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How to Play 5.1 Dolby Digital Audio in QuickTime Mac OS …
https://www.instructables.com/How-To-Enable-Dolby-Digital-AC3-Passthrough-In-Mac/
AC3 is a kind of file type that is primarily associated with 'AC3 Audio File Format' by Dolby Laboratories. Some apps like VLC, Perian can’t use the AC3 codec due to copyright issue. And it is not strange at all if you get to know that Dolby Digital audio AC3 is a paid audio codec.
AC3 File Extension - What is it? How to open an AC3 file?
https://filext.com/file-extension/AC3
What is an AC3 file? AC3 files mostly belong to QuickTime by Apple. An AC3 file contains digital audio saved in Dolby Digital file format using its AC-3 (Audio Codec 3, Advanced Codec 3, and/or Acoustic Coder 3) audio compression standard. AC-3 codec uses modified discrete cosine transform algorithm (MDCT), so AC3 files are lossy-compressed.
AC-3 Compressed Audio (Dolby Digital), Revision A
https://www.loc.gov/preservation/digital/formats/fdd/fdd000209.shtml
General: QT AC3 Codec provides information about a software component that permits AC-3 playback in QuickTime players.: History: See Dolby History (link available through Internet Archive).The following notes were taken from the 2010 specification cited below: "A/52 approved 10 November 1994; Annex A approved 12 April 1995, Annex B and Annex C approved …
Dicas Que Podem Resolver Dolby AC3 Codec 8192 Download ...
https://runtimealley.com/pt/dicas-que-podem-resolver-dolby-ac3-codec-8192-download-para-mac/
Isso, e o fato previsível de que a versão mais recente do Quicktime suporta totalmente Dolby Digital, fornece qualquer codec QT-AC3 um pouco inadequado. No entanto, se você estiver usando essa versão mais antiga do Quicktime, você e sua família podem achar útil fazer isso.
AC3 (Dolby Digital) codec under Windows 7 - Microsoft ...
https://answers.microsoft.com/en-us/windows/forum/all/ac3-dolby-digital-codec-under-windows-7/8c361f51-8990-4112-a8cf-deef2ee1ce7e
It uses Quicktime to play back the video files and I think this is where my problem lies. Under XP I use *.m2v files (mpeg2) and their audio in a separate file *.ac3 (Doldy digital) and play back is 100% with audio. Under Windows 7 I do the same thing but Quicktime does not play back the ac3 audio (video is perfect).
The Correct Way to Enable AC3 Passthrough with Quicktime
https://www.cod3r.com/2008/02/the-correct-way-to-enable-ac3-passthrough-with-quicktime/
Due to bugs in Apple’s Quicktime components, (rdar:5799879 reported in March of 2008, not fixed), some methods of reading AC3 will have the wrong channel layout. Furthermore, due to issues related to how multi-channel audio is handled, the decoder is unaware of the order QuickTime expects (rdar:6921431).
Why can't I play AC3 audio? - Apple Community
https://discussions.apple.com/thread/251316599
I did a clean install of 10.14.6 onto the HD and an upgrade-in-place on the SSD. The Quicktime problem is isolated to the system on the SSD. Quicktime plays AC3 content just fine when booted from the HD. I attempted to use the QT app on the HD while booted from the SSD but that did not fix anything.
Audio AC3 Codec - Apple Community
https://discussions.apple.com/thread/4419601
Audio AC3 Codec. I am running QT 10.2 on OSX Mountain Lion 10.8.2. I installed an A52/AC3 Codec that is suppopsed to play AC3 Audio in QT. The instruction said to put 1 component in Library/Component and the other in Library/Quicktime. In the System folder there is also a Library/component and Library/Quicktime folders.
QuickTime Player 7 Pro: Merge Files | Larry Jordan
https://larryjordan.com/articles/quicktime-player-7-pro-merge-files/
The compressed QuickTime video file (H.264 format) The compressed surround audio file (AC3 format) Open both files in QuickTime Player 7 Pro. NOTE: Even if QuickTime 7 is installed, the AC3 file won’t see it. To open the AC3 file in QT 7, right-click the file and select Other. Navigate to where QuickTime Player 7 is installed and select it.
Quicktime 5.1 to 5.1 ac3? - VideoHelp Forum
https://forum.videohelp.com/threads/244609-Quicktime-5-1-to-5-1-ac3
I have QTpro and I was wondering if there was a way to take the 5.1 audio from a quicktime file and create a 5.1 ac3 file for use in DVDlab. I've been using AC3Machine to encode exported waves fro the QT files, but it encodes it for DD 2.0.
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