Temp FAQ

Jack Daniel Stanley

Moderator
Staff member
This is quick and dirty, temporary, and by no means definitive. This is just a stop gap until we can put together something more official.

NOTE: THE FOLLOWING IS BASED LARGELY ON SECOND HAND EXPERIENCE, CONJECTURE, AND WILDY HELD OPINION. IT CAN ALL CHANGE TOMORROW AND MAY BE INACCURATE. NO ONE HAS CONDUCTED CONTROLLED TESTS WITH THIS BRAND SPANKIN' NEW CAMERA - YET.

  1. Can you buypass the AVCHD codec by recording out HDMI?
    No.
  2. Can you live monitor out via HDMI or any Composite Output?
    No.
  3. Can you playback via HDMI or Composite?
    Yes.
  4. What are the frame rates / modes the camera shoots in?
    1080 24p AVCHD
    720 60p AVCHD
    720 30p MJPEG
  5. Can I put my old manual lenses on it?
    Yes with adapters. See this DVXuser thread:
    http://www.dvxuser.com/V6/showthread.php?p=1638227#post1638227
    The GH1 is micro 4/3rds camera. Panasonic sells a 4/3rds to micro 4/3rds adapter. Then you have to get another adapter to connect your lens to the 4/3rds adapter. You can get these type of adapters on the panny website or here:
    http://cameraquest.com/adp_micro_43.htm
    ALTERNATELY you can get adapters that go straight from your old lens to Micro 4/3rds on EBAY. Nikon direct to micro 4/3 (and maybe Canons?) seem to only be available outside the USA right now so expect a bit longer shipping.
  6. What kind of Media / Cards do I need? SDHC Class 4 or 6. Don't buy into the hype and spend twice the money on something you don't need. If you format the card properly / don't have footage from different cameras on it already, it will be plenty fast. If you want faster download times when dumping to your computer then you can spring for the more expensive cards. But you don't need them to record to.
    We have reports of working with Class IV no problem. I picked the middle ground and use Class VI though it appears this may not be necessary. You def. don't nee the super expensive extreme cards regardless of what the salesperson says, unless, again, you want lighting fast download times.
  7. Can I record Audio to the Camera?
    Yes and no. Yes you can. No you shouldn't. Right now there's no way to disable the audio gain, so when things get quiet the sound will ramp up with a hiss. Most folks are looking at the Zoom H4N ($300 - $350) a small portable recorder whose capabilities blow away any in camera audio recording, DVX to Red. You can get the Zoom H4 for about $100 cheaper it also has phantom power, and may be easier to camera mount with less handling noise (link) and still has better audio than any video camera - Mino Flip up to the Red. Preamps and other features are better and more numerous with teh H4N

    Also there's the Beachtek DXA 5D. It's designed for the Canon 5D MARK II which has the same audio problem, comes with nice XLR inputs and VU meters and solves the problem by emitting an inaudible high pitch toned that tricks the auto gain of the camera into a constant level.
    UPDATE:

    To connect a BeachTek DXA-5D external audio mixer to the GH1's mic input, a specific plug adapter is required. There's one from Radio Shack which works:
    http://www.dvxuser.com/V6/showpost.php?p=1660860&postcount=12

    The BeachTek DXA-5D essentially "disables" the GH1's audio auto-gain (AGC):
    http://www.beachtek.com/dxa5d.html
  8. What does this camera do that other DSLR's don't?
    Cost half as much.
    1080 24p
    Auto focus in video mode.
    It has a quite lens so it won't mess up your audio as it adjusts.
    Virtually no jello or skew in 1080 24p less in 720 60p and less in 720 30p.
  9. What's the downside of this camera?
    While it's too early to make any definitive conclusions there appears to be a problem of "Mud", macro blocking, during medium speed pans with high detail in the 1080 24p AVCHD mode. The issue seems to be apparant as well in the 720 60p AVCHD mode, though to a lesser degree. In 720 30p MJPEG however, it's non existent One workflow to consider would be as follows:
    Shoot 1080 24p for your wow resolution moments
    Shoot 720 60p for sequences with more movement
    Shoot 720 30p if you're having a problem with mud or macro blocking.
    Conform the non 24p stuff to 24p in post, throw on a 24p timeline of either 720 or 1080, mix well, enjoy.*
    *Some have suggeste that conforming frame rates in post is not so simple and can be in inconsisent science, especially going from 30p to 24p. 60p to 24p may be more consistent. But Mark II people have been shooting and conforming 30p to 24 for a while.
    **UPDATE:60p can be conformed to 24p near perfectly, though painstakingly via compressor. 30p to 24 is another story. Some stutter will likely be visible with 30-24. This will be more noticeable when filmming a smooth moving subject like a car or a hockey puck and varying degrees of less noticeable when filmming a more erratic subject.
  10. How do I remove pulldown in post?
    Look for Isaac Brody's stickies in the workflow section.
  11. Where can I download a PDF copy of the User Manual for the GH1?
    Enter "DMCGH1K" for the model number:
    http://dlc.panasonic-europe-service.com/EUDocs/

