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Premiere Pro 25.6.3 and Canon C70 XF-AVC Audio Issues

Forum|Forum|4 months ago
January 7, 2026
11 replies
228 views

I have an audio issue that is baffling me; perhaps someone else has encountered it and knows what's at play.

I recently shot a multicam project where the A-Cam was my Canon C70, shooting in XF-AVC, YCC422 10-bit 4K. System frequency was 59.94 Hz, audio was set to LPCM, 24-bit, 48kHz, which gives 4-channels of audio, though active audio was only passing to channels 1-2 (ch 3-4 were recording dead air). TC was fed via BNC on the A-Cam (i.e. we were not striping an audio channel with TC). The B-cam was irrelevant, as it's not giving us the problem (but was also XF-AVC, etc., etc.)

At the conclusion of shooting, we checked playback of each camera for audio and video playback; all was good. We also previewed the files using Canon's XF Utility on the laptop; again all is good.

When bringing the files into Premiere Pro and preparing the multicam sequence, there is NO audio showing for any channel of the C70 footage! I have tried the Audio Channels / Interpret Footage; tried transcoding the footage using Media Encoder - using both ProRes and MXF Op1, transferring multiple ways - both direct from the card and using the XF Utility - all with the same results.

I went back to the XF Utility and checked the file, and the playback is perfect. Audio is clear on ch 1-2 and shows in the meters (screenshot attached), but disappears when imported into Premiere.

To solve the issue for today, I was able to import the clip into Tentacle Sync's timecode tool and export an audio-only track with timecode embedded into it, then sync that back with my multicam sequence. This takes substantial time and is not feasible to perform on every project (but will get me out of a jamb today).

Any thoughts on what might have caused this to occur?

System info - Intel Core i7 evo, Win11 Pro, 32GB RAM, NVidia RTX 4050

Premiere Pro 25.6.3 / Build 2

Clip specs attached.

Victor5CD3

Known Participant

These problems are really bad where I work too, we're a team and the system has to be all sharp. When I contacted support they didn't admit it, they said the problem was the codec, in my last contact they recommended updating to 25.6.4 but this problem was not solved, we have an Adobe subscription which we pay annually but seriously when the date expires we are thinking of not renewing the subscription anymore.

I hope to see this and other problems corrected by the Adobe team by mid-February, we will be covering the carnival festivities here in Brazil and it will require a lot of editing.

Build CPU Ryzen 5700X,64 GB ram,Nvidia geforce 5060 Ti 16 Gb,SSD nvme 1tb + ssd sata 2Tb HD Disc 2Tb Win11 24h2

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David.SwinehartAuthor

Participating Frequently

That's my experience, as well. Our challenge is that I'm part of an enterprise team, so we all need to be on the same version. It's a pretty simple bug fix; just keeping Adobe in the loop that it's still an issue.

David Swinehart - Media Producer - Kansas City, MO

Victor5CD3

Known Participant

David well, version 25 works, but there are variations up to version 25.5. Since I updated to version 25.64 to check if the export performance improved, I was forced to use other codecs present in my camera, such as AVCHD .mp4, and version 25.64 only works with these codecs. And the new version 26 also doesn't work, even since version 25, and this new version 26 has slow export performance, which significantly delays our work.

Build CPU Ryzen 5700X,64 GB ram,Nvidia geforce 5060 Ti 16 Gb,SSD nvme 1tb + ssd sata 2Tb HD Disc 2Tb Win11 24h2

D

David.SwinehartAuthor

Participating Frequently

@jamieclarke - This was solved by reverting to 25.5; just a heads-up that it was not fixed in 25.6.4 update last week. I ran an update on one of our PC's and it still cannot handle XF-AVC footage. Still holding on 25.5 until resolved; thanks.

David Swinehart - Media Producer - Kansas City, MO

David_Swinehart

Participating Frequently

Update: I uninstalled 25.6.3 and rolled back to 25.5.0 - solved. Per @Victor5CD3 and @jamieclarke suggestion, this is apparently a bug only in 25.6.x, but not in older versions.

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David.SwinehartAuthor

Participating Frequently

@Victor5CD3 - Good to know. I did ensure that my NVidia studio driver is up to date, but I wasn't aware that this was a 25.6.x issue. It makes sense, as I've had this camera for a bit and never run into this before. Thanks.

David Swinehart - Media Producer - Kansas City, MO

Victor5CD3

Known Participant

Hi David, I also use Canon cameras. The problem isn't related to the firmware, but rather to version 25.6 and its variants. I suggest reverting to 25.5 or version 24.2 of Adobe Premiere. Since your video card is also a 4050, updating the video driver might also help; download the studio version of the Nvidia driver.

Build CPU Ryzen 5700X,64 GB ram,Nvidia geforce 5060 Ti 16 Gb,SSD nvme 1tb + ssd sata 2Tb HD Disc 2Tb Win11 24h2

D

David.SwinehartAuthor

Participating Frequently

Thank you. I'll check to ensure that the camera is up to 1.1.2.1 firmware. We could also try some different codecs - e.g. we shot this one in Long-GOP, and I wonder if Intra-frame would behave differently - but need to stick with XF-AVC since the Canon cine cameras don't offer 24-bit recording in .mp4 (it's limited to 16-bit).

David Swinehart - Media Producer - Kansas City, MO