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Over 5 Hours on a Single, Recordable DVD-5 (4.7 GB)
Anyone who has been authoring DVD's for a while, has come across the problem
where they run out of space. Or in some cases they need a hell of a lot of
space. If that description fits you, then you have come to the right
place. Here we show you how to fit over 5 hours of video on a single
recordable DVD-5 with 4.7 GB of storage space. This is not something to
use for "The Matrix" or "Star Wars" of course - but for stuff like
documentaries, doubling up old movies, home video clips, etc - it is fine..
First off - if you don't believe it
Here is a link to a 500 kB (1/2 MB) clip cut out "directly" from my own project DVD source files. It is one of the 62 source video clips that fit easily onto the DVD with room to spare, and the quality, although nothing to rave about . . . is fine. The compression was achieved by using low resolution files at a high data rate. This way, the loss of detail is shown as soft edges, which are a result of the size being blown up. NOT as the usual crappy artifacts and jagged edges !! This DVD is perfectly "watch-able" and no one that has viewed the DVD has felt it is poor quality.
Play 500 kB Sample Clip Full
All I can say . . . is try it - you'll like it !!!
***here is another longer sample clip with an intro from the Host, Shannon Dougherty (2 GB)
Still not convinced? Burn your own test DVD !! Here is a 20 second clip (5 MB) from the same video that I used on the DVD. You can download it and use your own DVD Authoring package to burn a single 20-second video DVD, and then play it on your big screen TV.
The custom DVD label for my own Test Project DVD
(I used Photoshop for the image and Neato's MediaFace 4.0 to align and print the label - MediaFace is a great label maker)
Now we do the math for the proof :
The sample clip from above is 500 kB, which is .5 MB = .0005 GB, and plays for 2.03 seconds
To find out how many of these .0005 clips we can fit onto
one 4.7 GB DVD, we need to divide:
4.7 GB divided by .0005 GB = 9,400 clips (the DVD disc can fit approximately 9,438 video clips of this size)
Total playtime = 9400 clips x 2.03 sec/clip = 19,082 sec
there are 3600 secs in one hour, so Playtime in hours = 19082 / 3600 = 5.3 Hours
Adjusting for Overhead - a typical video DVD with several menus, and no "extras" - will require about 3% overhead for the menus. So the actual playtime is 97% of 5.3 Hours, which is .97 x 5.3 = 5.14 Hours (still over 5 hours)
High Quality MPEG-1 SIF (352x240) source files that max out the allowable data rate
The Goal in making a super-compressed DVD - is to identify a video converter utility that will make a super-compressed MPEG files and a DVD Authoring utility that will accept those files - thereby enabling us to fit tons of video, with "acceptable" quality . . . on a DVD recordable disc. This also requires that any MPEG files that we create must be accepted by the DVD Authoring program that we select. In this section we will include the actual converted test video files, so you can see the results for yourself.
Here we show you how this method was discovered, through tons of testing using various video formats, various encoder packages, and various DVD authoring utilities. Finally we show you the exact steps used to create one of these I used the following formats with a number of converters for comparison:
Video Formats - a Quick Review
Standard MPEG Resolutions
used for . . .
DVD player takes the "height" of the video frames, and adds signaling for vertical retrace. For example, the full vertical NTSC interlaced resolution is 525 lines, so an analog TV:
the 8 pixels on either edge of the video frame aren't supposed to contain useful information. Therefore, some programs will prefer the cropped D1 resolution to save bandwidth
Many ask, "why 352 instead of 360, which is exactly 1/2 x 720 ??" This is because the MPEG structure uses 16x16 "macroblocks", and therefore the horizontal dimension must be divisible by 16. 352 is divisible by 16, and 360 is not.
sometimes inaccurately called "1/4 D1"
|1/4 SIF||PC video clips||180x120||N/A||
used to be common - now rare due to high resolution displays and video cards
NOTE: some people use the term "D1" with an
assumtion that it is NTSC
it can be either so make sure to always indicate NTSC or PAL !!
