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Doctor M

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Join date
1-Feb-2005
Last activity
4-Dec-2025
Posts
2,550

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Post
#371013
Topic
Need some advice on mixing 2 audio tracks together...
Time

Hmm.  That IS a good point.  It does seem stronger, but I'll have to compare a DPL decoding of the 2.0 versus the 5.0.   Mind you that's also assuming it's 2.0 stereo and not 2 channel mono (something else I forgot to check).

Anyway, that's a good idea about extracting the center from a DPL matrix.  (If I can figure out how to do that again.)

Post
#370967
Topic
Need some advice on mixing 2 audio tracks together...
Time

I've got a line on an older film that I've been looking for for a while: "High Road To China" (http://www.imdb.com/title/tt0085678/) starring Tom Selleck.

Unfortunately the primary audio track is Russian (?) 5.0.  The English track is only 2.0.

As far as I can tell the non-English track is only an overdub in the center channel leaving the L/R/SR/SL clean and untouched (including English dialog that can be heard ambiently).

Am I crazy to think that I can take the 2.0 track, mix the channels together 50/50 and use it as a replacement center channel to create a new 5.0 mix in English?

For the life of me I can't figure why it wouldn't work.  Using something like Sony's SoundForge to mix the L/R of the 2.0 mix, decode and extract the 4 useful channels to wave and then re-encode the whole thing back to DD.

Thoughts?  Interest?  Advice?

Post
#369110
Topic
Help Wanted: Need capper capable of recording from Encore for 'Safari 3000'
Time

I'm told that there will be no HD version of this.

Unless somone capable of raw caps wants to take this on, I'll use my DVR-DVDr combo unit to record at very high bitrate and then deinterlace/recode.

So sad.  Why can't they just release everything on DVD and let us decide what we want instead of 10 Underworld releases, and 30 Fifth Element versions.  Sure they're good movies, but they're not THAT good.

Edit: For anyone curious about this, I found the trailer online: http://www.videodetective.com/TitleDetails.aspx?publishedid=00002071

Post
#369026
Topic
Help Wanted: Need capper capable of recording from Encore for 'Safari 3000'
Time

Encore, Encore Plex and Encore On Demand(!) all have Safari 3000 this month.

I don’t know if HD is an option or what.

Anyway this is a movie I very much love, and is not in print anywhere.  Is anyone capable of doing a capture of some sort for me?  Willing to trade goods or services…

Post
#368899
Topic
Idea: Red Dwarf - Back To Earth
Time

I haven't seen all the extras yet.  The first is the same as the one that aired with the show, there is a new second one and then some Smeg Ups (or is it Outs), and deleted content.  The whole second disc is extras.

The Lister sneeze-ironing is only trimmed in that before he starts talking about tomatoes he tosses it in the air only once (instead of twice), and one line of Rimmer's rant afterwards about him planning it is trimmed.

The cuts are subtle and seem pointless.  When Cat goes on about being caught by the giant testicle he original complaint about his clothes and hair being ruined.  In the new cut only his clothes.

I could understand cutting some of the mugging of the camera or really useless jokes, but that's not really how it came out (in my opinion).

Since most people seem to agree it was needed, I don't know why they didn't dub in a laugh track.  Mind you I don't usually like having them tell me when to laugh, it's just that the show feels really sterile and quiet (the CG making that worse).

Post
#368836
Topic
Idea: Red Dwarf - Back To Earth
Time

So the DVD release of the new Red Dwarf series has turned out to be almost as much of a disappointment as the show itself.

It contains 2 different cuts: the TV version and a “Director’s Cut”.

The DC has the advantage of DD5.1 (the TV cut is DD2.0 only), a longer ending credit crawl and a new tacked on “The End” being typed on a typewriter.

Unfortunately, for some reason they thought that cutting some gags here and there and general tightening of scenes would improve things.

I probably liked this more than most (based on comments I’ve read), and to be fair they would have needed to cut half the show if they wanted to remove gags that didn’t work.

So basically your choices are watching an abridged edition in DD5.1, or watch a longer version with all the opening and closing credits and 2.0 sound.

I don’t think a fan edit removing additional content would solve the biggest problems (no Rob Grant, no laugh track, no Holly the computer and in your face CG work).  Still I wouldn’t mind seeing an ubercut as a single film.

I guess I’m just curious if anyone is taking this on or not.  It’d be pretty hard to sync the 5.1 track to the TV cut (lots of small one or two second trims here and there).  I just would like to see a single movie-like cut that has ALL the content… maybe even adding a deleted scene from the second disc.

Just a thought.

Post
#367652
Topic
Doctor M's ÜberGuide for -Full- PAL to NTSC DVD Conversion v2.0
Time

Interestingly I discovered another type of PAL video today.

A DVD extra I was converting was originally 24p, but converted to 25i by adding 1 duplicate frame per second and then interlacing.

I won't be adding it to the guide since it was a bit of a mess and I don't know how often they actually pop up like this.

My script was:

telecide(guide=2).fdecimate(rate=23.976)

It's not perfect, there were some interlace artifacts left behind, but I can't think of a better way to do it.

