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Die Hard LD PCM decoded with SDU4 to 5.1

5 Replies, 4911 Views

Just the Die Hard LD PCM track from zoidberg's Blu Ray hardware-decoded with my Dolby SDU4.

The original decoding is to LCRS. 5.1 was derived by splitting S to SL and SR with -3 dB (Matrix multiplication with 0.707) to "create phantom center", thus keeping surround volume equal, and creating an LFE from all the channels' crossover at 200 Hz. Channels were left intact, so the original decoded channels more or less are untouched (aside from the -3dB on the surrounds).

To improve SNR, since it's an analogue process, I raised the original LD PCM track by 6 dB before sending it out into the decoder. 6dB should equal an exact doubling of the raw value, so no rounding errors should be introduced through that. Neither is clipping introduced, as the original peaks were at a felt -9dB.

File is available as 5.1 48kHz 24bit FLAC, around 3 GB. Active members of forum can PM me for mega link. Whoever has it has my permission to share, but might want to talk to zoidberg/PDB as the source was their capture.

Sadly I was unable to mux it back with the stream from zoidberg's Blu Ray. I remember some people mentioning the stream was weird. If anyone has a tip on how to do it, it'd be appreciated. Demuxing with tsMuxerGUI works, muxing with MKVToolnix weirdly glitches out. Remuxing with ffmpeg creates a weird unseekable file.
(This post was last modified: 2017-12-01, 08:21 PM by TomArrow.)
(2017-12-01, 07:45 PM)TomArrow Wrote: [I deleted the content in this post temporarily, need to check back with PDB if this is ok]

It's ok by me have at it.
(2017-12-01, 08:18 PM)PDB Wrote:
(2017-12-01, 07:45 PM)TomArrow Wrote: [I deleted the content in this post temporarily, need to check back with PDB if this is ok]

It's ok by me have at it.

Thanks! Big Grin Sorry for putting you on the spot like that, I wanted to delete the post but didn't know how.
Tom, try muxing to mkv using eac3to including -seekToIFrames
(2017-12-01, 08:43 PM)zoidberg Wrote: Tom, try muxing to mkv using eac3to including -seekToIFrames

Thanks. I haven't yet learned how to use eac3to. But I managed to do it now with MakeMKV ("Open files" mode) and then remuxing the result of that with my stuff. Even kept the chapters. Smile
(This post was last modified: 2017-12-04, 01:53 PM by TomArrow.)
the 4k UHD Blu ray version of Die Hard has the Original Surround track in DTS HD Master Audio!!! i thought Fox was going to drop the track, but apparently they chose not to!!!
(This post was last modified: 2018-07-09, 06:04 AM by dwalkerdon.)

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