NTSC D1 vs PAL D1
They both transmit the same data rate !! We show this in the table below:
|D1 Type||Resolution and FrameRate||Pixels in one Frame = width x height||Data Rate in Pixels per sec =pixels per frame x frames per sec|
720x480 pixels at 30 frames per sec
720x576 pixels at 25 frame per sec
Video Formats used for testing
This has been a long project, consisting of over a hundred hours of testing, along with the purchase of tons of DVD utilities.
MPEG-1 SIF - 352 x 240, 1150 kbps CBR, Audio data rate 224 kbps,
Audio sampling 48 kHz* (had to go well above 1150 kbps as you will see)
MPEG-2 SIF - 352 x 240, 2000 kbps CBR, Audio data rate 224 kbps, Audio sampling 48 kHz
MPEG-2 1/2 D1 (HHR - Half Horiz Res) - 352 x 480, 2000 kbps CBR, Audio data rate 224 kbps, Audio sampling 48 kHz
* even though 44.1 kHz is more common for MPEG-1 SIF, some DVD authoring packages, such as DVD-Lab will not accept MPEG-1 at 44.1 kHz
MPEG-1 vs MPEG-2 - surpsisingly, I ended
up choosing MPEG-1. The conversion was faster, it was more reliable,
and the quality was great (I mean . . . great for a highly compressed video
stream). The goal here is
maximum compression at an acceptable quality. Therefore we don't care
whether that requires MPEG-1 or MPEG-2. In fact, MPEG-1 SIF is
basically identical to MPEG-2 SIF in quality. MPEG-2 should be a bit
better - however, I did not notice a difference. However, the MPEG-1
standard does not allow for 352x480 video. In fact, not all DVD
Authoring programs will accept MPEG-2 at 352x480, so we also need to keep
nthat in mind.
defining "acceptable" - we define "acceptable" as being a bit soft looking around the edges - but not objectionable and free of artifacts and noise. You can always compress down by reducing the data rate, but that is where you get artifacts, streaking, ghosting, etc. This is why we max out the MPEG-1 data rate (Video = 1602 kbps) as far as the DVD software will allow. To keep out the damn artifacts !! Even while maxing out the video data rate to 1602 kbps, it is still a small fraction of typical MPEG-2 DVD video data rates, which vary from 6000 to 9000 kbps !!
Video Converters Tested:
Womble MPEG Video Wizard, CucuSoft, Ultra Video Splitter, IMtoo MPEG Converter, WinAVI Video Converter. Each has their own problems, except TMPGenc Express, which seems to be trouble-free..
Play these test files yourself - there is a huge world of difference going from DVD-compliant MPEG-2 files at 352x240 vs 352x480 when using Womble (which sucks for MPEG-1 conversions) - but TMPGenc Express created 352x240 SIF files that look just as good as the 352x480 1/2 D1 files !! That was quite a surprise. Still, if you go with 1/2 D1 MPEG-2 instead, you will still be able to squeeze a LOT of video onto one disc, because even though there are twice as many lines, for some reason the file sizes are only about 15% larger than the SIF files - another surprise :
Womble Converted Files
Play Womble sample conversion - MPEG-2, 352x240
NOTE: the edge jaggies are from the "Womble MPEG Converter" - which is why I no longer use it
Play Womble sample conversion - MPEG-2, 352x480
using this size got rid of the jagged edges - but they should not be there in the MPEG-1, and
it is unacceptable to have to go to this size just to have something watch-able
TMPGenc Express 3.0 Converted File
Play TMPGenc Express 3.0
sample conversion - MPEG-1, 352x240 clip
NOTE: no jagged edges - excellent quality.
Play full-screen for an idea of what it will look like if use for a DVD.
My favorite out of all the converters I have tried !!
Why Compress DVD's down so Much ??
There are a few cases where you might want to compress the hell out of your video and store it in the DVD structure on your PC - or burn it onto a DVD-recordable disc:
use DVD's to backup old VHS tapes where you are not concerned with high quality but want to store several tapes onto one DVD
transmit DVD's over the Internet by posting them to alt.binaries.movies, or storing them on a server for download
store more than one movie on a single DVD
create DVD with numerous Menus and hours and hours of your favorite clips, and send it to friends and family as a gift
There are also VCD groups on UseNet, but although VCD's give you highly compressed MPEG1 on a CD, that does not give you much play time and not nearly enough for a movie.