 

Post
#367172
Topic
adding LFE to GOUT (Released)
Time

Here's what I've thought about and learned since the last post.

I don't remember what source you're using, but I would THINK DD2.0 tracks or similar lack lower end frequencies (because they intend you to use a .1 channel for anything really low.)

I can't prove what the cut off is because I don't have access to an official DD 2.0 soundtrack of SW.

My RtW preservation uses PCM from a laserdisc rip.  Here is a frequency analysis of ANH:

As you can see there is definitely low frequency there.

Here's a close up below 200Hz:

Now here's the deal, boosting the lower end is still not a good idea.  In fact the LFE is suppose to be mixed 10db lower in volume.  (Home theaters are calibrated to play the LFE track back 10db louder to compensate.)

Modern stereos have Pro Logic II or better.  If the frequencies are there, it will use them.  DPL2 upmixes properly to 5.1.  The work is done for you.

That's also the problem.  Not everyone has DPL2 in their equipment.  Older Pro Logic means 4.0 surround upmixes.

So what do you do if you don't want to use the space on a DVD for PCM or assume that everyone has DPLII or better?  Transcode it yourself.

http://forum.doom9.org/showthread.php?t=83384 is a great guide (though a bit out of date since ffdshow can now output directly to an ac3 file).

I was going to provide a sample of how this works, but I've got PowerDVD problems (which is the what I was using in the chain to encode the DPLII).

Post
#367112
Topic
adding LFE to GOUT (Released)
Time

I'm confused.  From what I've read, all you seem to be doing is boosting the lower frequencies of the current mix by however many decibels (3 I think).

That's not a LFE track.  LFE is low frequency effects, not just the low frequencies louder.  Many people already have their home theaters configured so that frequencies below a certain number of Hz gets routed to their subwoofer. 

This is because a lot of the F/R/RS/LS/C speakers in home theater setups don't have good articulation of the low frequencies and the subwoofer is asked to do the job of a normal woofer.  (That is, LFE does not equal Subwoofer).  Don't get me wrong, there's nothing wrong with this since bass is largely non-directional.

True LFE are frequencies usually below 40-50Hz (though they can start as high as 80-120Hz for smoother transition from the other speakers frequencies).  The audio tracks you are working with should not contain frequencies this low because home equipment is not expected to be able to articulate it.  (I haven't checked, the laserdisc PCM data MAY contain frequencies this low, but I wouldn't count on it.)

Your current method is only overdriving the current normal low frequencies.  You can do this at home by going into your tuner and increasing the volume of your subwoofer relative to the rest of your speakers.  (Some subwoofers even have a separate volume knob right on them.)

In fact, your current method runs the risk of causing clipping (volumes so louder the peaks are flattened and crappy sounding).

The best way to do make an LFE track would probably be to strip the LFE track from the official 5.1 mix and sync it to the mix you'd like to use.

Another idea, while it's more theoretical at this point, would be to find frequencies below 80-100hz, and copy them to a new track then pitch-shift them down about 25Hz. 

I don't know how it would sound, but it's an interesting idea.

Otherwise, I'd strongly recommend against your method.

Post
#367103
Topic
GOUT image stabilization - Released
Time

Ok, this is more a minirant than a comment.

fft3dfilter is awesome.  I probably couldn't live without it.  Still comparisons of before and after show it really does its thing for removing noise.

What I don't understand about it is that in motion it makes it look like the camera lens is dirty.  Besides softening the picture, you get a soft pattern that looks a bit like film grain but doesn't change pattern from frame to frame.

I'm not sure I can explain it better.  It's a strange artifact, but I've seen it time and time again.  Does anyone know what I'm talking about?

Post
#367091
Topic
GOUT image stabilization - Released
Time

Since you aren't making any changes in play speed, subs are a piece of piss.

Rip them from the original DVD using PGCDemux.  It'll give you all the files in .SUP format.

Do the intermediate muxing of your new video, audio and subtitle files in MuxMan (not many authoring programs can handle .SUP format).

Then of course use VobBlanker to drop your new muxed content back onto the original disc.

--

For x264 files try AutoMKV or MeGUI.

--

Those screenshots are not of the same frame, so comparison is a bit difficult, but, I don't see anything that looks like the work of a deband filter.  Have you checked the cantina scene?  The screenshot you had before of Han's hand has banding.

 

 

 

Post
#366870
Topic
GOUT image stabilization - Released
Time

I dunno.  I've always remembered the colors as being particularly vibrant in theaters (originally).

When I made my preservation set, I tweaked the saturation based on some of the 'final' screenshots posted by the X0 project (since they had access to better materials for color matching).  The colors used by X0 were fairly bright.

Edit: Btw, played around with DeBand filters the other day (on a different project).  GradFun2DBMod yielded nice results when previewed, but caused an error with CCE.  GradFunkMirror's results looked almost exactly the same, but without CCE problems.

I'd really recommend you all give it a try.  It does some nice things for making banded video look less cartoony.

That's assuming the banding issue still exists.

Now if we could just figure a way to kill the temporal smoothing.