Sony PXW-Z150 Native XAVC 4K Long GOP and Premiere Pro

Question

HiI do media for a Football Club in Sydney Australia, and we have been offered funding from our sporting league to cover some new video equipment. The perfect choose as far as shooting looks like the Sony PXW-Z150.However doing research on forums and the like, there appears to be or has been ingesting and editing compatibly issues with this camera's particular version of XAVC. As I understand it, this is long GOP format that sits in the middle hierarchy of the 3 Sony XAVC formats and is the format that is more likely to have ingesting or editing issues. I am assuming that the other non-4K formats the camera puts out would not have any issues?I currently have an old Mac Pro 2009 with its original video card which I may look at replacing (full details are below). I also have a 2011 Mac Mini as a backup. I'm trying to determine whether I will have issues editing native XAVC files with my machine. If this is the case, I may have to go looking again for a camera that has similar features and allows a workflow without having to transcode or not shoot in 4K in a quick turnaround scenario and rely on transcoding. I should add that I'm looking for compatibility with Premiere Pro CC because most semi-pro or pros use it here. However, I also have access to a purchased copy of AVID and FCPX. I would be very appreciative of any advice you good people could give me.Many ThanksSteveMac Pro (Early 2009)OS X El CapitanProcessor: 2 x 2.26 GHz Quad-Core Intel XeonMemory: 32 GB 1066 MHz DDR3 ECCGraphics: ATI Radeon HD 4870 512 MBModel Identifier: MacPro4,

R Neil Haugen · Answer

4K and long-GOP are not a match made in Heaven for editing. Being as the CPU has to manually calculate 9-14 frames for every one complete frame stored in the file, it's incredibly CPU intensive. That's in ... take a complete frame, de-compress, pass on, store to RAM. Call up data for the next frame from the matrix of changed pixels, recall the full frame from RAM, compute the changes, de-compress & pass on plus store to RAM. Rinse & repeat.One of the people who make high-end colorist editing rigs ... WAY above most video editing ... says that when he has a colorist say he's got to work with 4k long-GOP, it means ... a CPU/RAM subsystem with robust cores/threads capabilities, besides other things. Vastly easier he tells them to transcode the media overnight.So ... yes, there are people working 4k XAVC ... you'll probably need to create proxies on ingestion though ... and make a Cineform one as that is intraframe and goes through a CPU easy as all get out. NEVER use an interframe such as mov or mp4 for proxies. Smaller files sizes, but again ... a lot more work in the CPU.Neil

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