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10th January 2011, 17:40 | #1 | Link |
Scared of Iguanas
Join Date: Aug 2006
Posts: 32
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Tearing my hair out: how do I add DRC to DTS tracks?
Hi all,
I love my Blurays, but I'm tired of having to sit through every DTS-only movie with one finger on the volume button (dialogue too low, effects WAY too high). With that in mind, I'm trying to add some dynamic range compression to the DTS tracks. My amp is incapable of adding DRC to DTS sources on the fly, so I'm going for the PC re-encode route. At first, I thought I'd just load the DTS file (core, extracted using eac3to) into an AviSynth script using NicDTSSource("x.dts",drc=1) - but that seems to make no difference whatsoever. It seems that the centre channel is about 2-3x lower in volume that the front left/right. Does anyone know how to add DRC to a DTS track? I would ideally be converting the DRC'ed file to AC3, if that makes a difference. Any help would be MUCH appreciated! Last edited by buffyangel108; 10th January 2011 at 17:52. |
10th January 2011, 23:46 | #3 | Link | |
Scared of Iguanas
Join Date: Aug 2006
Posts: 32
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Quote:
That is exactly what I am trying to do. Can you please point me in the right direction as to how I might do so? All of my attempts so far just produce an AC3 track with the same unbearable dynamic range (too quiet dialogue and too loud effects) as the original DTS track. |
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11th January 2011, 02:18 | #6 | Link |
Moderator
Join Date: Feb 2005
Location: Spain
Posts: 6,915
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Yes, the DRC added is not like other certified encoders.
http://forum.doom9.org/showthread.ph...111#post893111
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11th January 2011, 03:23 | #7 | Link | |
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Quote:
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11th January 2011, 10:50 | #8 | Link |
Moderator
Join Date: Feb 2005
Location: Spain
Posts: 6,915
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This is the last I know:
Code:
Aften TODO list --------------- - Channel coupling (this will be a large undertaking) - E/AC-3 bitstream format and encoding (need a good decoder & samples first) - ABR encoding mode - 2-pass encoding - Frame parser / analyzer - Option to downmix/upmix/resample prior to encoding - 2-channel surround-matrix downmix - 2-channel headphone downmix - Stereo to 5.1 upmix - Improve DRC implementation - Psychoacoustic model & delta bit allocation - Gapless info using auxdata field - Streaming interface to libaften / internal sample buffer - Better error logging for libaften - pkg-config support or alike - Channel layout support in PCM decoder http://forum.doom9.org/showthread.ph...48#post1232448 BTW, I think the Dolby DRC method is obsolete with the new receivers 'Night mode'. I recommend encode always without DRC and DialNorm.
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11th January 2011, 19:02 | #10 | Link |
Derek Prestegard IRL
Join Date: Nov 2003
Location: Los Angeles
Posts: 5,989
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On this note, I've been curious about the necessity of a "certified" encoder for IPTV/VOD. In these spaces, Dolby Digital is common, and is frequently decoded in a set-top box, which may not have a "night mode". Therefore, as I understand it, having properly set Dolby metadata (DRC, dialnorm etc) is important.
Not to say that such metadata is usually set properly!!! It's often set to some arbitrary default. Derek
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