Hello,
My movie file’s audio is encoded in 6 channel AAC, yet it outputs in plain stereo sound. I have no issues with multichannel playback using AC3 audio encoded video files. My WDTV is connected to my receiver using optical out. This is the mediainfo output for this 6channel AAC audio encoded video in an mp4 container.
General
Complete name : D:\Sample\sample.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 16.1 MiB
Duration : 1mn 27s
Overall bit rate : 1 542 Kbps
Encoded date : UTC 2010-12-26 13:20:35
Tagged date : UTC 2010-12-26 13:20:35
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 7 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 27s
Bit rate mode : Variable
Bit rate : 1 200 Kbps
Maximum bit rate : 6 440 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.054
Stream size : 12.5 MiB (78%)
Title : Sample
Encoded date : UTC 2010-12-25 09:16:48
Tagged date : UTC 2010-12-26 13:20:36
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 1mn 27s
Bit rate mode : Variable
Bit rate : 341 Kbps
Maximum bit rate : 399 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Stream size : 3.53 MiB (22%)
Title : Sample
Language : English
Encoded date : UTC 2010-12-25 09:18:18
Tagged date : UTC 2010-12-26 13:20:36
