Crash cam video (not planned)

Kaku Ito · May 28th, 2006, 06:45 PM

I was surprised, too. I can probably do a lot better with more preparation.

And I have a Glidecam V8 and also formally owned FX1 and HC1, currently own HVX200 and A1.

Steven Mingam · May 30th, 2006, 04:26 PM

Hello, your sample is very interesting but it looks like the recompression quite blurred the image... Could you post a short extract (like 10 sec) from this video, straight from the cam ? I'm really interested by the mpeg4 encoder performance in those shaky conditions... Thanks !

Wayne Morellini · May 30th, 2006, 08:51 PM

Quite good? Time to compare serial numbers of the cameras, to see if they have improved the latest batch. How is the split screen low light problem, actually all the problems we have seen in the past with your camera?

Kaku Ito · May 31st, 2006, 04:09 AM

I will work on the short raw file and the version numbers as soon as I can spare my time.

Kaku Ito · June 2nd, 2006, 09:53 AM

couldn't think of how I could extracting a part from the original clip (QT pro wasn't installed in this machine at the moment), so I posted a similar clip with 30 seconds length. It is about 35MB and it is at the same post in my blog.

Wayne Morellini · June 10th, 2006, 11:30 AM

Finally managed to get that video downloaded (well 70MB over a dial up). Will have to reboot to play smoothly.

Wayne Morellini · June 12th, 2006, 03:06 AM

OK, I checked it out. I must say, I love the color, looks good. I went through it at 13% speed, and I must say, at slow speed that spinning picture is one of the coolest things I have seen.

There was a large amount of macro blocking and bland detailess surfaces (so 19mb/s H264 is definitely needed). The h264 codec tries to cover this up by blurring the block borders, but this leaves blurry smudgy crawling blobs in many places and missed some blocks. The footage quality keeps stuttering, I didn't note if it was related to image gop or not.

When the camera fell on the ground there was a lot of crawling detail as the exposure changed to compensate. I did notice some pixel crawl in the beginning bend.

This is ideal footage to tell what the limits of the camera are, but so much of this could be from, or made worse, by the SD h264 transcoding. Is it possible to get a 20 second native Mpeg4 extraction from the beginning, and maybe 15 second that shot from the ground. That should show what is doing what.

Thanks for the help Kaku.

Kaku Ito · June 12th, 2006, 05:10 AM

Wayne, thanks for your detailed observation.
I guess I should be able to extract using QuickTime Pro....oh, I just remember that I can probably put the clip back to the camera and use its edit capability to extract. I will do that.

Wayne Morellini · July 3rd, 2006, 12:02 AM

Kaku

How are you doing with extracting the footage, and do you have a Samsung yet?

Kaku Ito · July 3rd, 2006, 12:44 AM

Quote:

Originally Posted by Wayne Morellini

Kaku

How are you doing with extracting the footage, and do you have a Samsung yet?

My employee took the camera to Canada for awhile so I could not work on it, but now he came back so I will extract and post it.

Kaku Ito · July 9th, 2006, 05:54 AM

Quote:

Originally Posted by Wayne Morellini

Kaku

How are you doing with extracting the footage, and do you have a Samsung yet?

The files are ready here.

Wayne Morellini · July 9th, 2006, 10:04 PM

Thanks Kaku. Still no sign of next months Samsung camera?

Kaku Ito · July 9th, 2006, 10:08 PM

Quote:

Originally Posted by Wayne Morellini

Thanks Kaku. Still no sign of next months Samsung camera?

No, as matter of fact, Samsung does not sell video cameras in Japan.

Wayne Morellini · July 9th, 2006, 11:21 PM

Why isn't Samsung selling in Japan?

I am downloading those videos in those little plug-in web windows at the moment. I will try to look for them in my web cache and use Vlan on them, so I can view full screen and snap shoot true 720p frames for comparison.

Thanks again Kaku.

Douglas R. Bruce · July 10th, 2006, 12:48 AM

Quote:

Originally Posted by Wayne Morellini

Why isn't Samsung selling in Japan?