  12. Does the GH1 have a maximum AVCHD video clip length?
    Yes and no. GH1 cameras sold in EU countries are limited to a maximum AVCHD video clip recording length of 30 minutes. GH1 cameras sold everywhere else are limited only by the SDHC memory card capacity; e.g.: can record for hours at a time on AC power or until the battery goes dead.

    The Gh1's MJPEG recordings are limited to 2GB (see p.107 in the GH1 user manual).

    Caution: According to the GH1 user manual (p.25), a power failure during recording will prevent the current clip from being saved.
  13. Where does Panasonic post firmware, software, & documentation updates and tips & tricks for the GH1?
    http://panasonic.jp/support/global/cs/dsc/index.html

AS YOU HAVE MORE POST THEM HERE. I'LL ADD YOUR QUESTIONS HERE TO THE ABOVE LIST.
 
The GH1 can output composite video during preview & playback, but not when the cam is in record mode:
http://www.dvxuser.com/V6/showpost.php?p=1621831&postcount=253

EDIT: A SD or SDHC card must be in the GH1 for the above technique to work.

To connect a BeachTek DXA-5D external audio mixer to the GH1's mic input, a specific plug adapter is required. There's one from Radio Shack which works:
http://www.dvxuser.com/V6/showpost.php?p=1660860&postcount=12

The BeachTek DXA-5D essentially "disables" the GH1's audio auto-gain (AGC):
http://www.beachtek.com/dxa5d.html

....

Lens adapters for GH1 from a reliable US-based dealer:
http://cameraquest.com/adp_micro_43.htm
 
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Can you live monitor out via HDMI or any other output?
No.

^-- Didn't somebody mentioned you can monitor over composite low res but not during recording


What are the frame rates / modes the camera shoots in?
1080 24p AVCHD / 720 60p AVCHD - NTSC model
1080 25p AVCHD / 720 50p AVCHD - PAL model
720 30p MJPEG - NTSC & PAL model


Can I record Audio to the Camera?
it was designed for the MII and it remains to be seen as to whether or not this thing will work with the three ringed audio input of the GH1, could be another good alternative though.

^--- I think Super8 has gotten this to work with the Beachtek DXA 5D




​

​
 
Lens adapters for GH1 from a reliable US-based dealer:
http://cameraquest.com/adp_micro_43.htm
they don't have nikon DIRECT to mircro 4/3 though.
looked there. udapted though.

The GH1 can output composite video during preview & playback, but not when the cam is in record mode:
http://www.dvxuser.com/V6/showpost.php?p=1621831&postcount=253
Right. Said it could not do LIVE monitoring via HDMI or ANY other output. Will specifically add composite though.

To connect a BeachTek DXA-5D external audio mixer to the GH1's mic input, a specific plug adapter is required. There's one from Radio Shack which works:
http://www.dvxuser.com/V6/showpost.php?p=1660860&postcount=12

The BeachTek DXA-5D essentially "disables" the GH1's audio auto-gain (AGC):
http://www.beachtek.com/dxa5d.html
cool, when I talked to Beachtek last week they were unware of this.
 
10. Where can I download a PDF copy of the User Manual for the GH1?
Enter "DMCGH1K" for the model number:
http://dlc.panasonic-europe-service.com/EUDocs/

11. Does the GH1 have a maximum AVCHD video clip length?
Yes and no. GH1 cameras sold in EU countries are limited to a maximum AVCHD video clip recording length of 30 minutes. GH1 cameras sold everywhere else are limited only by the SDHC memory card capacity; e.g.: can record for hours at a time on AC power or until the battery goes dead.

The Gh1's MJPEG recordings are limited to 2GB (see p.107 in the GH1 user manual).

Caution: According to the GH1 user manual (p.25), a power failure during recording will prevent the current clip from being saved.

12. Where does Panasonic post firmware, software, & documentation updates and tips & tricks for the GH1?
http://panasonic.jp/support/global/cs/dsc/index.html
 
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[Not specific to the GH1, but relevant.]:

Q: How can I reduce motion-induced compression artifacts in the video I shoot?

