Latest post Sat, Jul 19 2014 4:27 AM by Telegram!. 13 replies.
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  • Wed, Jul 16 2014 1:50 AM

    Transcoding GoPro a no-go

    Hi all, hoping somebody here can help us out with this one - transcoding car-mounted GoPro footage is taking eons, and really would like to find a more efficient solution.

     

    Our workflow right now is this, in MC 5.5 (I know): AMA Link both our XDCAM EX main cams and GoPros, then transcode to 14:1 MXFs for offline. The XDCAM is pretty fast, but something about those H.264s bogs down all of our (admittedly pretty old) machines (i.e. this PC I'm typing on is an HP Z400 Workstation w/ Windows 7 Profesh, Xeon W3550 @ 3.07 GHz, 6GB RAM, Quadro FX 3800 GPU). 

     

    Any suggestions out there for what's slowing these down/how to speed them up? Have to stick with the 14:1 for now, but if, for example, there's a way to transcode outside of Avid and fast import, I'm all ears. 

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  • Wed, Jul 16 2014 2:33 AM In reply to

    • jef
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    Re: Transcoding GoPro a no-go

    I would download DaVinci Resolve Lite and test it for transcode.  It can be quite fast.  But it gets it's speed from a beefy GPU.  Not sure how your's will stack up.

    Jef

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  • Wed, Jul 16 2014 6:07 AM In reply to

    Re: Transcoding GoPro a no-go

    GoPro footage is often really long and most is unwanted. Can't you make selects of what you need and then transcode just that?

    Other than that upgrade to V8 and get background transcode. No faster but you can continue to work while it does it.

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  • Wed, Jul 16 2014 6:38 AM In reply to

    • mjolnarn
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    Re: Transcoding GoPro a no-go

    Or maybe use Squeeze or even Squeeze Pro, Squeeze will create DNxHD that will fast import and Squeeze Pro will create ready to use MXF files

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  • Wed, Jul 16 2014 8:26 PM In reply to

    • Sylvain P
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    Re: Transcoding GoPro a no-go

    mjolnarn:

    Or maybe use Squeeze or even Squeeze Pro, Squeeze will create DNxHD that will fast import and Squeeze Pro will create ready to use MXF files

    I tried the Squeeze 9 Pro Trial with AVCDH files and the transcode to DNxHD gave me only error messages.

    So, I don't know if it will work in his case. Maybe he should install the trial version for testing that workflow first.

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  • Thu, Jul 17 2014 12:02 AM In reply to

    Re: Transcoding GoPro a no-go

    jef:

    I would download DaVinci Resolve Lite and test it for transcode.  It can be quite fast.  But it gets it's speed from a beefy GPU.  Not sure how your's will stack up.

    Jef

    Thanks Jef. I'll look into this - the Quadro's we've got may not be great, but I'd think they should be able to help Resolve do better than MC's 1-1.5hrs for a 13-min clip. 

    Pat Horridge:

    GoPro footage is often really long and most is unwanted. Can't you make selects of what you need and then transcode just that?

    Other than that upgrade to V8 and get background transcode. No faster but you can continue to work while it does it.

    At least on this show, that's not really the AE team's call - either the selects suggestion, or upgrading software and hardware. Would that it were. 

    Sylvain P:

    mjolnarn:

    Or maybe use Squeeze or even Squeeze Pro, Squeeze will create DNxHD that will fast import and Squeeze Pro will create ready to use MXF files

    I tried the Squeeze 9 Pro Trial with AVCDH files and the transcode to DNxHD gave me only error messages.

    So, I don't know if it will work in his case. Maybe he should install the trial version for testing that workflow first.

    Re: mjolnarn and Sylvain, I haven't worked with Squeeze before. My only concern with that and/or Resolve would be when we get to uprezzing - say we transcode the GP footage to 14:1 MXFs (do these programs even have this codec?), and then import those, would there be any way to relink to original media for the online? 

     

     

  • Thu, Jul 17 2014 1:52 AM In reply to

    • Harry Invision
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    Re: Transcoding GoPro a no-go

    Hi,

    I do a Series at the moment with a heap of Go Pro, background services is good but still around 3.5 times real time so i hour takes around 3.5 hours...ouch. I have 60 days to ingest with 6 Go pros running. 

    I have Sony XDCAM 500 files 50 bit 25P coming in as well. So I have Adobe Media Encoder running in the background this converts the Go Pro MP4s to XDCAM 50bit 25P this happens quicker than real time you can get another CPU running even quicker, they end up double the file size with no quality loss. You then can drop these into straight into MXF folders or just import much the same time scale in the end. It all happens quicker than realtime....

