Premiere Pro export "use previews"

[John Heiser]

Is there any advantage to checking "use previews" when exporting media from Premiere Pro? I do mostly short form (1-5 minutes) and don't see much of a time difference. Is there a quality difference?

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john heiser | senior video editor

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o2ideas.com

 

505 20th Street North, Suite 1500

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[Jefry Huey]

Here is what I have learned about that.

First, you need to set up your sequence preview settings to the codec you will deliver.  Then when you export your project, make sure you have "Use Previews" selected.  This tells Premiere to use any renders (Previews) you did while editing.  Otherwise, Premiere will NOT use them automatically and will render them yet again.  On a simple project, this may not be a big deal, but if you spent the time to render something once (because it would not play back realtime) why do it again?

The key is having the preview codec match the deliver codec, other wise it renders all over again. 

Jef

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Jef Huey

Senior Editor   |  Henninger Media Services

Arlington, VA  |  703-243-3444

 

Take a look at my work.
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[John Heiser]

Thanks, Jef. That makes sense.

So, I guess some best practice recommendations for setting up sequences would be next for me.

• My understanding is that it's good to set the sequence to the source material, for less stress on the system when playing back. The more realtime, the better, right? My habit has been to drag a shot onto the New Item icon and let Premiere help me. Often times, that has resulted in an Arri sequence - even with AVCHD stuff we get from our corporate clients. The preview format and codec are grayed out for Arri sequences. Hmm.
• I've had a lot of PPro lockups/crashes. A lot - sometimes 5 or 6 a day. I'm trying to narrow down what may be the cause (hinky Wacom driver, heat, other apps running). On a recent project, I thought it might be all those AVCHD MTS files, so I quickly transcoded to ProRes LT. When dragging one of those files to the new item icon, it makes a Blackmagic Uncompressed sequence. The preview codec is not grayed out, so I could set it to my delivery format (I make PRHQ internal masters). But that seems like maybe a lot of drive space during the course of a project. Thoughts?
• Is there a "best most of the time" sequence format? Or is jumping around per-project based on source material the way to go?
  

This all seemed simpler with DS. (sigh)

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john heiser | senior video editor

p: 205.949.9513

o: 205.949.9494

o2ideas.com

 

505 20th Street North, Suite 1500

birmingham, alabama 35203

http://vimeo.com/johnheiser

On Thu, Jan 19, 2017 at 9:53 AM, Jefry Huey <jh...@henninger.com> wrote:

Here is what I have learned about that.

First, you need to set up your sequence preview settings to the codec you will deliver.  Then when you export your project, make sure you have "Use Previews" selected.  This tells Premiere to use any renders (Previews) you did while editing.  Otherwise, Premiere will NOT use them automatically and will render them yet again.  On a simple project, this may not be a big deal, but if you spent the time to render something once (because it would not play back realtime) why do it again?

The key is having the preview codec match the deliver codec, other wise it renders all over again. 

Jef

On 1/19/17 10:35 AM, John Heiser wrote:

Is there any advantage to checking "use previews" when exporting media from Premiere Pro? I do mostly short form (1-5 minutes) and don't see much of a time difference. Is there a quality difference?

----

john heiser | senior video editor

p: 205.949.9513

o: 205.949.9494

o2ideas.com

 

505 20th Street North, Suite 1500

birmingham, alabama 35203

http://vimeo.com/johnheiser

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Jef Huey

Senior Editor   |  Henninger Media Services

Arlington, VA  |  703-243-3444

 

Take a look at my work.
http://vimeo.com/album/3037796

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[Jef Huey]

You bring up a good point John.  I have not really nailed that question down yet.  I will often have ProRes sources in a ProRes Preview sequence and still have yellow lines in the timeline.  Still trying to figure that out.

Jef

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[John Heiser]

On Thu, Jan 19, 2017 at 11:47 AM, Jef Huey <jlhu...@gmail.com> wrote:

You bring up a good point John.  I have not really nailed that question down yet.  I will often have ProRes sources in a ProRes Preview sequence and still have yellow lines in the timeline.  Still trying to figure that out.

Here's an interesting video posted to the "Moving to Premiere Pro" page on Facebook. (a lot of noise there, but still useful sometimes) that explains sequence setup pretty well. He basically says, "for fast exports, setup a Custom sequence and set the previews to Cineform or ProRes."

https://vimeo.com/152529716

The time difference is remarkable, and I just did my own test. I set up a Custom sequence with PRHQ previews, put thirty seconds of footage on the timeline and added S_Cartoon to turn the time line ribbon red. Rendered the effects (render time about 90 seconds) and hit Export. With "Match Sequence Settings" and "use previews," the thirty-second export took about two (2) seconds. By unchecking "use previews," the time estimate was closer to three minutes (I didn't finish the export).

More testing might be interesting.

[John Heiser]

On Thu, Jan 19, 2017 at 12:00 PM, John Heiser <jphe...@gmail.com> wrote:

More testing might be interesting.

Sequence length: 1:50

Mostly yellow timeline, three red sections (name supers) rendered.

Export "Match Sequence Settings" - use previews - 1:05.
Export "Match Sequence Settings" - use previews unchecked - 1:30.

Rendered the entire sequence to green (1:07)
Export "Match Sequence Settings" - use previews - :08.

Export h264 "Match Source - high bitrate" - 1:40.

Pretty cool. So the info in the tutorial about having your timeline rendered green for smooth playback is totally relevant to how long the export takes when matching the sequence settings - in this case, for generating a master file. But making an approval file still takes a bit of time.

[Trevor A]

Yes absolutely- best to have a custom sequence preset (e.g. 25fps, Progressive, 1920x1080) and with 'previews' (=renders) set to delivery codec (e.g. ProRes/DnxHd etc).

Then when exporting, checking 'use previews' will use those renders IF they match output codec. Much quicker, if you've been rendering as you go. (Adobe renders are pretty good at not getting unrendered.)

For H264 usually best to export a full res to a watch folder that Media Encoder picks up & transcodes.

If you don't render as you go to delivery codec then you may as well choose H264 in PP export settings & 'queue' to export in background via AME.