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Max streams of DNxHD with Multicam
Can’t seem to find a published spec on this.
Old reliable was 10:1m (or similar) for SD. Multicam via AMA is not guaranteed and/or sanctioned by Avid (although, admittedly, many people are getting away with XDCAM).
Thus, for this client, we need Avid DNxHD files for an offline HD multicam edit – and ensure we can get 9+ angles. Conform will be done later to the camera original high res files.
For DNxHD, the lowest res is DNxHD36 (unless we do some console tweaking…) Provided the machine is a new Mac Book Pro or Mac Pro, does Avid have any performance guidelines for multicam with DNxHD?
That’s for a “qualified” workflow. I would, however, like to hear of unsanctioned workflows.
How many streams are users out there getting with XDCAM clips? (and to beat you to the punch, since this is only a low res version to edit with, and XDCAM is not the high res file, the XDCAM proxy AMA workflow is null and void). We are only looking to generate some kind of low res to do multicam with that is HD.
Input is appreciated!
~Michael
.: michael kammes mpse
.: senior applications editor . post workflow consultant
.: audio specialist . act fcp . acsr
.: michaelkammes.comHear me pontificate: Speaking Schedule .
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9 Replies
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9+ ?
That seems like a lot…never used more than a few streams, but my take on it nevertheless:
At 36 Mb the datarate isn’t killing you.
(at 8 streams you will be at a lousy 36 MByte a sec, for 9+ and sound you still will be under 50 MB / sec.
That is doable of course.)The hard part will be uncompressing all that pixels for display.
I would test. And, if it fails, why not have an SD codec for the multicam switching (you’ll be looking at thumbnails anyway) and the same media in HD for the full screen client monitor review.
Requires relinking quite often, but that should be painless.
Besides, depending on content, blown up DV might look better than heavilly compressed HD…
Bouke
https://www.videotoolshed.com/
smart tools for video pros -
I’m looking for an onset solution to generate SD multicam Avid files (10:1m, for example) in Real Time, to complement the HD being recorded for onset editing. I cannot seem to find a solution that can do this off a baseband source, thus I am looking for a way to do HD…and need to see if other users are doing 9+ streams/angles of multicam 🙂
~Michael
.: michael kammes mpse
.: senior applications editor . post workflow consultant
.: audio specialist . act fcp . acsr
.: michaelkammes.comHear me pontificate: Speaking Schedule .
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Mitch Jacobson has written a book on the subject.
There are options to capture and even edit while capturing.
But capturing 9+ streams in two different resolutions aint cheap.(well, unless you build your own Ingex system, better hope you’re not in NTSC country…)
Bouke
https://www.videotoolshed.com/
smart tools for video pros -
ooops…
I’ve almost forgot…
If you use LiveCut, you can have an EDL ready to relink after the capture.
(thus, each cut / dissolve is on your timeline, but from iso taped material so you can alter things.This works with a good old fashioned EDL, so you won’t end up with a multicam session.
(but that IS possible in FCP though!)Current version is 8 inputs only, but that can be changed.
Have a look here:https://www.videotoolshed.com/product/29/livecut/3
Bouke
https://www.videotoolshed.com/
smart tools for video pros -
I’m in the same case to find a codec and the best workflow with 9 cam in dvcpro HD or XDCam.
Do you find a solution now ? -
Currently i’m doing 9 streams without problems (well, transcoded down to DV as my storage isn’t that fast)
From theory, (have not tried it) you can have multple banks, as Avid only displays 9 at the same time.
That of course makes it a challenge how to group the cams so you can have everything you need at your fingertips.Bouke
https://www.videotoolshed.com/
smart tools for video pros -
I do have a solution that is being used by a few TV shows here in Hollywood.
Shoot XDCAM HD
As you know, XDCAM HD generates low res audio and low res video (proxy) and high res audio and high res video.Editing with low res A&V is problematic, as the audio is horrible. If you use NLTek’s SAT Auto Ingest, the software will marry low res video to high res audio, and generate compliant media for Avid.
Edit, then relink to the high res video. Easy.
The codec is lightweight enough that I can do 9 way multicam on an iMac with zero problems. (haven’t tried more).
~Michael
.: michael kammes mpse
.: senior technology & workflow consultant
.: audio specialist . act fcp . acsr
.: michaelkammes.com
.: twitter: @michaelkammes
.: facebook: /mkammesHear me pontificate: Speaking Schedule .
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Michael,
Before Sat there was a tool from me that could do this,
but Avid has it build in itself nowadays…Bouke
https://www.videotoolshed.com/
smart tools for video pros -
Yup, thanks Bouke – I believe I recall seeing it on your site some time ago.
Avid handles the media a bit differently than SAT AI, and SAT AI tends to give more flexibility than the built in toggle inside Media Composer.
.: michael kammes mpse
.: senior technology & workflow consultant
.: audio specialist . act fcp . acsr
.: michaelkammes.com
.: twitter: @michaelkammes
.: facebook: /mkammesHear me pontificate: Speaking Schedule .
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