What DVD Authoring Utilities will accept as Input
Here are the allowable standards for MPEG-2 video as shown by TMPGenc DVD Author, and as you can see, there are several acceptable resolutions. The framerate is also called "Hz" (Hertz):
NOTE: the acceptable input source file resolution can vary from utility to utility
Both 720x480 and 704x480 are from the NTSC's CCIR 601
352x240 is for both MPEG-1 and MPEG-2, and is also called SIF (Source Input Format), also known as Low Level (LL)
352x480 is for non-interlaced, which is called "progressive" scanning - used at 24 fps
The Compression Method Explained (the key to this entire technique)
There is no magic here. You do lose quality, as you always will when compressing. However, this method chooses the type of quality that it lost - edge sharpness and resolution. Much of the higher data rate bits in digital images and in video are used for sharp edges. Soften the edges and you don't need the bits. video The only degradation is that the video gets a bit "soft" around the edges. It does not have the artifacts that we are so used to seeing with MPEG-1 clips. This is why you should use the maximum legal data rate. This is not great quality - of course not, since it get's doubled in size - but it is perfectly "watch-able" and not bad at all.
Take the following image.
Original Image - resolution 400x533 - File Size is 45 k
Here we will compare two ways of compressing - this is a still image, but since video is nothing more than images stuffed into frames . . . the same theory applies:
leave it at full-size,
and just compress down the quality to make it very "lossy"
take the same image, keep it sharp and clear but shrink it down in resolution to half the display size. And let the viewer blow it up to twice its size, making it the same display size as the original image.
Image 1 - Original Image - 45 k Image 1a - Original Image saved at high compression - 18.4k artifacts are everywhere !!
Image 1 - Original Image - 45 k Image 1b - Original image resized by 50% (200x267)
18.4k - same file size as 1a, but Clear. But it is small
Image 1b - this is the same 200x267 18.4k small pic, but it is being blown up by the display here.
Right-click to download it and open it in another image viewer to see - it is a small, postage-stamp size pic !!
The HTML code lists the pic size as 400x533, forcing the browser to resize it
But the file is still the same, and is only 18.4 k
Slightly "soft" edges, but still very clear !!! So much better than the full-size compressed image - NO Artifacts !! THIS IS THE SECRET TO THIS METHOD !!! Compression by using a small display resolution and letting the DVD player blow it back up - not by quality reduction !!
Round-Up of the Utilities
The following is the results of about 3 months of testing . . . for in-depth statistics I used GSPOT to get data rates, video and audio parameters such as aspect ration, CBR vs VBR, sampling rate, etc. I used the "MPEG-2 Validator" to give a count of I, B, and P frames in any MPEG-2.
When testing, and even when creating DVD's you often need to play a VOB file separately, or play an MPEG-2 file. Sounds simple - but it is not. VOB files contain video that is streaming at very high data rates . . . about 6000 to 9000 kbps. A lot of players, even if they accept VOB format, can't keep up.
*** Number 1 *** MPC - Microsoft's Media Player Classic v18.104.22.168 - works well, and you should definitely get this freebie. It is the old "Active Movie" player. Someone dug it of the archives because people like us needed to be able to play many different video formats, and WMplayer just was not engineered correctly and has never been able to decode the more complex formats such as MPEG-2 and MP4. Mplayer Classic does a good job of playing most VOB, MPEG-2, and even MP4 files (get the 3ivx codec to play these). In addition, if it can't keep up with the VOB data rate, there is a "Decrease Speed" button on the console.
WMP - Microsoft's WMplayer - whether you have v9, 10, or 11 - you will not be able to play MPEG-2 files properly with WMplayer. Forget about it.
VLC Media Player - this has been dubbed the "it will play anything you throw at it" player. For files it does not have a codec for - it uses "Fake codec" as a workaround.
