Playback issue at DVinfo.net

Go Back   DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC 4K Pro Handheld Camcorders

JVC 4K Pro Handheld Camcorders
GY-LS300, GY-HM200, HM170 and HM-Q10 recording 4K Ultra-High Definition video.


Reply
 
Thread Tools Search this Thread
Old March 22nd, 2016, 02:03 PM   #1
Regular Crew
 
Join Date: Feb 2010
Location: Halifax, Nova Scotia, Canada
Posts: 84
Playback issue

Help!

So I received my LS300 last week and have been doing some test shooting with it. I'm having an issue with playback on my computer, the video seems to skip frames which is very noticeable during pans. I've tried different frame rates, resolutions and codecs. I've tried QuickTime, WMP, and VLC. I've compressed web videos in Sony Vegas....and still get stutter steps during playback. I tried three different computers at home(2 PC and a MacBook Pro). I even took the card to an editor friend who edits on FCX and saw the same issue.

Could the internal clock/sync be off in the camera?

Scott Berrington
Scott Berrington is offline   Reply With Quote
Old March 22nd, 2016, 02:19 PM   #2
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

Can you maybe shoot a few seconds of testfootage showing the problem and make the clip straight from the card available for download?
Noa Put is offline   Reply With Quote
Old March 22nd, 2016, 05:05 PM   #3
Inner Circle
 
Join Date: Dec 2005
Location: New York City
Posts: 2,615
Re: Playback issue

Interestingly I was just working with footage from an HD camera that had a random recording error so your worry isn't unwarranted. The footage had to be rescued with a free program called MPEGStreamclip as every other program would get stuck on the frame breaks and not even recognize the footage. Even then I could only rescue the footage around the frame breaks as the breaks would halt the conversion from mp4 to ProRes.

First of all, don't play 4K directly off the card if that's what you've been doing. Card readers may not all have the ability to play the footage fast enough for smooth playback. Second, you should be sure that the video cards in the computers you are using have the ability to decode h264 4K fast enough. This is one of the reasons that programs like Final Cut Pro X have a proxy option.

To see if the footage is OK, load the footage in any suitable player and go frame by frame with the keyboard for several seconds worth of footage. If the recording is OK every frame will be there. If the frames skip or there is a frame of digital distortion then, yes, the camera is broken.
__________________
William Hohauser - New York City
Edit/Camera/DCP production/Animation
William Hohauser is offline   Reply With Quote
Old March 22nd, 2016, 06:25 PM   #4
Regular Crew
 
Join Date: Feb 2010
Location: Halifax, Nova Scotia, Canada
Posts: 84
Re: Playback issue

I tried 4K, HD(50mbs, 35Mbs) and AVCHD(28Mbs). I tried to play off the card(Sandisk U3) on 2 PC's, a brand new MacBook Pro, and a new Mac Pro. We saved the media to the Mac Pro SSD and still had the issue. Even compressing the shots to small web videos wouldn't play smoothly.

I went through a few of the shots frame by frame, all the frames were there with no picture breakup.

I've tried to upload a sample here, but the website won't allow me to do that.

Here is a Vimeo link.


Last edited by Scott Berrington; March 22nd, 2016 at 07:21 PM.
Scott Berrington is offline   Reply With Quote
Old March 23rd, 2016, 01:35 AM   #5
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

You can upload the raw file to a google drive, hotmail one drive or you can use some free cloud services. It's better if we can have a look at a raw file instead of one that has been passed through a NLE or a service like vimeo.
Noa Put is offline   Reply With Quote
Old March 23rd, 2016, 01:39 AM   #6
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

Or is the original file on vimeo that can be accessed through the download button straight from the card?
edit: just see it's not as it has a 12mbs bitrate.
Noa Put is offline   Reply With Quote
Old March 23rd, 2016, 01:44 AM   #7
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

I just downloaded the lower bitrate file to my pc and had a look at that, it appears to play smooth when you are panning? Not sure if others see this as well?
Noa Put is offline   Reply With Quote
Old March 23rd, 2016, 03:02 AM   #8
Regular Crew
 
Join Date: Feb 2010
Location: Halifax, Nova Scotia, Canada
Posts: 84
Re: Playback issue

Let's try this.

