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Discussion in 'Apple TV and Home Theater' started by marcel-v, Dec 27, 2010.
Sorry, I'm a noob to this stuff.
AC3 is just the codec name for Dolby Digital 5.1
They SHOULD work on ATV2
For the Apple TV, audio track 1 must be AAC and audio track 2 must be AC3.
I assume you are talking about options in the latest handbrake nightly builds...
"AC3 Passthru" will take an existing AC3 soundtrack and include an exact copy as a track in the final encode.
"AC3" will take a non-AC3 source (ex. DTS for a DVD or Bluray) and convert it to AC3. This is useful for devices that do not support other formats (ex. AppleTV).
Both options will create audio tracks that are compatible with the AppleTV. There is likely something else about your encode causing your problem.
I am not sure how you mean that but i have 300 m4vs i encoded with handbrake with the 1st audio track selected being the AC3 track and the second audio track being the AAC track. Works fine in ATV2 as well as on iPad or iPhone
But are you getting 5.1 surround sound that way? It's supposed to be the other way around.
The ATV software looks for AC3 in track 2. If it's there, then it enables AC3 passthrough via the optical port. By default, track 1 is enabled and is AAC, AC3 is disabled and is track 2.
On every file. I did not know that "it was supposed to be the other way around". What does that mean? Your saying the ATV2 cant play a AC3 track that is listed as track 2?
I have converted MKVs, Blu Rays (which go to MKV then to handbrake), DVDs and AVIs. My preset it the 5.1 track first followed by the AAC track. Whether its passthru or DTS conversion, I have never had a problem with one file.
The reason the Apple TV preset in Handbrake sets track 1 to AAC and track 2 to AC3 is because that's how the files from Apple are. Handbrake just replicate's Apple's videos for the Apple TV.
Those requirements on that support page are "should" and not "must" nor "shall."
Putting them in a different order doesn't violate the spec, and "should" work, but YMMV.
So if you set the dolby digital to audio, i believe if the AC3 track is track 1, it will not pick it up and instead play stereo. However, i am not sure why you would never set it to on instead of auto, which is how i have it, and this it works regardless of how it is encoded - track 1 or track 2. That said, no reason for me to not switch it from this point on in case something changes.