GH1 720p30 mode at DVinfo.net

Steve Mullen · March 5th, 2009, 10:26 PM

Although the GH1 can record using AVCHD, it can also record to Photo-JPEG which is very EZ to edit. One potential issue -- recording is at the non-video rate of 30.00fps rather than 29.97fps.

I've got video samples, but no way to host.

Bill Koehler · March 5th, 2009, 10:35 PM

Steve,

If you would confirm for me, the video bitrate for the JPEG video is 30.8 Mbps?
I'm just not used to seeing numbers that high in a consumer product.

On the other hand, the audio numbers, especially the 16 KHz sampling rate, confirms that anyone half way serious about shooting with this will be recording double system audio.

16KHz might be OK for dialog, but not for any kind of musical performance.

Paulo Teixeira · March 5th, 2009, 10:38 PM

If it’s a bandwidth issue, you can either upload it to a file sharing site, Vimeo, or I’m sure Chris Hurd wouldn’t mind hosting them.

Liza Witz · March 5th, 2009, 11:04 PM

Can you upload them to Vimeo? IF you do so, you can set it so that others can download the original files (if they have a free Vimeo membership.)

I'm keen to see and play with any examples from the GH1.

Steve Mullen · March 5th, 2009, 11:16 PM

Quote:

Originally Posted by Bill Koehler

Steve,

If you would confirm for me, the video bitrate for the JPEG video is 30.8 Mbps?
I'm just not used to seeing numbers that high in a consumer product.

On the other hand, the audio numbers, especially the 16 KHz sampling rate, confirms that anyone half way serious about shooting with this will be recording double system audio.

16KHz might be OK for dialog, but not for any kind of musical performance.

Remember this is, contrary to what I thought I'd read, Photo-JPEG not Motion-JPEG. So the data rate seems right.

Bill Koehler · March 6th, 2009, 12:43 AM

Steve, Thanks. Just trying to make sure what little I know, I know.

Adrian Frearson · March 6th, 2009, 02:36 AM

Steve

Thanks for posting this info. I'm really look forward to seeing some clips from this camera, other than the tiny ones on the Panasonic website. There must be a few typos in the Panasonic specs for the camera DMC-GH1 | PRODUCTS | LUMIX | Digital Camera | Panasonic Global

It does say Motion Jpeg, Photo Jpeg is unusual I think as a camera codec, but I'd welcome it as it's great to work with even if it would fill up memory cards pretty quickly!

Adrian

Henry Olonga · March 6th, 2009, 04:29 AM

Hi Steve,I too look forward to some samples of the video.I second Vimeo.Easy sign up and we can download the original.Or Exposureroom as well.Take care
H

Steve Mullen · March 6th, 2009, 03:19 PM

Quote:

Originally Posted by Henry Olonga

Hi Steve,I too look forward to some samples of the video.I second Vimeo.Easy sign up and we can download the original.Or Exposureroom as well.Take care
H

Give me a few days I'll do ExposureRoom.

Jose A. Garcia · March 8th, 2009, 10:37 AM

Do you have 1080p24 samples too?

Steve Mullen · March 8th, 2009, 08:35 PM

Quote:

Originally Posted by Jose A. Garcia

Do you have 1080p24 samples too?

Yes. But AVCHD can't be uploaded.

Ivan Pin · March 9th, 2009, 09:47 PM

Steve, you can upload raw samples here: RapidShare: Easy Filehosting

It's free.

Steve Mullen · March 10th, 2009, 01:21 AM

OK -- here is the link to ExposureRoom:

Steve Mullen On ExposureRoom - Videos

Remember these are 3rd generation videos. Anyway, I was checking for motion judder because I could see noise in the prototype which meant it was not a unit I was going to use for pix quality checks. You can also see the AF and AE at work.

The zoom ring was so stiff there was no way I was going to try zooming while shooting. Big negative for run & gun.

The other negative -- I have small hands and the grip was WAY too tiny to feel good and to feel solid. Pana skimped it a crucial area.

The switches and manual controls were wonderful. The symbols made no sense to me or to the rep.

Enjoy!

Kevin Shaw · March 25th, 2009, 01:12 PM

Quote:

Originally Posted by Steve Mullen

One potential issue -- recording is at the non-video rate of 30.00fps rather than 29.97fps.

What would be the visual consequences of shooting and editing 30.0 fps and then rendering out to standard HD video at 29.97 fps?

Anna Uio · June 17th, 2009, 04:35 PM

Quote:

Originally Posted by Kevin Shaw

What would be the visual consequences of shooting and editing 30.0 fps and then rendering out to standard HD video at 29.97 fps?

