GH1 firmware research volunteers required

[sunboy]

-30 min removal
-Native 25p

-Video Buffer: 25.000.000
-Bitrate 1: 20000000
-Bitrate 2: 25000000
-GOP 1080P 25: 6

Recording works well, but for every GOP size lower than 13 video stops for a short moment every few frames.

http://www.materialordner.de/aDvRtQP...BqOeQz3kA.html



Hope it helps,
Björn

[Ben_B]

Sorry to be one of these people....

Is it theoretically possible to patch to allow for playback of Native 24p in-camera or is this something which would be difficult or impossible.

As great as no-pulldown is, I am of the belief that convenience on set (being able to check a take) outweighs convenience in post (especially when that means just dropping some footage into a droplet and letting it go.)

[JerryB]

As great as no-pulldown is, I am of the belief that convenience on set (being able to check a take) outweighs convenience in post (especially when that means just dropping some footage into a droplet and letting it go.)

I AGREE that being able to view what you have shot on set is more useful than having to simply remove pull-down in neoscene (this is still a waste of time). Although, I would gladly sacrifice being able to view in camera on set if native 720/24p were able to be accomplished, since having native 24p in camera would be far better than having to convert 60p to 24p. I have yet to figure out how to do this without some sort of issue with image.

[Tameside]

eye-fi!

On set you have laptop's, netbooks or something with wifi, with eye-fi you can monitor wirlessley all over the set what has just been taken, direct from the cam;-)

[Park Edwards]

if it's possible to playback in camera, awesome, but it's really not necessary. it was such a breeze to playback on my laptop onset than to have looked at each or every other clip after shooting. it aslo saved me time too. i think it's better to view something on a full 1080p screen for playback vs a little lcd screen.

[Ben_B]

I AGREE that being able to view what you have shot on set is more useful than having to simply remove pull-down in neoscene (this is still a waste of time). Although, I would gladly sacrifice being able to view in camera on set if native 720/24p were able to be accomplished, since having native 24p in camera would be far better than having to convert 60p to 24p. I have yet to figure out how to do this without some sort of issue with image.

There are methods that do it that seem pretty much perfect. Just dropping it into a 24p timeline looks fine for maybe 80% of footage and for the other 20% I use Compressor. Good sticky on this here: http://www.dvxuser.com/V6/showthread.php?t=175852

if it's possible to playback in camera, awesome, but it's really not necessary. it was such a breeze to playback on my laptop onset than to have looked at each or every other clip after shooting. it aslo saved me time too. i think it's better to view something on a full 1080p screen for playback vs a little lcd screen.

I use an HDMI monitor for playback on set. I usually just have my hackintosh netbook in my bag to dump cards on set, to save the space of a real laptop, so it doesn't play back too well. I also check the sound very often, my audio plug is a little messed up so before I shoot I always make sure the mic is coming in properly. Additionally, I like to be able to zoom in on the first frame (you can zoom before you hit play) and check for moiré...and being able to do that without toting a rig around is convenient...can you still do this with the patch?

[andyjar]

Hi tester. This is just to let you know the whole pulldown thing aint working out super well.
I shot something today with the settings I mentioned above, these are:
-30 min removal
-Native 24p
-Pal>NTSC

-Video Buffer: 25.000.000
-Bitrate 1: 20000000
-Bitrate 2: 21000000

And I'd like to show you what I'm seeing. My NLE (confirmed across Premiere AND After Effects) shows it as 23.976p, as it should. However it shows some subtle interlace lines in the areas with a lot of chroma...


http://imgur.com/mPRAS.jpg


These can be removed at the expense of ghosting by changing it to upper or lower field first...

http://imgur.com/zwE2L.jpg

[PappasArts]

What's more important; does the image improve since the codec only needs to handle 24 frames and not 60 fields for compression.

Has anyone confirmed this?

This alone would be worth using the patch, if so.


