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ADigitalMan's Guide to MPEG2/AC3 Editing — Page 9

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ADM,

I have a tech question for you.
Got a hold of a bootleg concert that was filmed handheld and that is shaky as hell.
I was wondering if you knew how to stabilize the shots in an editing software.

I realize that it would most likely mean stabilize the frames section by section with the most corresponding reference pixels.

Any thoughts or experience ?
Do you expect me to talk ?
No Mister Bond I expect you to DIE !
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I have just finished editing a project in womble, and exported it successfully. My only problem at this point is with the transitions.

I had made my first cut, exported it and then dumped that back in to clip a couple of extra frames, and to tweak a couple of tiny spots. I authored the the DVD in DVDlab Pro2 and then shrunk it down to a DVD5 and burned it with Nero Recode.

When I watch it on my Optoma (HD70) projector, some of the scene changes are really obvious, due to a large amount of horizontal lines showing up for a split second during the scene change. Some are worse than others, and some of them are fine. It all looks fine in Womble, and when I play the demuxed Mpeg in Nero Showtime, but that could be due the fact that it's on a tiny little 19" screen, and not on my projector.

Any ideas?

FE<3OT

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Sounds like the source (or at least some of it) was interlaced or telecined. Probably the latter. You'll need to IVTC the video source (dgindex->Gordian Knot AVISynth Script->TMPGEnc to a new M2V/MPV file, change the name of the original stream to .bak and then the new stream to the name of the old stream, and then re-open Womble and re-export the streams.

It sounds more involved than it is. The only command you'll need in your AVISynth script is the telecide command. Go with what Gordian Knot selects by default. Make sure any crop and resize lines are commented out.

I just had to do this with all the deleted scenes from Blade Runner. I was very surprised to see them telecined but they were. At least they were 16X9.
I am fluent in over six million forms of procrastination.
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Wow, I would have never guessed that Transformers (2007) would have been interlaced or telecined. I guess I'll try to stumble through what you just suggested. I'll probably have to beg your help once again before it's all said and done.

FE<3OT

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Could you maybe list those directions in way that a person, who is not real familiar with those programs, could understand them? I assume that I'll be doing this to the demuxed files that i loaded into womble, and that i'll have to go back to the first womble save, and not my fixed, second exported file?

FE<3OT

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Couple quick questions. First is there a difference between the Womble export file options (.mpg and .mpv) ? I had been exporting them as .mpv then later I noticed it somehow got changed to .mpg. I'm still getting a complete stream copy which is what I want but I just want to be sure which file type I should be saving as (if it matters).

Secondly when I import my movie file into DVDlab Pro it gives me a messages saying the file still has "open GOP's". Am I doing something wrong when exporting from Womble to get this message with the file in DVD lab Pro?


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If you separate the audio and video streams separately, then there should be no difference between the .mpg, .m2v, and .mpv extensions. You can change the extension with no ill effect in my experience.

Ignore the Open GOP warning. I get that all the time.

Reave, when I've analyzed these interlaced files in DGIndex, I've noticed that they're called "NTSC" and the non-interlaced ones are called "film". Perhaps it's simply a flag that, if ignored, will make the file usable. I've been re-encoding just because mixing the two types leaves those very issues you're talking about.

What directions in specific do you need? I do recommend simply playing with the program and learning all of its features. Also, check out www.videohelp.com and www.doom9.org ... they can answer far more in-depth questions on Gordian Knot.

I am fluent in over six million forms of procrastination.
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Good luck!
I am fluent in over six million forms of procrastination.
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OK this is going to sound like a stupid question, but I'm new to this, and want to use your fantastic guide to work some magic on my LD capture of Star Wars from the 1989 release, and try and sync this up then to the pure 16-bit PCM capture from the same LD.

When you mention you need to download Gordian Knot, is Auto GK the same thing? Anyone have a link to the correct release please?

Many thanks.

70sFN
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OK have figured out how to do the above.

I have followed the guide on Page 1 to the letter, the problem I now have is trying to load my script into VirtualDubMod. It says "cannot use crop to enlarge or 'shift' a clip".

My source file is 4x3 NTSC, size 704 x 480 - how do I go about resizing this please?

Thanks!

- John

EDIT: Aha! After playing around settles on a crop of: 0,32,704,416

I left the lanczosresize commented (#) as it seemed to push the image down (using 704,480) according to the VDub preview. Was this correct?
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Glad you got it worked out. By the way, GK and Auto GK are NOT the same product. I have both. AutoGK is good for making DivX/Xvid files, but GK is good for getting all the helper apps properly installed and for setting up a basic AVISynth script.