VOB to MPEG-2 Converters
The Mixed Menu VOB File ( VTS_01_0.VOB ) is the biggest
challenge for conversion. It is often called a "mixed VOB" and it is
normally the first VTS_01_0.VOB file. The problem with conversion is that
it can contain still menus, motion menus, menu transition clips, etc. Only
Womble, which is not even a "player" per se . . .
successfully converted those files. In fact, only Womble played them
properly. I was able to play them with MPC, but had to slow down the speed
quite a bit.
Nothing worked on Menu Vob's except Womble !! Video Redo, TMPEexpress, and TMPGenc Plus all failed. With Video Redo Plus I was able to convert the menu VOB to MPEG-2 but it converted only the first 5 seconds of the 15-sec VOB, and the rest was lopped off for some reason. I opened that MPEG-2 in TMPGenc Express and it could only see the first frame !! It played through the clip and audio was fine, but only the first frame showed. Then I tried opening the converted MPEG-2 with TMPGenc Plus - and it also showed only one frame - but that frame was the "last frame" of the MPEG-2.
*** Number 1 for Menu VOB's *** Womble MPEG Video Wizard - this was the only converter that converter the Menu VOB file perfectly. The only diff was that the converted file's duration (13:26) was a couple of seconds less than the original VOB (15:08). This is due to the first 4 "still menu" frames. In the VOB, as I single-stepped through the I-frames starting at the beginning:
*** I am not sure why the menu stills are placed 1/2 sec apart in the VOB. Perhaps that is a DVD structure standard so that the player can identify them as Menus, and NOT videos.
*** Number 1 for Movie VOB's *** Video ReDo Plus - converts the VOB files from a DVD to MPEG-2 without having to re-encode. So it does it extremely fast.
Conclusion - you just can't convert a "menu VOB" to MPEG-2 100% correctly. There is no 1-to-1 relationship because of the way Menu stills are placed every 1/2 sec in the VOB, and that spacing is lost when converted to MPEG-2. And you certainly can't edit a converted menu VOB in MPEG-2 format, convert back to VOB, and expect it to work.
Video Conversion Utilities that do not Re-Encode
*** Number 1 *** Video ReDo Plus - converts the VOB files from a DVD to MPEG-2 without having to re-encode. So it does it extremely fast. Nothing is as fast as Video Redo . . . nothing. We're talking a few minutes for a 1 GB VOB file to MPEG2 conversion. It is a bit expensive for a 1-trick pony ($50), but it is a must for any DVD video buff.
Problem - it does not work properly on VOB files with menu transitions - in a test sample I used several Root menu to sub-menu transitions in both directions. DVD-Lab placed the still menu images and the video transition clips all into the same VOB (VTS_01_0.VOB).
*** BUT it works fine for all other VOB's (the video VOB's) - and those are the VOB's you will be using it for anyway - not the Menu VOB !!!
Boilsoft Splitter & Boilsoft Joiner - this combo allows you to rework the MPEG clips for a DVD movie where you just want to cut out and keep portions - FAST. You can actually join "n" clips in DOS using "copy /b file1.mpg+file2.mpg+ . . . .+filen.mpg fileout.mpg" - but you cannot split them. The Boilsoft joiner makes it much easier and faster than using DOS.
Video Conversion Utilities that Re-Encode (i.e. "transcode")
*** Number 1 *** TMPGenc Express 3.0 (they now have 4.0 released) - this is the hands-down winner and the undisputed king of video converters. The other ALL have multitudes of problems, and there are so many problems that it is truly unbelievable. But not Express 3.0 - it is almost perfect, and as far as the converted files - when it says "standard" it means it !! You can count on these conversions - you can rely on them. They work and they look great. And most importantly - the DVD Authoring Utilities will accept these files !!!
Nero Recode 2 - trumpeted as the "holy grail" of compression, it is not what it seems and I have not figured out a use for it yet. It is two utilities - an MP4 (proprietary codec) converter, and a recoder. Like DVD Shrink, you can use this to throw out certain parts of a DVD and recook it. But you can't use its MP4 compression for DVD's - at least not that can play on anyone player. This utility makes MP4 files in a proprietary format, that can only be played on WinXP with the Nero codec - or with the 3ivx codec installed and using WMplayer v6.4. To me, the compression is not better than DivX or Xvid - sure you can compress way, way down - but the video becomes blurry and unusable if you do that. The fact that Nero Recode MP4 files require users to have installed a special codec, makes it pretty useless for the masses. Great potential though, if Microsoft releases an upgrade that has the codec, so everyone can play the files.
