![]() I don't have an Apple TV yet but I do have an iPad which has the same video requirements. The Apple TV, however is more restrictive. Unless I need to burn subtitles, I've never had to re-encode the video track for playback on PS3. So when the PS3 is fooled into playing a High 5.1 video that has been relabeled to High 4.1, then there usually is not issue. There is not much difference between these two profiles that would show up in common encodes. So when the target device tries to play the video, it's fooled into thinking that the profile level is appropriate.Ī PS3 is happy with High 4.1. When it passes through video, it looks at the target device, and then edits the movie at the hex level to adjust the avc profile "label" to an appropriate value. I'm not sure about Subler, but here is what is going on with MKVtools. (a) Once encoded, you can't change the properties that make a video High 5.1 without re-encoding, (b) a High 5.1 video doesn't have to be encoded using the fancier settings, and (c) all it would take is for one of the "fancier settings" of a higher profile to be an problem, for a manufacturer to have to specify a lower profile is needed for video playback. A High 5.1 video can be encoded using more fancy settings than a Main 3.1 video, because the Main 3.1 profile is more restrictive. Just to make sure we're all on the same page, a good way to think of a video's avc profile is as a specification for what properties are allowed for that movie. If all hope is lost, are there optimal settings for Handbrake that speed up the re-encode process?.Is there a simple setting in MKVtools that I'm unaware of that solves the problem?.Is it an issue with the audio track (I believe MKVtools re-encodes the audio from AC3 to AAC, but can't confirm)?.Is there a way to update the H.264 profile without re-encoding?.Is it the H.264 profile that's causing the problem?.The Handbrake file played flawlessly.Īt this point, there are a few questions: As expected, the MKVtools file appeared on the Apple TV, but displayed the error message when I tried to play it. It took 5 minutes for the MKVtools file and 1.5 hours for Handbrake (MacBook Pro, 2.4 GHz Core 2 Duo, 4GB RAM). ![]() I created two M4V files, one with MKVtools and one with Handbrake. I did a final test last night with a 1.5GB MKV file (a 30 min show). If someone is well-versed in the codec/profile world, please share! It doesn't seem like there's any way to change the profile without doing a full re-encode (a la Handbrake). The codec is compatible, as we know, but most MKV video tracks use a profile that is not playable on Apple TV. I haven't researched extensively, so please forgive any ignorance, but I think the problem lies in the H.264 profile. I have had the exact same issue with both Subler as well as MKVtools.
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