I need to update the guide. You can load your .AVS scripts directly in TMPGEnc, bypassing the need to make an AVI in VirtualDubMod and saving a ton of room on your drive. Also, the latest version of Womble can do decent upmixing of 2.0 to 5.1 AC3. I've played with it some and gotten some reasonably good results.
I am fluent in over six million forms of procrastination.
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Would that make it possible to use an Audio CD and a 5.1 DVD in womble, and output a 5.1 file?

FE<3OT

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I believe so, yes. Makes me want to re-do Echoes/2001
I am fluent in over six million forms of procrastination.
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ADigitalMan - Your guide is great, and I hope to be one of the many who will benefit from it in the future, so please DO update it with any information that you think will be of interest, and of help to us. Many thanks.
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Updated the sections on 4:3->16:9 video and on 2.0->5.1 Audio
I am fluent in over six million forms of procrastination.
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ADigitalMan - Thanks, and it's much appreciated. Some of us need to stand on the shoulders of giants where certain knowledge is concerned... but this will hopefully allow us to produce better work for the benefit of all.
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Great guide, ADM.

I'm new to the world of fan edits, and I'm attempting one, but I've hit what seems to be a major snag.

I used DVD Decrypter to extract a movie to the hard drive. I used Womble MPEG Video Wizard to make my edits. And then I used NeroVision Express to author a new disc. The finished product would have been great but for one thing:

The video is choppy. Not horribly so, but enough that you might get a headache watching it. Looks as if a frame is skipped every second. What should be fluid motion turns into an effect that looks like the camera is moving around jerkily.

This is disheartening because I've seen customized movies that have no problem whatsoever. Yet I can't seem to get mine to work right. I've tried TMPGenc for the re-encoding phase, but to no avail. Only thing that helped was reducing the maximum bitrate, but even that didn't result in a perfectly clean copy.

What am I missing? Why am I getting jerky video? What are other editors doing that I'm not?

--THX

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Could be any number of things.  Most likely the combined bitrate is too high.  If it's not that, it could be that the source had two different framerates.  Or aspect ratios.  Or the settings of the export could have any number of flags.  I recommend checking those places first, and see if it resolves.  I've often had to mux a film over a dozen times before I'm happy with it.  I'll get all the way through previewing it and see a bad frame here or something off there and have to go back to the project file, make the trim or settings change, duplicate it in the audio, re-export the streams and re-mux the disc.

Blade Runner 2008 darn near killed me ... haven't done an edit in six months as a result, because I really wanted that one to be right and at the same time make fans as happy as possible with all the audio options.

In my early days of editing my problems were technical ones, not unlike what you're talking about.  Hopefully the points in paragraph 1 will help you out.

--ADM

I am fluent in over six million forms of procrastination.
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Is there any easy free way to just convert some of my vids from like avi to mp4? I would really rather not go out and buy software. Your help is most appreciated thanks!

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www.videohelp.com has info on the latest tools.  AutoGordianKnot is probably your best bet.

I am fluent in over six million forms of procrastination.
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ADigitalMan said:

www.videohelp.com has info on the latest tools.  AutoGordianKnot is probably your best bet.

 

 for mp4, and mkv, autogordian knot is outdated..

try autoMKV..

 

later

-1

[no GOUT in CED?-> GOUT CED]

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 This may have been covered before, but actually it is possible to crossfade ac3 in womble. Just not automatically. (as in you can't just hit a fade button).

You just load 2 tracks that overlap in Womble, use the point audio editor, have one fade out and the other fade in overlapping. Sorry this isn't a very detailed explanation, but I'm sure anyone who is willing to do this is capable of figuring it out.

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No need to use the point audio editor.

Just select an audio track, right-click and select "Fade" (Alt-F).  You can then set by frames, seconds or time code the fade-in at the beginning and the fade-out at the end for the clip.

By not using the point editor, Womble can output direct stream of the audio with only the fade in/out points being re-encoded.

Dr. M

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 In case you need to do ac3 editing beyond cutting the whole thing (such as muting a line but keeping the sound effects) the FREEWARE and excellent program Audacity now has full 5.1 ac3 support. No more hypercube transcoder and then wav to ac3 again, you can now just demux the ac3, edit in audacity, save and mux back again. I reccomend this, I've been using audacity for years for other audio, and now it has ac3.