FACT.
Sony, Japan and Samsung, Korea have a lot of technological co-operation. e.g. there is a lot of Samsung technology in the Bravia HDTVs made here in Kumamoto, Japan.

WILD GUESS.
Maybe part of the co-operation deal is that Samsung does not sell cameras here.

June 2nd, 2006, 09:53 AM	#20
Kaku Ito Trustee Join Date: Jun 2004 Location: Chiyoda-ku, Tokyo Posts: 1,382	couldn't think of how I could extracting a part from the original clip (QT pro wasn't installed in this machine at the moment), so I posted a similar clip with 30 seconds length. It is about 35MB and it is at the same post in my blog. Last edited by Kaku Ito; June 3rd, 2006 at 06:13 AM.

May 28th, 2006, 06:45 PM	#16
Kaku Ito Trustee Join Date: Jun 2004 Location: Chiyoda-ku, Tokyo Posts: 1,382	I was surprised, too. I can probably do a lot better with more preparation. And I have a Glidecam V8 and also formally owned FX1 and HC1, currently own HVX200 and A1.

May 30th, 2006, 04:26 PM	#17
Steven Mingam Regular Crew Join Date: Aug 2004 Posts: 91	Hello, your sample is very interesting but it looks like the recompression quite blurred the image... Could you post a short extract (like 10 sec) from this video, straight from the cam ? I'm really interested by the mpeg4 encoder performance in those shaky conditions... Thanks !

May 30th, 2006, 08:51 PM	#18
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	Quite good? Time to compare serial numbers of the cameras, to see if they have improved the latest batch. How is the split screen low light problem, actually all the problems we have seen in the past with your camera?

May 31st, 2006, 04:09 AM	#19
Kaku Ito Trustee Join Date: Jun 2004 Location: Chiyoda-ku, Tokyo Posts: 1,382	I will work on the short raw file and the version numbers as soon as I can spare my time.

June 10th, 2006, 11:30 AM	#21
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	Finally managed to get that video downloaded (well 70MB over a dial up). Will have to reboot to play smoothly.

June 12th, 2006, 03:06 AM	#22
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	OK, I checked it out. I must say, I love the color, looks good. I went through it at 13% speed, and I must say, at slow speed that spinning picture is one of the coolest things I have seen. There was a large amount of macro blocking and bland detailess surfaces (so 19mb/s H264 is definitely needed). The h264 codec tries to cover this up by blurring the block borders, but this leaves blurry smudgy crawling blobs in many places and missed some blocks. The footage quality keeps stuttering, I didn't note if it was related to image gop or not. When the camera fell on the ground there was a lot of crawling detail as the exposure changed to compensate. I did notice some pixel crawl in the beginning bend. This is ideal footage to tell what the limits of the camera are, but so much of this could be from, or made worse, by the SD h264 transcoding. Is it possible to get a 20 second native Mpeg4 extraction from the beginning, and maybe 15 second that shot from the ground. That should show what is doing what. Thanks for the help Kaku.

June 12th, 2006, 05:10 AM	#23
Kaku Ito Trustee Join Date: Jun 2004 Location: Chiyoda-ku, Tokyo Posts: 1,382	Wayne, thanks for your detailed observation. I guess I should be able to extract using QuickTime Pro....oh, I just remember that I can probably put the clip back to the camera and use its edit capability to extract. I will do that.

July 3rd, 2006, 12:02 AM	#24
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	Kaku How are you doing with extracting the footage, and do you have a Samsung yet?

July 9th, 2006, 10:04 PM	#27
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	Thanks Kaku. Still no sign of next months Samsung camera?

July 9th, 2006, 11:21 PM	#29
Wayne Morellini Inner Circle Join Date: May 2003 Location: Australia Posts: 2,762	Why isn't Samsung selling in Japan? I am downloading those videos in those little plug-in web windows at the moment. I will try to look for them in my web cache and use Vlan on them, so I can view full screen and snap shoot true 720p frames for comparison. Thanks again Kaku.