GH2 user for Video? Shadow Layer issue...

[mactreouser]

Hi,

Any GH2 users for video? Something I might not understand and hope to grab some idea from you!
I realised that the video I've taken from GH2 (no matter what format 1080i or 24p... with 160 shutter speed and above) will produced a delay shadow layer after every movement from the talent/people (I hope you understand the description). It just like Motion blur result? I don't know what it calls?! And not really easy to focus continuos though i've set it to Continuos focus all the time!

May I know what i've missed? You help are most appreciate!
Thanks.

 

[mactreouser]

I'm trying to search around but can't get any answer for do not know what's the term of the issue!

C'ld anybody trying to understand it? Haaa.. Appreciate!

 

[DXNMedia]

that is motion compression. happens to predictive long GOP inter-frame based video compression formats like MPEG2 & especially H264. No matter the bit rate that recording was set in, the heavily compressed Long GOP format will have this inherent problem due to it's encoding algorithm.

Quite interesting that you do notice that...May I know if you're shooting fast motion objects?

 

[Bamboopictures]

Never had that problem with my GH2. Should get your camera to Panasonic for a check.

 

[mactreouser]

that is motion compression. happens to predictive long GOP inter-frame based video compression formats like MPEG2 & especially H264. No matter the bit rate that recording was set in, the heavily compressed Long GOP format will have this inherent problem due to it's encoding algorithm.

Quite interesting that you do notice that...May I know if you're shooting fast motion objects?

DXNMedia,
Haaa...bro, it's not interesting at all, screwed me up man!!!! So, which means I can do nothing? I shooting a talent who will move around from point to point and do have some action so. Just like he/she move his/her head from left to right, will obviously notice that issue! Can you confirmed that isn't sensor or machine fault just the common issue? or...setting issue? In fact, I'm in a studio with enough lights on the talent and background too. Some said shutter speed 50 for 50i/PAL will solved this? What do you say? I'm using AFC+Face Recognize function in Full HD option.

Never had that problem with my GH2. Should get your camera to Panasonic for a check.

Bamboopictures, don't scary me bro!!! :-! Did you have any clip on youtube or vimeo? I'ld like to have a confirmation from that too. What's your setting? Mind to share your idea? Appreciate!

Hear from you guys soon...many thanks.

 

[sibeiblur]

shutter speed problem I reckoned. Why are you shooting 1/160 shutter and above?

 

[XsenseX]

shutter speed problem I reckoned. Why are you shooting 1/160 shutter and above?

Why would shutter speed be a problem?

Shooting at 1/50 or 1/60 is a 'practice' to emulated film but not a must.

I've shot at 1/2000 and 1/4000 before and its fine. Just doesn't look that nice as movements are slightly more jerky and the water flowing looks very fake

 

[mactreouser]

shutter speed problem I reckoned. Why are you shooting 1/160 shutter and above?

Confirmed that shutter speed issue? I'm really afraid machine fault! So, 1/50 might solved the issue? What bout focusing setting? I was using the photo shooting setting to "freeze/reduce" the motion blur, that's why higher SS for that. But seems wrong!

Why would shutter speed be a problem?

Shooting at 1/50 or 1/60 is a 'practice' to emulated film but not a must.

I've shot at 1/2000 and 1/4000 before and its fine. Just doesn't look that nice as movements are slightly more jerky and the water flowing looks very fake

1/50 for PAL to producing smoother movie but will giving slightly motion blur... Something like that! That's why they don't suggest to goes for 100 & above the result you've received! Unless gonna producing slo-mo while editing then shoot up to 1/100 then speed down to 50% to grab the smooth slo-mo result as I knew!

So bro. Can I hv a look to your precious clip for confirmation?

Thanks all, hear from you guys soon!

 

[XsenseX]

1/50 for PAL to producing smoother movie but will giving slightly motion blur... Something like that! That's why they don't suggest to goes for 100 & above the result you've received! Unless gonna producing slo-mo while editing then shoot up to 1/100 then speed down to 50% to grab the smooth slo-mo result as I knew!

Smooth slo-mo is more with FPS then shutter speed. Of course it co-related but using higher shutter speed doesn't give smoother slo-mo.

Thats why there are 1000fps video cameras to capture slo-mos. Cheers

 

[Jemhadar]

I've no problem with my GH2.

For continuous auto-focus only the 14-140 lens performs better and silent, IMHO.
I don't know about the new "X" lens.

Don't use any auto-focus mode for video.
Set to full manual and use the AF/AE Lock for focus.
That's how I shoot with my GH2.

 

[mactreouser]

Smooth slo-mo is more with FPS then shutter speed. Of course it co-related but using higher shutter speed doesn't give smoother slo-mo.

Thats why there are 1000fps video cameras to capture slo-mos. Cheers

Many thanks!

I've no problem with my GH2.

For continuous auto-focus only the 14-140 lens performs better and silent, IMHO.
I don't know about the new "X" lens.

Don't use any auto-focus mode for video.
Set to full manual and use the AF/AE Lock for focus.
That's how I shoot with my GH2.

Wow...I really wish to watch your video to make sure I can have your result with my GH2 new babe too! C'ld you please send me a link of your movie, youtube or vimeo? Appreciate to your offer and help!

 

[mactreouser]

This is what I mean friend...See and Help...appreciate!

GH2 Motion TEST on Vimeo

 

[Bamboopictures]

Bamboopictures, don't scary me bro!!! :-! Did you have any clip on youtube or vimeo? I'ld like to have a confirmation from that too. What's your setting? Mind to share your idea? Appreciate!

Hear from you guys soon...many thanks.[/QUOTE]

I shoot progressive 720p PAL. A lower shutter speed will have the usual motion blur but that's natural. Persistence of vision phenomenon which makes film looks natural. At high shutter speed, images will have a unnatural sharpening and a harder video edge that looks like interlaced video, even if one shoots progressive.

 

[mactreouser]

Bro.

That's right! When trying to shoot in 1/160, the hard video edge-interlaced video like appear. 720p50 PAL I've tried, pretty nice and smooth result, in fact, it's 720p! What the clip attached above was shoot in 1080i50 in 1/50 SS. Looks great like what 720p did when the editing time base choose to 50fps. It'll be exactly the above clip when time base back to theory-25fps.

What's wrong with that? Blur like that? can't understand! Any suggestion to me for experiment to the smoother motion like 720p did?