Wednesday, June 11, 2014

Re: [Avid-L2] QT Change and Go Pro Footage?

 

Hi John:

  I'm seeing some GoPro footage on my current doc -- from a GoPro Hero3+.  These are producing H264 .mp4 files.  No problem with AMA import using MC v.7.0.x.  I'm looking at 2.7K files mostly, though, and these will not play back smoothly on a mid-2010 Mac Pro "Nehalem" dual-2.66 GHz 6-core system using AMA.  They transcode fine from the AMA imports, though.

   I don't think these files have any real timecode -- don't see any in Quicktime 7, and when brought into the Avid, the start timecode always seems to be equal to the file creation time, and the end timecode matches the file modification time -- as you'd expect if the files had no embedded timecode.

   You can't set any sort of filename prefix in the camera; filenames are all GOPRxxxx.mp4 ('xxxx' = file number) or a couple variations thereof.  You might consider renaming them to add a unique prefix (I suppose Bouke's tool to add a card name would give you equivalent function.)

   There are some unusual raster options, like 2716x1440 (17:9 ) and 1920x1440 (4:3).  The camera also does 4K, but only at 12 fps.

   Some footage from a different GoPro Hero 3+ (with different firmware) has a bunch of .THM and .LRV files along with the .MP4 files -- .THM are timestamps, I suppose.  Not sure about the .LRV.

   I'm not using Dynamic folders, but the background transcoding seems to work reasonably well on v7.

Cheers,
--Michael


On 2014-06-10, 6:10 PM, John Moore bigfish@pacbell.net [Avid-L2] wrote:
 
I have QT change and use it to add time code and burn ins.  I'm aware that it will also take certain file based media and help organize it and add .thm based time code.  In my experience adding time code and burn ins there are some files  that don't work with QT change even though they are .mov files.  I have a client that uses some Go Pro footage and their process is to make the Go Pro footage time code sequential.  I assume that means they manually alter the time code once in Avid.  This sounds like it could be a job better handled by QT change to give the clips more of a TOD time code based on the .thm info, if that exists in Go Pro footage.  I have heard that older Go Pros didn't have time code and newer ones do.  I'm assuming that my client gets Go Pro footage without time code or does Avid just ignore it?  In talking with AEs at a few places it seems sometimes it does and sometimes it doesn't when it gets into Avid.  I've also heard that at a time Go Pros would not AMA and had to be imported traditionally, is this correct and is this still true?  I don't have any Go Pro media handy to play around with.  Hopefully I can get some from this client and experiment.  Any tips or suggestions would be appreciated.

Also does version 7 and the dynamic folders offer any significant improvement in Go Pro media handling?
 
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net

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Posted by: Michael Brockington <brocking@sfu.ca>
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