Pappas
http://www.pbase.com/Arrfilms

[sunsurfh2o]

Tester13: Transaction ID: 0J807190J9708683Y

Donated. Just the 24p without doing back flips is HUGE to me, anything else is icing. Thanks for your contribution!

I like to be able to zoom in on the first frame (you can zoom before you hit play) and check for moiré...and being able to do that without toting a rig around is convenient...can you still do this with the patch?

In short, Ben, no. Not only can you not zoom, but if you have ANY 1080p footage on your card when you cycle the camera on you will not be able to preview anything whatsoever--that includes pictures and 720p material. To do so you need to record a quick 720p clip or take a picture to make sure 1st item playing back is not the 1080p footage.

[Ben_B]

Hi tester. This is just to let you know the whole pulldown thing aint working out super well.
I shot something today with the settings I mentioned above, these are:
-30 min removal
-Native 24p
-Pal>NTSC

-Video Buffer: 25.000.000
-Bitrate 1: 20000000
-Bitrate 2: 21000000

And I'd like to show you what I'm seeing. My NLE (confirmed across Premiere AND After Effects) shows it as 23.976p, as it should. However it shows some subtle interlace lines in the areas with a lot of chroma...


http://imgur.com/mPRAS.jpg


These can be removed at the expense of ghosting by changing it to upper or lower field first...

http://imgur.com/zwE2L.jpg

I don't think that's interlacing, I think that's the 4:2:0 chroma subsampling...in fact...I bet this might be an issue!!!

According to wikipedia, this is what you get when you apply interlaced chroma subsampling to a progressive frame:


Looks pretty similar to your crop eh? I bet this is what's happening in camera. However, I have noticed this on footage with the pulldown removed as well...I think it's an artifact of the way the camera does 4:2:0 which then ends up on progressive footage.

[andyjar]

I don't think that's interlacing, I think that's the 4:2:0 chroma subsampling...in fact...I bet this might be an issue!!!

According to wikipedia, this is what you get when you apply interlaced chroma subsampling to a progressive frame:


Looks pretty similar to your crop eh? I bet this is what's happening in camera. However, I have noticed this on footage with the pulldown removed as well...I think it's an artifact of the way the camera does 4:2:0 which then ends up on progressive footage.

This may very well be it, however I never noticed it with the regular Panasonic firmware shooting 25p native.

[Ben_B]

I've actually only noticed it when color keying, I think I frakked things up converting to 422 10-bit. But yeah, it's definetly an issue with interlaced chroma subsampling and progressive frames.

[Barry_Green]

Also depends on your version of Premiere. CS4 bugs on AVCHD footage and progressive chroma. Try that footage in a different NLE, or upload the clip and let us try it, because I got burned on CS4's buggy AVCHD 4:2:0 "progressive" chroma.

[Park Edwards]

CS4 and CS5 will play AVCHD and you can edit it natively, but don't expect it to be without issues. Both NLE's are still ironing out kinks. The 24p stuff I've shot, to me, looks great and plays fine, but there are artifacts from preview that show up all the time, but aren't in the file. Same goes if I were to play it in VLC.

[Park Edwards]

There are methods that do it that seem pretty much perfect. Just dropping it into a 24p timeline looks fine for maybe 80% of footage and for the other 20% I use Compressor. Good sticky on this here: http://www.dvxuser.com/V6/showthread.php?t=175852



I use an HDMI monitor for playback on set. I usually just have my hackintosh netbook in my bag to dump cards on set, to save the space of a real laptop, so it doesn't play back too well. I also check the sound very often, my audio plug is a little messed up so before I shoot I always make sure the mic is coming in properly. Additionally, I like to be able to zoom in on the first frame (you can zoom before you hit play) and check for moiré...and being able to do that without toting a rig around is convenient...can you still do this with the patch?

Didn't you upload a pic once of 3 macbooks somewhere? A laptop is hardly considered a rig. But to each their own. Maybe tester will find a way to play back native files, but not having to remove pull down is pretty sweet.