I believe it is simply that every 1000th frame is dropped. Also audio will build up a lag with video by 1 frame, i.e. 1/30th of a second, over a period of 1000 frames (33.33 seconds), and then instantly catch up when the frame is dropped.

Some software will blend frames instead of just dropping, but that looks terrible, and causes a weird periodic blur that comes and goes every 33 seconds.

Cheers,
Anna

March 5th, 2009, 10:26 PM	#1
Steve Mullen HDV Cinema Join Date: Feb 2003 Location: Las Vegas Posts: 4,007	GH1 720p30 mode Although the GH1 can record using AVCHD, it can also record to Photo-JPEG which is very EZ to edit. One potential issue -- recording is at the non-video rate of 30.00fps rather than 29.97fps. I've got video samples, but no way to host. Attached Thumbnails __________________ Switcher's Quick Guide to the Avid Media Composer >>> http://home.mindspring.com/~d-v-c

March 5th, 2009, 10:38 PM	#3
Paulo Teixeira Trustee Join Date: Dec 2005 Location: Massachusetts Posts: 1,773	If it’s a bandwidth issue, you can either upload it to a file sharing site, Vimeo, or I’m sure Chris Hurd wouldn’t mind hosting them. __________________ https://www.youtube.com/user/PhotoVi...esEtc/featured https://www.pond5.com/artist/paulot

March 6th, 2009, 04:29 AM	#8
Henry Olonga Major Player Join Date: Oct 2007 Location: London Posts: 201	Host Hi Steve,I too look forward to some samples of the video.I second Vimeo.Easy sign up and we can download the original.Or Exposureroom as well.Take care H

March 8th, 2009, 10:37 AM	#10
Jose A. Garcia Major Player Join Date: May 2007 Location: Sevilla (Spain) Posts: 439	Do you have 1080p24 samples too? __________________ Jose A. Garcia - Freelance camera operator, web designer and VFX artist - http://www.sinproblema.net/

March 10th, 2009, 01:21 AM	#13
Steve Mullen HDV Cinema Join Date: Feb 2003 Location: Las Vegas Posts: 4,007	OK -- here is the link to ExposureRoom: Steve Mullen On ExposureRoom - Videos Remember these are 3rd generation videos. Anyway, I was checking for motion judder because I could see noise in the prototype which meant it was not a unit I was going to use for pix quality checks. You can also see the AF and AE at work. The zoom ring was so stiff there was no way I was going to try zooming while shooting. Big negative for run & gun. The other negative -- I have small hands and the grip was WAY too tiny to feel good and to feel solid. Pana skimped it a crucial area. The switches and manual controls were wonderful. The symbols made no sense to me or to the rep. Enjoy! __________________ Switcher's Quick Guide to the Avid Media Composer >>> http://home.mindspring.com/~d-v-c

March 5th, 2009, 10:35 PM	#2
Bill Koehler Major Player Join Date: May 2007 Location: Alpharetta, Georgia, USA Posts: 760	Steve, If you would confirm for me, the video bitrate for the JPEG video is 30.8 Mbps? I'm just not used to seeing numbers that high in a consumer product. On the other hand, the audio numbers, especially the 16 KHz sampling rate, confirms that anyone half way serious about shooting with this will be recording double system audio. 16KHz might be OK for dialog, but not for any kind of musical performance.

March 5th, 2009, 11:04 PM	#4
Liza Witz Regular Crew Join Date: Feb 2009 Location: Denver, CO Posts: 46	Can you upload them to Vimeo? IF you do so, you can set it so that others can download the original files (if they have a free Vimeo membership.) I'm keen to see and play with any examples from the GH1.

March 6th, 2009, 12:43 AM	#6
Bill Koehler Major Player Join Date: May 2007 Location: Alpharetta, Georgia, USA Posts: 760	Steve, Thanks. Just trying to make sure what little I know, I know.

March 6th, 2009, 02:36 AM	#7
Adrian Frearson Regular Crew Join Date: May 2008 Location: U.K Posts: 154	Steve Thanks for posting this info. I'm really look forward to seeing some clips from this camera, other than the tiny ones on the Panasonic website. There must be a few typos in the Panasonic specs for the camera DMC-GH1 \| PRODUCTS \| LUMIX \| Digital Camera \| Panasonic Global It does say Motion Jpeg, Photo Jpeg is unusual I think as a camera codec, but I'd welcome it as it's great to work with even if it would fill up memory cards pretty quickly! Adrian

March 9th, 2009, 09:47 PM	#12
Ivan Pin Regular Crew Join Date: Jan 2007 Location: Novosibirsk, Russia Posts: 46	Steve, you can upload raw samples here: RapidShare: Easy Filehosting It's free.

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