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More => Old Versions => Media Center 15 (Development Ended) => Topic started by: cncb on July 12, 2010, 03:31:21 pm

Title: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: cncb on July 12, 2010, 03:31:21 pm

I have some DVD-Audio discs that I converted to multichannel (5.1) FLAC audio files.  MC seems to perform Analyze Audio successfully (although very slowly) but I am wondering what is actually done.  Does it analyze each of the channels separately and average the results, downmix and then analyze, or just extract the left/right channels to analyze?  Also, if I convert/transfer these (as MP3) to a handheld device will it downmix properly or just use the left/right channels as is?  Thanks.

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: JimH on July 12, 2010, 03:35:18 pm

Those would be big files.  Are you loading them over a network?

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: cncb on July 12, 2010, 03:40:48 pm

Yes, they are around 300 MB and I'm using them over a Gigabit network.  They play fine.

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: JimH on July 12, 2010, 03:45:44 pm

You might expect them to take 5 or 6 times longer for MC to drag them across the network, load them into memory and poke around.

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: cncb on July 12, 2010, 04:25:21 pm

Ok, but I'm not worried about the speed.  I am just curious about how the multichannel is handled with regards to analyzing and converting.

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: Matt on July 12, 2010, 04:37:03 pm

Analyzing Audio will down-mix to 2 channels using JRSS.

The handheld conversion will not do any audio format conversion, so would try to make a six channel MP3 file which should fail.

It would be a nice feature addition to optionally support downmixing during encoding (along with other DSPs).

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: cncb on July 12, 2010, 04:42:12 pm

Thanks.  Hopefully downmixing for conversion can be added to the "list" (like volume leveling was recently added).

Title: Re: 5.1 Surround FLAC: analyze audio and convert/transfer to handheld
Post by: DougHamm on July 14, 2010, 02:17:28 pm

Quote from: cncb on July 12, 2010, 04:42:12 pm

Thanks.  Hopefully downmixing for conversion can be added to the "list" (like volume leveling was recently added).

+1 for this!  Would love to see it implemented so I can avoid using Fubar2000 for this one specific purpose.