A: Stabilize the camera! If hand-holding the camera, when possible use the viewfinder instead of the LCD: press the cam against your head, press your elbows onto your chest, and breath slowly (or hold your breath). Or: Lean against something inert such as a wall, door frame, lamp post, parked car, etc. Or: Set the camera on a sturdy table or similar surface. Or: Use a tripod, monopod, "steadicam", jib, etc. In general, to reduce motion-induced compression artifacts, keep the camera stationary, or either move the cam very slowly or very fast. Pan less! Tilt less! Zoom less! Sometimes, less is more.

Also: Use a "180 degree" shutter speed: For example, if recording at 24fps, set the shutter to approx. 1/48th-sec. to slightly blur moving details in the scene. Use depth of field control techniques to create a scene with shallow DOF so foreground/background details are out of focus & thus easier to compress. Use lighting & exposure control to force unimportant areas of the frame to easier-to-compress large areas of dark/bright. Motivate camera moves by giving the audience something to "follow" -- such as an actor walking -- so they don't notice compression artifacts elsewhere in the frame. Use diffusion filters, smoke, fog to soften detail and make it easier to compress. Use composition & framing to make the audience look at something in the frame which is relevant to your story instead of a weakness in the medium. Avoid high-detail scenes in which "everything" in the frame moves, such as wind-blown trees & grass, water, and so forth, or use the techniques mentioned here to minimize the fine detail or distract viewers' attention from it.

Efforts to reduce motion-induced compression artifacts recorded in-camera will also reduce compression artifacts introduced further down the production chain. After being compressed in-camera, the video you shoot may be compressed again when captured into a computer editing application or when transcoded to an editing codec. If not edited in an uncompressed editing environment, the video is compressed again when effects, transitions, fades, and color correction are applied. It will be compressed again for DVD, BluRay, web, iPod, and TV broadcast/cable/satellite distribution. Every time your video is re-compressed, your efforts to reduce motion-induced compression artifacts in-camera will noticeably improve the resulting video quality.

Q: Are there recommended camera pan/tilt speeds to reduce motion judder when shooting at 24 fps and other relatively slow frame rates?

Yes, the American Cinematographer Manual covers this in detail.

Refer also to:
http://www.gecko-cam.com/HTML/KNOW-HOW/panning-speed.htm
 
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Ah, the mud has been mentioned in the FAQ despite no actual controlled test of this actually being posted. Let the pointless posting begin
 
Ah, the mud has been mentioned in the FAQ despite no actual controlled test of this actually being posted. Let the pointless posting begin
READ
the first sentence of the FAQ regarding mud.
PLEASE.
Jack Daniel Stanley said:
8. What's the downside of this camera?
While it's too early to make any definitive conclusions ...
I'm perhaps the BIGGEST advocate of NOT declaring the sky falling until real controlled tests by professionals that are maintaining consistency in testing, changing one variable at a time, have been conducted and conclusions drawn there upon.

There does however appear to be SOME kind of issue. How severe, whether it's user caused, defective camera caused, typical of cmos in general, controllable, avoidable, work aroundable, etc, is all up in the air.

Also it DOES say HOWEVER in the MANUAL that if you pan to quickly the image will break up. It also DOES say that AVCHD modes are for HDTV's and MJPEG is for the internet.

In case that sentence is lost, I added an all caps disclaimer at the top of the first post.

I also stated that this was a
TEMP
FAQ
hastily hobbled together at the request of the members because so much information is coming in and getting buried in long off topic threads.

First Sentence as it appeared when you read the post:
Jack Daniel Stanley said:
This is quick and dirty, temporary, and by no means definitive. This is just a stop gap until we can put together something more official.
Based on your post, I've since added an ALL CAPS disclaimer below the previous sentence about the protean nature of the information in the FAQ.
 
Hi Jack, thanks for taking the time to put the TEMP FAQ together, very noble.

Also there's the Beachtek DXA 5D. It's designed for the Canon 5D MARK II which has the same audio problem, comes with nice XLR inputs and VU meters and solves the problem by emitting an inaudible high pitch toned that tricks the auto gain of the camera into a constant level.

Do you know if anyone has posted samples of dialog recorded this way?
And since there is no limiter in the DXA-5D, are there recommended settings so clipping is less likely?

AC-3 is the technical denomination for the Dolby Digital format.
In Kholi's Mjpeg samples the sound is uncompressed 16KHz.

Hi Martti, Have you got a link for Kholi's samples?
Also, do you know if Kholi used the beachtek 5D?
 
The only one so far I've seen mentioning actually using the Beachtek is Super8 and I haven't seen any samples from him.

If Kholi's samples are still up the link is buried somewhere in his huge thread, doubt he used a Beachtek, sounds like the built-in mic and it was only a quick test to show the image look of the mjpeg (or rather PhotoJPEG) mode. Only some outdoor ambience sounds in them.
 
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