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TOPIC: What is a *traced* sequence?

What is a *traced* sequence? 1 year, 10 months ago #187526

  • Sylvain Leroux
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I use Lightworks for a couple of years now, but I still don't understand what exactly is a Traced sequence. I can see it in the menus and you sometimes mention them in your answers, but it is not clear what they are and what is their primary purpose. And it seems hard to find a definite answer on the forum.

So, what is a traced sequence, and what is it for?
LightWorks 14.1 on Linux Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux
GeForce GT 445M with Nvidia drivers 340.24
Intel(R) Core(TM) i7 CPU Q 840 @ 1.87GHz (4 cores + hyper-theading)
Medias on an NFS share (slowww!)

Re: What is a *traced* sequence? 1 year, 10 months ago #187529

  • briandrys
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A traced sequence is one where subclips are replaced with the source media. This allows operations that may require the source media, for example transitions, where the subclips are not long enough to allow sufficient overlap. Another would be if you need to lengthen the subclips in the sequence timeline using trim.

Subclips are complete in themselves, so don't have any more material than you've selected when making them.

The V10 user guide says:

"This feature allows you to trace back from subclips to their original clips. Where
an edit is made of subclips, the Trace command produces a version of the edit
with the original clips as sources instead of the subclips.
The edit has the word “(trace)” appended to the name. This feature can be
regarded as an undo for subclips."
Last Edit: 1 year, 10 months ago by briandrys.

Re: What is a *traced* sequence? 1 year, 10 months ago #187539

  • Sylvain Leroux
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Thank you for the reply, Brian.

I don't use subclips much so I didn't have encounter previously the need for traced sequences. But this also solved another issue I actually had: "how to get back the original sequence used to create a print?"

If I'm not too wrong, this will work:

1) Make a sequence from a print
2) Make a traced sequence from the sequence created in (1)

After (2) you have a get back a sequence similar to the one having served to create the print.

EDIT: this seems to work with syncs too!
LightWorks 14.1 on Linux Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux
GeForce GT 445M with Nvidia drivers 340.24
Intel(R) Core(TM) i7 CPU Q 840 @ 1.87GHz (4 cores + hyper-theading)
Medias on an NFS share (slowww!)
Last Edit: 1 year, 10 months ago by Sylvain Leroux.

Re: What is a *traced* sequence? 1 year, 10 months ago #187544

  • Sylvain Leroux
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One more question regarding traced sequences, once they are created, they behave like "normal" sequences? At least that's what it seems since when I insert subclips into a traced sequence it is not automatically replaced by the original clip. Or am I wrong?
LightWorks 14.1 on Linux Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux
GeForce GT 445M with Nvidia drivers 340.24
Intel(R) Core(TM) i7 CPU Q 840 @ 1.87GHz (4 cores + hyper-theading)
Medias on an NFS share (slowww!)

Re: What is a *traced* sequence? 1 year, 10 months ago #187560

  • jwrl
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A traced sequence is an ordinary sequence. If you add a subclip to it you will get a subclip, and will need to perform the trace again, creating a new sequence.

Re: What is a *traced* sequence? 1 year, 10 months ago #187718

  • Sylvain Leroux
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Thanks for having confirmed that jwrl. Indeed, traced sequences and "ordinary" sequences appear with the same red ribbon in the bin, so I suspected they were the same kind of object once created.
LightWorks 14.1 on Linux Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux
GeForce GT 445M with Nvidia drivers 340.24
Intel(R) Core(TM) i7 CPU Q 840 @ 1.87GHz (4 cores + hyper-theading)
Medias on an NFS share (slowww!)
Last Edit: 1 year, 10 months ago by Sylvain Leroux.
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