Womble MPEG Video Wizard - the fastest, smoothest MPEG2 NLE (timeline) editor. You can scrub through an MPEG-2 clip smoothly on the timeline - amazing because no other editor I know of can do that. This is GREAT - GREAT !!! It lets you set up In and Out points, split, join, etc - then create a batch process to output all the clips to MPEG1 or MPEG2. I loved this program, until I saw the resulting video clips !! Creates 352x240 MPEG-1 files with horrible "jaggies" on the edges. Even higher resolution MPEG's have slight jagggies. This was such a wonderful app too !! It is the only MPEG-2 editor that allows you to smoothly scrub through and preview a huge VOB file. Oh well, too bad.
WinAVI Video Converter - the fastest VOB <--> MPEG2 converter that re-encodes (Video ReDo does not re-encode). Su, unlike Video ReDo you can change display size, framerate, etc. Also works with RM and WMV and AVI. This is the fastest converter I have tried and I have a ton of them. However it has incredible errors in the program itself:
I emailed their "support" 3 times and they replay with "non-answers" such as "the clipping function does not work with clipping because that would slow the program down" - STUPID answer !! BUT for doing what it does - convert fast - it works very well.
IMtoo MPEG Converter - this "was" my favorite - but not any more !! It still is the simplest, smallest, and most powerful interface. and it does convert virtually any format to any format, including iPOD mp4 (both 30GB and 60 GB iPod - and it has a profile for each. Also, it can can quickly and easily create custom conversion profiles, and can stack up videos in a list and even apply different conversions to each file, and then let it run as you go watch TV.
CuCusoft converter - works with mutiple formats but I had flashing white artifacts in my MPEG-2 converted files that had light, flowing grey backgrounds (cannot handle slightly varying shades apparently).
Total Video Converter - has many many formats, but I do not like the interface. You have to go to a separate window to select the format and then come back to the main window.
Ultra Video Splitter - converts and splits VOB files to MPEG1/2, AVI, WMV. It has major drawbacks !!! Here they are:
EXTREMELY SLOW !!!
Cannot set a "default" Output folder
NO PRESET PROFILES. no way to create or save PROFILES
NO AUDIO SETTINGS !!! You have to accept the aduio you get. So for MPEG-1 files, for example that you want to use with DVD-Lab for DVD authoring - you can't because they all come out at 44.1 kHz audio sampling rate, and DVD-Lab insists on 48 kHz.
FAKE HIGH RES VIDEO !!! I finally figured out how they keep the file sizes so small even at "higher resolutions". They fake it !! The file size is kept so small because it replicates data into large "blocks". Viewing the MPEG-2 at full screen size you can really see this !!!The resulting video clips are all the same, highly compressed size no matter what the resolution is !!! Here is the surprise, using a short 10-sec segment on all files, using Audio of 224 kbps in all cases:
File Type Bitrate MPG Size Burned VOB Size
MPEG1 352x240 1522 kB 1401 kB
MPEG1 352x480 1510 kB 1387 kB
MPEG2 352x240 1381 kB 1502 kB
MPEG2 352x480 1397 kB 1518 kB
MPEG2 720x480 1503 kB 1635 kB
I used Gspot to verify the resolution of the files and they were all correct. BUT The resolution of 352x48- is twice that of 352x240 yet the file sizes and bit-rates are basically identical. And even the full 720x480 file is not much larger than the 352x240 !!!
These are the smallest size 720x480 MPEG-2 files I have ever seen - if only they were "real". But as stated this is done by faking it. The 720x480 is actually large blocks (4x4, 8x8 or maybe 16x16 - not sure) of identical pixels. DO NOT USE THIS UTILITY !!!