    I'm at Day 39 at the moment so excuse the jibblerish thearpy is needed...have fun and enjoy...Paul H

    Ps Nice to know some else is having fun with MP4s.

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  • Thu, Jul 17 2014 2:58 AM In reply to

    Re: Transcoding GoPro a no-go

    Alejandro M:

    Hi all, hoping somebody here can help us out with this one - transcoding car-mounted GoPro footage is taking eons, and really would like to find a more efficient solution.

     

    Our workflow right now is this, in MC 5.5 (I know): AMA Link both our XDCAM EX main cams and GoPros, then transcode to 14:1 MXFs for offline. The XDCAM is pretty fast, but something about those H.264s bogs down all of our (admittedly pretty old) machines (i.e. this PC I'm typing on is an HP Z400 Workstation w/ Windows 7 Profesh, Xeon W3550 @ 3.07 GHz, 6GB RAM, Quadro FX 3800 GPU). 

     

    Any suggestions out there for what's slowing these down/how to speed them up? Have to stick with the 14:1 for now, but if, for example, there's a way to transcode outside of Avid and fast import, I'm all ears. 

    Can you get your hands on a GoPro camera to play back the files? Perhaps using an HDMI-to-HD-SDI AJA converter box playing back in real-time (into an Avid Nitris DX, XDCam recorder, etc.) would work & wind up being faster.

     

     

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  • Thu, Jul 17 2014 6:21 AM In reply to

    • mjolnarn
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    Re: Transcoding GoPro a no-go

    Sylvain P:

    mjolnarn:

    Or maybe use Squeeze or even Squeeze Pro, Squeeze will create DNxHD that will fast import and Squeeze Pro will create ready to use MXF files

    I tried the Squeeze 9 Pro Trial with AVCDH files and the transcode to DNxHD gave me only error messages.

    So, I don't know if it will work in his case. Maybe he should install the trial version for testing that workflow first.

    Hi Sylvain, long time, hope you are doing well.

    Regarding Squeeze you are doing something wrong, no idea what you are doing though, there is a quicktime bug when encoding movs to physical drives 1 tB and larger but that shouldn´t affect mxf files

     

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    Tomas 

     

  • Thu, Jul 17 2014 7:48 AM In reply to

    • mjolnarn
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    Re: Transcoding GoPro a no-go

    Harry Invision:

    this converts the Go Pro MP4s to XDCAM 50bit 25P this happens quicker than real time you can get another CPU running even quicker, they end up double the file size with no quality loss.

    Sorry to bring the bad news here but transcoding one long gop codec to another long gop codec will give you quality losses, the term is secondary long gop degeneration.

    The XD cam 50 codec might do well as a final delivery codec coming from a project with, maybe DNxHD 185, when using this codec as a middleman you will never get a better quality than this if you aren´t using this codec as an offline codec and relinks to the origin in the very end, I don´t think that this is possible with goPro files and AME however.

    As you seem to be satisfied with the quality and it saves you time I have nothing to argue about that however but time seems to be more important than possible quality losses here in this project with all these amount of media.

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    Tomas 

     

  • Fri, Jul 18 2014 1:12 AM In reply to

    • Harry Invision
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    Re: Transcoding GoPro a no-go

    Yes Mjoinarn,

    That is right, but at the beginning of the process I tested both ways and apart a slight lift in blacks, you can't pick any quality loss. A wipe between sources shows nothing. We are talking Go Pros MP4s.

    My end project in total is around 7TBs and with quick turnaround weekly to a Network of 10 x 1 hours, I don't bother with offline res, storage is cheaper than time. End delivery is XDCAM 50  Op 1 MXF anway.

    Works well for me...Transcoding has always chugged with MP4s...and if anyone from Go Pro reads this give us Time of Day code please!.....Harry

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  • Fri, Jul 18 2014 10:09 PM In reply to

    Re: Transcoding GoPro a no-go

    GoPro has their own software availalbe for free that you can use to transcode it. http://gopro.com/software-app/gopro-studio-edit-software

    I'm surprised by the number of people using GoPro footage that aren't aware of this.

     

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  • Sat, Jul 19 2014 4:17 AM In reply to

    • BarkinMadd
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    Re: Transcoding GoPro a no-go

    And what's cool about that is that you transcode to a CineForm codec that AMA links and edits very quickly in MC with the added benefit of meta data that allows you to change exposure and color on-the-fly from outside MC. 

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  • Sat, Jul 19 2014 4:27 AM In reply to

    Re: Transcoding GoPro a no-go

    Does a fast modern PC and this software get your GoPro stuff into Avid MXF faster than real-time?

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