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Field Flicker JVC GY 700 FCP 7

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David Neumann
Field Flicker JVC GY 700 FCP 7
on Jul 20, 2014 at 6:07:03 pm
Last Edited By David Neumann on Jul 20, 2014 at 6:07:43 pm

Hi All,

I'm in the final stages of editing a multi-part program and can't shake a persistent field flicker problem. I've submitted edits to the network and they keep seeing 'flickers'. Apologies for the length of this post. Basically I want to make the flicker stop. Here are the details.

Most of the flicker is seen with footage shot by JVC GY 700. Project is PAL. 90% of footage shot in PAL. The rest was converted using Mpeg Sreamclip. They've seen flickering with both PAL and converted footage.

Footage from JVC GY 700: Apple XDXCAM EX 1080i50/25fps. The camera produces .mov files which I can import directly to my FCP 7 project. No Log and Transfer necessary. http://www.pro.jvc.com/prof/attributes/features.jsp?model_id=MDL101851

My Sequence Settings: 1920 x 1080, HDTV 1080i50, Square, Upper, Compressor XDCAM EX 1080i50.
So, sequence matches the footage settings.

Exports: This is how I've exported the episodes/sequences the network has reviewed: Export/Quicktime movie/ Current Settings (audio and video) + make movie self contained. This gives me an .mov file with these attributes: Apple XDAM EX 1920 x 1080i50 (35 mbs/VBR), 25 Fps

I then make H.264 .movs from the Apple XDCAM EX file from FCP7 using Media Streamclip. 1920 x 1080, 25 fps

Here's a sample "flicker" from a frame taken from original camera clip.


Here what a sample "flicker" from a frame looks like in my FCP record/canvas window


I did a test in case this was a field order problem.
1) Export the sequence as Quicktime movie using its source settings: XDCAM EX 1080i50.
2) Export the XDCAM EX 1080i50 Quicktime movie as an Apple ProRes 1920 x1080 50 422 movie. De-interlace the video.
3) Export the ProRes 422 De-interlaced movie as 50 fps, H.264 Quicktime movie. Interlace video. Upper field dominance.

The client still noticed Flickers in the Test export I did. Any thoughts advice, direction greatly appreciated.

Cheers,


David


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Dave Farrants
Re: Field Flicker JVC GY 700 FCP 7
on Jul 21, 2014 at 9:00:56 am
Last Edited By Dave Farrants on Jul 21, 2014 at 9:17:53 am

Do you get the same 'flicker' problem if you use Compressor to make your H.264?

I use a JVC700 with the same settings as yours throughout and have never seen the problem you describe using Compressor (or sometimes Handbrake).

MpegStreamclip is a great program used by just about anyone involved in producing video of any sort but, it's not been updated since 2008, I just downloaded the latest version (1.9.3b8) to check - Created 20th Aug 2008!

Web - http://www.foxvideo.co.uk
Blog - http://foxvidpro.blogspot.co.uk/


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