aug 2008
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Posted: Thu Sep 04, 2008 6:22 pm
Post subject: h.264
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| ClosedCircuitCom wrote: |
| aventura has unparalleled picture quality compared to all other h.264 dvr's i have seen even at cif. |
Again, please tell me why Aventuras Hikvison DVR is better than all the other OEM suppliers. If I buy a Hikvision from China and stick my name on it, will mine be better?
If I buy the spot on exact DVR on Ebay as opposed to ADI, and I save 2000.00 dollars, is my DVR of lesser quality?
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| oldtimer |
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Posts: 40
Joined: 05 Jul 2006
Location: Indiana (near Chicago)
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Posted: Sat Sep 06, 2008 12:01 am
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We have been using some low priced H264 recorders for some time now.
We install them on cheapy installations but we want a fairly decent recording. The fast food people wont pay big money for installations of
CCTV. A good supplier is in Florida. 888 233 3478. Ask for Henry.
Tell them John from Indiana referred you. Not looking for a comission,
I send him a lot of dealers because he has good service and prices are right.
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| dudu_georgescu |
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Posts: 5
Joined: 13 Nov 2008
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Posted: Fri Nov 14, 2008 1:42 pm
Post subject: Re: 1cif quality
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| cctvintegration wrote: |
| todd2 wrote: |
Are you sure you only need CIF? I tried CIF on my avtech and it was
really crappy quality. Even frame at best resolution is disappointing.
Make sure you actually see the CIF format in person if you're going to
drop a lot of coin. |
AVTech uses their own DISASTROUS MPEG4 algorithm. My guess is a T.I or ADI (BLackfin) dsp h.264 at 1CIF looks better than most 2CIF or even a few D1 standard MPEG4 units. I've seen the Texas Instruments Davinci DSP recording at 1CIF and it was near DVD quality. Not D1 of course, but I was blown away. And, there are now a ton of Davinci installed DVR units to choose from. H.264 is the standard now. Even Apple uses H.264, I think that says it all.
Not to be too hard on AVTech, for 99.00 FOB Taiwan, the 760 is a decent disposable 4ch DVR. |
Can you pls give some examples of DVRs that come with Davinci DSPs?
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| amirm |
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Posts: 6
Joined: 28 Oct 2008
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Posted: Sun Nov 16, 2008 2:16 am
Post subject: Re: 1cif quality
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[quote="cctvintegration"]
| todd2 wrote: |
| My guess is a T.I or ADI (BLackfin) dsp h.264 at 1CIF looks better than most 2CIF or even a few D1 standard MPEG4 units. |
CIF images are going to be soft no matter how little compression artifacts there are. Sure, if you are bandwidth starved, then an H.264 at lower resolution may be superior but if motion is small, even that won't be the case.
| Quote: |
| I've seen the Texas Instruments Davinci DSP recording at 1CIF and it was near DVD quality. |
 How do you get near DVD when you have one quarter the resolution?
| Quote: |
| Even Apple uses H.264, I think that says it all. |
I am not sure that says anything  . Apple's profile of H.264 is the lower complexity one anyway. The highest fidelity is HP which is used in production of Blu-ray.
The issue here is that standards do not specify encoder performance. Two H.264 could be wildly different from each other. With H.264 specially, there are a ton of shortcuts that can be made to achieve high frame rate. Software solutions running in DSP/PCs are liable to take the most shortcuts. Best solutions are used in broadcast products and even there, they take shortcuts relative to PC software professional encoders.
Broadcom has nice H.264 encoder silicon but I am not sure any DVR vendor uses it yet.
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