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Using Sorensen 6 and Symph Nitris DX
Have just begun to investigate using Sorensen 6 for exports. One thing I notice:
There are a bewildering amount of options to use for MP4 exports or QTs.
If I export an HD-1080i sequence (1920X1080) as a regular QT movie (not using Sorensen), this QT file then is able to be imported by another of our Avids with no signal degredation.Yet,if I export the same sequence using Sorensen Squeeze, and then import the exported file into Sorensen Sqz 6 ,using the QT 480p (16:9) and Video MC H.264 format (for instance)…I see a large singal degrade when I then import the file back into my Avid (or somebody else imports it) after SS6 is done converting it.
And, no matter which format option I choose (QT or import), I see the same signal degredation…or worse. Pix always looks soft and has a “low-rez” appearance to it.
Again,I’m a newbie to Sorensen…does anyone know what is an optimal setting to use when importing hi-rez exported QT files into Sorensen? I’d love to be able to use a Sorensen-finished file and have it be “broadcast-ready” in appearance. Not to mention, since SSQz makes the files smaller, that’s great for sending the files via email….another reason I’d like to use Sorensen.Thanks for any tips. BY the way: we use the DNX 145 codec with our 1080i work in our Avids. I don’t see any matching codecs in DD6 for this particular codec. Should there be one? OR…is it simply better to keep using exported QT files directly to import elsewhere in our Avids and NOT use SS?
Rob NYC
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5 Replies
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What exactly are you expecting from a 480p H264 file? It is, by its very nature, lower res and more compressed than your 1080i DNxHD footage. It will also be converting the colour space to RGB. You shouldn’t be importing this format back into Avid. It is a delivery format only and shouldn’t be used as a backup. A video mixdown, consolidation of you sequence or just a QT exported from Avid with DNxHD compression (in 709 space), are the only things you should consider as a backup of your sequence for later use.
Andy
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Thanks for the reply. As I said,I am NEW to Sor Sqz,relatively.I was thinking that Sorensen was simply another option to use for converting sequences for later importation.
We already use the export-to-desktop server method for importing HD files elsewhere. Good to know….I was simply looking for alternate methods and investigating Sorensen.So…let me get this straight…Sorensen should NOT be used for backing up HD Avid sequences or converting these sequences for later use (and expecting them to look broadcast-ready)?
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I’m not going to say ‘don’t use Sorenson for xyz’ but if it were me and I needed to preserve a sequence for re-editing at a later date I would either export it as an AAF with handles so I could bring it in as an editable sequence or I would export it as a mixed-down master using export “same as source” setting. If your footage has been acquired on XDCam and ‘same as source’ is not possible then Animation codec at best possible resolution settings would be my choice… but that’s just my take on it.
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Sorenson Squeeze is primarly for compressing for delivery, not for storage. Video should be compressed as little as humanly possible untill delivery. Animation and Uncompressed are nice but usually impracticle because of size. I would say in most cases ahigh bitrate DNxHD would be sufficient.
Andy
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Thanks for the responses folks!
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