When I load a blu-ray in handbrake, and select "High Profile", it gives me two audio tracks.
The first is "AAC (avcodec)" with "Dolby Pro Logic II" - From what I understand this a stereo stream, yet is an "intelligent" one, and some playback devices can kind of transform it into some form of half-decent surround sound. I also understand that this one is included for compatibility with iPhones and the like.
The second is always "AC3 Passthru", even though the source is usually "DTS 5.1" or "DTS-HD MA 5.1". How does this work - I swear it can't passthrough one from one codec to another?
My second question is what is the best combination of audio output codecs so that the surround sound is preserved while also having general compatibility.
I'm not too worried about passthrough or anything lossless, so would there be anything wrong or stupid with the following:
1) DTS-HD ---> AAC (avcodec), Dolby Pro Logic II, 160bitrate, Auto Samplerate
2) DTS-HD ---> AAC (avcodec), 5.1 Channels, 320bitrate, Auto Samplerate
or:
1) DTS-HD ---> AAC (avcodec), Dolby Pro Logic II, 160bitrate, Auto Samplerate
2) DTS-HD ---> Auto-Passthru
If I take the first suggestion - is this a waste/pointless. Is there anything the second track wouldn't play on?
Also for the first suggestion, how would the media player (e.g. sony blu-ray player playing MP4 off USB stick) choose the better audio track? I've never seen an option to choose.
And for the second suggestion, can DTS-HD just be passed-through to an MP4?
Thank you!!!!
Note: I'm converting using the "av_mp4" container that's appeared in the recent nightlies, but from what I understand this is just a better version of the normal "Mp4" one.
The first is "AAC (avcodec)" with "Dolby Pro Logic II" - From what I understand this a stereo stream, yet is an "intelligent" one, and some playback devices can kind of transform it into some form of half-decent surround sound. I also understand that this one is included for compatibility with iPhones and the like.
The second is always "AC3 Passthru", even though the source is usually "DTS 5.1" or "DTS-HD MA 5.1". How does this work - I swear it can't passthrough one from one codec to another?
My second question is what is the best combination of audio output codecs so that the surround sound is preserved while also having general compatibility.
I'm not too worried about passthrough or anything lossless, so would there be anything wrong or stupid with the following:
1) DTS-HD ---> AAC (avcodec), Dolby Pro Logic II, 160bitrate, Auto Samplerate
2) DTS-HD ---> AAC (avcodec), 5.1 Channels, 320bitrate, Auto Samplerate
or:
1) DTS-HD ---> AAC (avcodec), Dolby Pro Logic II, 160bitrate, Auto Samplerate
2) DTS-HD ---> Auto-Passthru
If I take the first suggestion - is this a waste/pointless. Is there anything the second track wouldn't play on?
Also for the first suggestion, how would the media player (e.g. sony blu-ray player playing MP4 off USB stick) choose the better audio track? I've never seen an option to choose.
And for the second suggestion, can DTS-HD just be passed-through to an MP4?
Thank you!!!!
Note: I'm converting using the "av_mp4" container that's appeared in the recent nightlies, but from what I understand this is just a better version of the normal "Mp4" one.