Known Participant

Question

Premiere keeps “Rendering Required Audio Files” for my entire timeline on every export

Forum|Forum|8 months ago
October 31, 2025
5 replies
513 views

Hi everyone,

I’m really stuck with something and it’s driving me crazy.

I have a long timeline with all of my dailies for an ongoing project, many hours long. Whenever I try to export even a very small selection (via In/Out), Premiere forces a “Rendering Required Audio Files” process that appears to go through the entire timeline, not just the portion I’m exporting.

It does this every single time I export, even if:

I made no audio changes
I already exported the sequence yesterday
I’m only exporting a few seconds

It looks like Premiere is regenerating audio previews for everything before it will allow the export to start. This adds anywhere from 15–30 minutes (or more) of wasted render time before the export even begins.

Screenshot example attached, showing only a few seconds selected, yet Premiere renders the entire sequence’s audio first.

I do not understand why this is happening:

Are audio previews being invalidated constantly?
Is Premiere requiring audio preview renders now?
Does having a long timeline automatically force this?
Is something misconfigured in my sequence settings?

Things I’ve already tried:

Let it finish once (didn’t prevent the issue next export)
Restarted Premiere
Restarted computer

Nothing stops it from happening again on the next export.

Setup details:

Premiere Pro (current version)
macOS
Long timeline (many hours)
Mostly MP4 camera files + recorded audio

Questions:

Why is Premiere re-rendering audio previews every time?

Is there a way to stop this?

What setting or workflow might prevent Premiere from needing full audio preview generation on each export?

This issue is really slowing down my workflow. Any help would be hugely appreciated. Thanks in advance!

KazuT_G

Inspiring

@JonesVid This is happening on multiple computers. Sequence settings UHD 23.976 FPS. The footage is iPhone HEVC VFR.

@Tom_edit The sample rate for all the clips is 48 kHz. Does a Premiere project/Production have a specific audio sample rate or bit rate?

@Peru Bob I pointed scratch disks / audio previews to my Documents folder (Mac).

P

PaulMurphy

Community Expert

Does this issue also occur in some of your really long multicam sequences, such as the 18+ hour ones you mentioned in another thread? Multicam sequences of that length could be contributing to the problem. Premiere Pro needs to render multicam and nested sequences before it can export. Even if you are only using one frame of a one hour sequence, it still needs to render the audio for the entire sequence.

I would also recommend transcoding your VFR files to constant frame rate.

KazuT_G

Inspiring

We’ve broken the 18+ hour stringout into scenes and are exporting the scenes, and we’re using the source audio instead of the multicam audio, but some of the source clips within the scenes are 2+ hours long, so I suppose Premiere is rendering those. If an audio clip is disabled, does Premiere still have to render it? We’ve given a lot of thought to transcoding the VFR clips but it would result in over 27 TB of media.

KazuT_G

Inspiring

I totally have this question as well, not sure what the answer was? I’m working on a documentary that was shot on iPhones, every time I export, it has to Render Audio Previews.

Questions:
. Is there a way to make Premiere stop re-rendering audio previews every time?
. What setting or workflow might prevent Premiere from needing full audio preview generation on each export?

K

Kevin-Monahan

Community Manager

Hi,

Thanks for the question. What kind of media are you working with? Premiere sometimes continually reconforms or behaves inefficiently with VFR media. Let the community know.

Thanks,

Kevin

KazuT_G

Inspiring

Hi Kevin,

It’s iPhone (models 13 Pro to 17 Pro), VFR.

JonesVid

Community Expert

As a starter have you tried deleting All Media Cache Files. Just in case there is some corruption in the database ??

Then you will of course need to re-render the whole project - then save it.

Can you tell us a bit more about your sequence settings and the Media you are using - Audio and Video characteristics.

Also is the Mac only using one hard drive?. You are not using an external drive by any chance are you?.

Just a few more details will let the Community Users help you out faster

T

Tom_edit

Inspiring

do you have any video/audio files in your project that are a different sample rate to the project?

Peru Bob

Community Expert

where are the audio preview files located?

J

Jeena22389650a1hoAuthor

Known Participant

I just went to the following location to check:

Premiere Pro > Preferences > Media Cache (i'm on Mac)

Both Media Cache Files and Media Cache database are showing:

/Users/User1/Library/Application Support/Adobe/Common/

The "Save .cfa and pek media cache files next to original media files when possible" checbox is UNTICKED, and the attached screenshot shows the rest of the settings.

I have never changed any of this, I believe its all been the default settings since day 1

Thank you for any insights you can provide 🙂

I do not understand why this is happening:

Things I’ve already tried:

Setup details:

Questions:

Why is Premiere re-rendering audio previews every time?

Is there a way to stop this?

What setting or workflow might prevent Premiere from needing full audio preview generation on each export?

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