AKarpo
26th February 2008, 06:38
Many people over at Macrumors.com http://forums.macrumors.com/showthread.php?p=5038247#post5038247 have been searching for a solution in order to get .mkv's with AC3 into an Apple TV compliant .mp4 container with 5.1 aac, along with Level 3.1 compliance.
Basically, after many hours of Googling and forum searching, this is the correct process as I understand it currently.
1) Demux .mkv into h.264 and .ac3 streams
2) In order to turn .ac3 into .aac, I was using Nero, however Nero spits out .mp4 instead of the raw .aac that I need. I tried using the Besweet guide here at Doom9 but I can't find the correct .dll's online (that work) anywhere after about a half hour of Googling.
3) Missing step that hasn't been covered yet: turning Level 5.1/4.1 video found in the .mkv into Level 3.1 that is compatible with an Apple TV. Do we do this before or after the demux in step 1? (I haven't figured this out yet) Maintaining full resolution of 1280x720 @ 23.967fps with a constant bitrate of around 5000-6000 would be nice too.
4) Remuxing everything back together with Yamb
If anyone could code something for this (Handbrake isn't quite there yet, Visualhub isn't getting the .ac3->.aac yet either) I feel that it would be a somewhat promising venture, financially. I think there are quite a few people out there sitting on these .mkv's, looking for a good solution to stream them to their AppleTV's that doesn't involve a full blown re-encode. (Yes I know about Popcornhour, their assembly and distribution channels are still way too in their infancy)
Basically, after many hours of Googling and forum searching, this is the correct process as I understand it currently.
1) Demux .mkv into h.264 and .ac3 streams
2) In order to turn .ac3 into .aac, I was using Nero, however Nero spits out .mp4 instead of the raw .aac that I need. I tried using the Besweet guide here at Doom9 but I can't find the correct .dll's online (that work) anywhere after about a half hour of Googling.
3) Missing step that hasn't been covered yet: turning Level 5.1/4.1 video found in the .mkv into Level 3.1 that is compatible with an Apple TV. Do we do this before or after the demux in step 1? (I haven't figured this out yet) Maintaining full resolution of 1280x720 @ 23.967fps with a constant bitrate of around 5000-6000 would be nice too.
4) Remuxing everything back together with Yamb
If anyone could code something for this (Handbrake isn't quite there yet, Visualhub isn't getting the .ac3->.aac yet either) I feel that it would be a somewhat promising venture, financially. I think there are quite a few people out there sitting on these .mkv's, looking for a good solution to stream them to their AppleTV's that doesn't involve a full blown re-encode. (Yes I know about Popcornhour, their assembly and distribution channels are still way too in their infancy)