https://drive.google.com/open?id=0Bz...TRMSGVmcG1lYlE
Scott Berrington is offline   Reply With Quote
Old March 23rd, 2016, 03:57 AM   #9
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

The 50mbs file was smooth while panning, the 35mbs file not, if you want I can do the same today with my ls300 so we can see if it is a "bug" or not.

edit: just looked at the files again and now the 35mbs file was smooth also. Not sure what's going on here.
Noa Put is offline   Reply With Quote
Old March 23rd, 2016, 05:26 AM   #10
Major Player
 
Join Date: Jul 2003
Location: Leeds, UK
Posts: 660
Images: 10
Re: Playback issue

I've put your two files into FCPX.
Playing back in the browser had slight stuttering which went away when FCPX transcoded them into ProRes.

Using a 25p timeline I set the clips to 'Automatic Speed' to retime the 29.97 down to 25fps.
Again both clips played back fine.
__________________
FCPX/LS300/EX1/FS100/GoPro/Vinten/HotHead/Jib/Track/Dedos/Lightstorm/Coollights
Duncan Craig is offline   Reply With Quote
Old March 23rd, 2016, 06:03 PM   #11
Regular Crew
 
Join Date: Jan 2006
Location: Lynnwood, WA
Posts: 89
Re: Playback issue

Quote:
Originally Posted by Scott Berrington View Post
I tried 4K, HD(50mbs, 35Mbs) and AVCHD(28Mbs). I tried to play off the card(Sandisk U3) on 2 PC's, a brand new MacBook Pro, and a new Mac Pro. We saved the media to the Mac Pro SSD and still had the issue. Even compressing the shots to small web videos wouldn't play smoothly.

I went through a few of the shots frame by frame, all the frames were there with no picture breakup.

I've tried to upload a sample here, but the website won't allow me to do that.

Here is a Vimeo link.

Test on Vimeo
Scott, Thank you very much for this thread. I absolutely see it in your video. I have the same exact problem and I'm at my wits end. You can see in my signature I have a lot of great gear. I bought my iMac 5K retina computer (fully loaded) thinking I would have no problem editing HD and 4K video. I was wrong, I cannot pan, tilt, or zoom without this horrible judder. After searching the internet and consulting my friends who do not have this problem I have come to the conclusion that it is graphics card related. Our cards not everyone else's.
__________________
Michael Stevenson Sony FS7/ FS5/ A7s/Glidecam/Movi M5/Phantom 3 Pro/ifootage slider/Senheiser/FCPX/Premiere Pro/And a whole lot more
Michael Stevenson is offline   Reply With Quote
Old March 23rd, 2016, 09:20 PM   #12
Regular Crew
 
Join Date: Feb 2010
Location: Halifax, Nova Scotia, Canada
Posts: 84
Re: Playback issue

Michael,

I don't think it's a graphics card issue, but I could be wrong. I've tried all the frame rates and codecs on the camera with four different computers. Even editing and compressing shots to YouTube videos will playback with stutter. Tomorrow I'll try some test footage on another system with Adobe Premier.

Fingers crossed.
Scott Berrington is offline   Reply With Quote
Old March 24th, 2016, 01:58 AM   #13
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

I just looked at your videos again (I use vlc player) and both play fine, I don't get any stutter. I took your native files into edius and rendered a h.264 mp4 file and placed this on my vimeo account, can you have a look to see if it still stutters?

password: test
vimeo.com/160203257
vimeo.com/160203256
Noa Put is offline   Reply With Quote
Old March 24th, 2016, 06:07 AM   #14
Regular Crew
 
Join Date: Feb 2010
Location: Halifax, Nova Scotia, Canada
Posts: 84
Re: Playback issue

Hi Noa, just took a look at your Vimeo links and I'm still seeing the stutter at my end...strange. JVC has posted a new firmware(v0204-137) update just yesterday. I'll update the camera and see if that makes a difference.

Thanks for your help.

Scott
Scott Berrington is offline   Reply With Quote
Old March 24th, 2016, 06:09 AM   #15
Inner Circle
 
Join Date: Jun 2007
Location: Belgium
Posts: 9,064
Re: Playback issue

Yeah it's weird because when I look at the vimeo videos I uploaded they don't stutter. Do you have a link to that firmwareupdate because acc to jvc it was going to be released in April?
Noa Put is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC 4K Pro Handheld Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:39 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network