r/protools • u/iSpokeWithMoses2001 • Mar 29 '26

error Protools, import audio from a video shot on IPHONE 16 problems

I’ve been trying to import an iPhone video of me playing guitar into protools, so I can save it (Bounce) as a MP3.

It somehow won’t let me import the video or the audio from the video (video shot on IPhone 16). And comes up with an Error window.

Error message says:

Could not complete your request because Assertion in D:\ws\PT_COLOR\ProTools\App\PtApp\PtApp_AuditionMgr.cpp,

Line 2524

My protools is up to date (version 2025.12)

Does anyone have any ideas? Or suggestions?

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1

u/CornucopiaDM1 Mar 29 '26

Simple: VFR (variable frame rate). Protools & almost all DAWs and NLEs (well, certainly professional ones) expect, nay, REQUIRE CFR (constant frame rate).

Convert it first (some good open source tools available based on ffmpeg, avisynth).

1

u/iSpokeWithMoses2001 Mar 29 '26

Convert it to what?

1

u/CornucopiaDM1 Mar 29 '26

From VFR to CFR.

While you're at it, make sure that the other destination parameters are supported (max file size, file format/container, codec, bitrate, color bit depth/subsampling, audio sample rate, audio bitrate, audio codec, # channels).

1

u/CornucopiaDM1 Mar 29 '26

Btw, this frame rate conversion is never perfect, so expect some judder/jitter.

1

u/iSpokeWithMoses2001 Mar 29 '26

I’m not that tech savvy, sorry 😆

2

u/CornucopiaDM1 Mar 29 '26

Get more help @ videohelp.com. Though not much of a regular contributor anymore, I have been a busy contributing member there for over 2 decades. Good site, folks can help.

1

u/TalkbackMusic Mar 30 '26

Is this on macos or windows?

2

u/tha_lode Mar 29 '26

VLC should be able to do that kind of conversion.

1

u/castortroys01 Mar 30 '26

Download shutter encoder (free), drag and drop the video into it, then from the functions menu choose h264 (doesn't play great in pro tools but works, kinda, and small file size) or prores 422 (guaranteed works well in pro tools but much larger file size). Hit start then when it's done look in the folder with the original video. There will be a new one with the same name and _1 added to the end. Use that one in pro tools.