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AC3 (a52) audio codec works in quicktime,… - Apple Community
https://discussions.apple.com/thread/2788644
Hi, I'm trying to edit a .m4v video (H.264 video codec, AC3 (a52) audio codec) in iMovie '11 on MBP 13. The sound does not work. However, I can hear sound in quicktime player and VLC. But I thought that when qt works, iMovie works. Unfortunately, it doesn't. In my other MBP 17 the same video works fine - I can hear sound in iMovie '11.
QuickTime AC3 Codec - lownlarrahung.mystrikingly.com
https://lownlarrahung.mystrikingly.com/blog/quicktime-ac3-codec
AC3 Audio, H.264, MPEG4, and VBR MP3 Subtitle support for SSA and SRT What's New Version 1.2.3: N.B. Version 1.2.3 is the last version to ... x264 QuickTime Codec.. V_QUICKTIME, Video taken from QuickTime(TM) files, Several codecs as stored ...
AC3 Codec - Free download and software reviews - CNET …
https://download.cnet.com/AC3-Codec/3000-2141_4-48646.html
This is a QuickTime component which allows the playback of AC3 audio in AVI files. The component uses the liba52 library for the AC3 decompressing, you can get more information on …
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.
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).
Quicktime and ac3 audio | MacRumors Forums
https://forums.macrumors.com/threads/quicktime-and-ac3-audio.160600/
FYI, that AC3 codec doesn't work with QuickTime 7.0.2 (possibly 7.0 and up). I wish it did, but until Apple decides to address this issue we are stuck with VLC or trancoding the AC3 to AAC (losing the surround sound).
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 …
Free Download AC3 Filter 2.6b : AC3 Filter is decoding AC3
https://www.free-codecs.com/download/ac3_filter.htm
AC3 Filter 2.6b. The AC3 Filter is a free audio decoder and processor filter which allows media players to read files with AC3, DTS and MPEG audio tracks. AC3 is a must have in every codec pack and it is one of the best in its class, as it can be associated with PCM, LPCM, DVD and SPDIF stream as well by using its System tab section.
Codec Mappings - Matroska
https://www.matroska.org/technical/codec_specs.html
Codec Name: Audio taken from QuickTime(TM) files Description: Several codecs as stored in QuickTime, e.g., QDesign Music v1 or v2. Initialization: The Private Data contains all additional data that is stored in the ‘stsd’ (sample description) atom in the QuickTime file after the mandatory sound descriptor structure (starting with the size ...
QT AC3 Codec download | SourceForge.net
https://sourceforge.net/projects/qtac3codec/
AC3Filter. It is DirectShow AC3 Decoder filter used to palyback AVI files with AC3 sound tracks and DVDs. Multichannel and S/PDIF support. Focused at flexible controls during playback: gains, mixer, stream information, levels and other. VLC media player. The best free media player for video and DVDs.
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