Thank you John for checking into this,

General
Complete name                            : XXXXXXXXX\Users\XXXXXXXXXX\Videos\Radeon ReLive\Starfield\Starfield_2024.01.13-16.24.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 3.00 GiB
Duration                                 : 14 min 13 s
Overall bit rate                         : 30.2 Mb/s
Frame rate                               : 59.940 FPS
Writing application                      : Lavf59.27.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L5.2
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 14 min 13 s
Source duration                          : 14 min 13 s
Bit rate                                 : 30.0 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 59.940 (59940/1000) FPS
Minimum frame rate                       : 20.000 FPS
Maximum frame rate                       : 61.687 FPS
Original frame rate                      : 60.000 FPS
Standard                                 : Component
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.060
Stream size                              : 2.98 GiB (99%)
Source stream size                       : 2.98 GiB (99%)
Color range                              : Limited
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 14 min 13 s
Source duration                          : 14 min 13 s
Bit rate mode                            : Constant
Nominal bit rate                         : 192 kb/s
Maximum bit rate                         : 192 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C Cb Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Source stream size                       : 19.6 MiB (1%)
Default                                  : Yes
Alternate group                          : 1

@Robert-Hensley4432

Fatherly Advice follows:

Stop recording Variable Frame Rate* if you plan to edit in Vegas Pro.

Frame rate mode                          : Variable
Frame rate                               : 59.940 (59940/1000) FPS
Minimum frame rate                       : 20.000 FPS
Maximum frame rate                       : 61.687 FPS
Original frame rate                      : 60.000 FPS

* I Don't know or care how other editors handle VFR.

I use OBS for screen captures with Apple Pro Res and multiple channels of PCM Audio and it cuts fine in Vegas Pro 21.

To prepare the files you have for editing, I would start with Shutter Encoder with the following settings:

If you could place a short sample of your media on a cloud share (One Drive, Google Drive, etc.) and post the link,

someone can give you a more definitive answer.

Full Disclosure

All of my advice is covered by a "double your money back" lifetime warranty.

@Robert-Hensley4432 I'm confused. Your thread title says "Mp4 with Dolby 5.1 fails to import sound properly" but your media info shows the audio as "Format : AAC LC, Format/Info   : Advanced Audio Codec Low Complexity" which is AAC not Dolby AC3. Have you posted info on the wrong file?

John thank you for the feedback and advice, my Father passed away 15 years ago, he was a tough old Korean War US Army Ranger ( 187th Rakkasan ) and a good father, I really miss him and his advice. I retired last year and am 67 years old. My sound system in windows is set to 5.1 Dolby and the reading I had done looking for a solution had me assuming. Just the same I can without issue import these videos into Clipchamp, cut them and generate a working satisfactory mp4, just cannot export it as 4K without paying Microsoft a monthly sub. The variable frame rate maybe is a setting from AMD capture software, never encountered any issue in Clipchamp so your advice I will go educate myself a bit more regarding my default capture format and capture device flexibility, see whats what. I do appreciate your feedback and attempt to assist me.

EricNX, Yes, my mistake assuming since I was setup in control panel as 5.1 and some other information regarding my issue had me giving wrong file info. Wasn't familiar with the software John linked that allowed me to extract the video data. Worked with premier Pro over 5 years and stopped editing a couple years back so I have some catching up to do with file formats. Which is why I am reluctant to consider Vegas. Clipchamp just works and Premier Pro just works, Vegas I have had to scan forums for answers and ask for help here. I do really appreciate the feedback though and Vegas offering of a perpetual sub is a big lure. I think I am going to back off for now though and keep looking ... and get caught up on formats, as much as I need to for editing and posting to youtube.

@Robert-Hensley4432 Thanks Robert. So your problem is with mp4 with AAC 6 channel audio. I've altered the thread title to reflect that. It helps when maybe later someone is searching with a similar problem.

@Robert-Hensley4432

It would be better to go back to square one and re-examine your source, your capture method, and your intended use:

1. What is your original source? Is it movie film? Is it video tape? Is it a Frankenfile that has been captured and converted for you previously?
2. What is your "capture method?" Details.
3. What is your intended use? Is it for your viewing at home? Is it for sharing? How? Do you intend to make a DVD or file copy to share? Will you be sharing online, via Youtube or social media? Be specific.
4. Because "Clipchamp" will encode a certain audio and video format into a file is no guarantee that file will retain any integrity with regards to the source, with the common accepted input format standards, with conventional output formats, or with Vegas itself.

So. describe in detail your media source, capture path, and your intended use, and our experienced users can guide you through the steps and procedures necessary to get your historical archive into a capture format that is appropriate.

Of one thing I am pretty certain, your source is probably not appropriate for unmediated capture at 4K 60 fps, nor will the audio ever be transfigured to 5.1 Dolby Surround. Putting it in a big box with a pretty wrapper doesn't change what's inside.

So, let's start by getting you the best capture for your source, then if native quality and your intended use merits it, we can explore some modest AI / Smart Enhancements for judicious, sensible grooming.

No, mark-y, it really isn't that complicated. I have video edited for years, a few years ago. All that's required for other software I have used is to capture and drag the result into the editor, if you're using Premier Pro or Clipchamp. I don't need to do anything but drag the video in, edit, export and move on to the next one. That's why I was unaware the format difference, what I had assumed, was due to I didn't need to know that info for other software. I was able to drag the source in, the software knew what it was and how to decode it, I made edits easily and without complications or confusion and clicked export and it generated a perfectly working file without any further requirements. Premier Pro was costing me $50/mo and I paid that for years. Clipchamp was already installed in my copy of windows and works without me having to know anything really, it just will not allow me to export to 4K without give sub money to Microsoft.

Look, I respect you all work in the industry and likely have a lot of knowledge regarding video formats and editing. I haven't had to go and learn anything more than drag, drop, cut, export with the other software. I have lots of videos on youtube that the level of effort was in learning the features like shadowbox and trim, and fade and PIP and such, not how to make it recognize the format. To have it load the format all I needed to do was look at the file extension and the other software deals with the complication just fine as far as I could tell. I'm sure I can learn the nuances of Vegas and appreciate the attempt to explain the software needs to me. I am moving on though, likely will just go back to Premier. I know that software and menu and it never gave me any complications.

I do want to apologize to everybody though for wasting your time and likely coming off as stupid and hardheaded. I have done support work too and people like me are a pain, sorry for that.

Be well and take care, see ya.

Yes, your comfort level is certainly a big consideration, especially if you already have methods that work for your needs. Best of luck.