DVD Authoring Utilities
*** Number 1 *** MediaChance DLD Lab Pro - I finally figured out how to use DVD-Lab Pro, and it was well worth the time to figure it out. It has so much more power than DVD Author that there really is no comparison. I now realize, is that I was wrong about the elemental streams taking forever. I had been using TMPGenc Plus to demux, and it does take a long time - but somehow DVD-Lab does it in a fraction of the time. It demuxes a 5-minute video clip in about 30 seconds. It does require twice as much drive space because it keeps the original mpg file and create one mpv and one mpa file. But with today's monster drives, even that is not a problem. Plus when finished - after testing the DVD you can delete the files.
The DVD-Lab "connections" page is extremely helpful to understand and see what is going on. It shows the complete DVD layout, along with lines and arrows that show how everything is connected. And you can change the structure byt simply drawing in your own lines. Awesome. I can link to any menu from any menu and then back again. I can play single clips and return to the menu even in "sub menus" (which DVD Author cannot do). And you can also create "Playlists", which allows the user to play any single clip and return, or click "Play All".
Here to see an actual
DVD Connections page
of a very complex DVD, with 1 main menu, 3 sub-menus, and 54 video clips
I am sure there are many other high-end DVD Authoring programs that can also do these things, but DVD-Lab is very cheap, considering all that it can do.
SONIC Reel DVD - very difficult to learn and use. Like DVD Lab Pro, it also only works with elemental streams. At least it does automatically convert program streams. BUT it took every single "DVD Compliant" MPEG-2 that I threw at it and complained about problems (except for Womble exported MPEG-2 files). The most common error was "GOP length" errors but there were a few others. Even TMPGenc converted "DVD-cinmpliant" MPEG-2 files resulted in import errors. Very confusing program too.
TMPGenc DVD Author v1.6- stay away from v2.0 (v2.1 is OK though). The most user-friendly DVD Authoring package of all. But it has major menu limitations. Only the Main menu can contain "tracks". All sub-menus can ONLY contain "Chapters". In otherwords, each sub-menu is a single Track, and that single Track contains multiple "Chapters". You cannot create a sub-menu that has buttons that link to other sub-menus. You cannot play a "Chapter" on a sub-menu and have it return to the sub-menu when completed - it will always play ALL subsequent chapters. For example, if you click on Chapter 3 and there are 11 Chapters in that sub-menu, then it will play Chapters 3 through 11 before returning. You cannot create a custom menu EXCEPT for those based on the Templates. When you click "Edit Menu Theme" you are shown a series of "Templates" to choose from, and you cannot add objects to them.
ULEAD DVD Workshop 2.0 - the best "all around" DVD Authoring program - great interface, very user friendly, and somewhat powerful (though not nearly as powerful as DVD-Lab). You can have any menu link to any other menu. Great player within lets you view every clip. But for my own case - both v1.3 and 2.0 have no sound with certain PC's, including my Dell Dimensions. I spent 2 years emailing ULEAD about this and working with them to get it fixed. Never happened - so on both of my Dell machines, it has no sound in the final DVD output (works fine in the DVDWS player). It does have sound on my other machines but they are slow. It could be the Powerleap upgrade CPU and not the Dell, because both my Dell's have a Powerleap processor installed. But I doubt it.
*** Finally - How to Create Super-Compressed DVD's ***
The Goal - create a DVD that can store either 2 to 3 movies combined, or tons of video clips all on one disc. For short video clips I wanted them to return to the menu upon completion and NOT continue to the next clip, which is why I had to use DVD Lab and NOT USE DVD Author. I also wanted the user to have the "option" to play all clips sequentially. The following meets all of these goals.
The Method - use High-Quality MPEG-1 files as inputs to DVD-Lab, with the following settings:
MPEG-1, 352x240, Video Data Rate 1602 kbps CBR, Audio data rate 224 kbps, Audio Sampling Rate 48 kHz, Frame Rate 29.97 fps
The Software Packages - there is only one VOB-toMPEG-2 converter on the market that does it at high-speed, without re-encoding, and that utility is . . .
Video ReDo Plus !!
After months of testing, I have found that virtually ALL video converters except one, have major flows and mistakes in them. And I mean major !! The only one that is accurate, fully featured, reliable, and powerful, is . . . .
TMPGenc Express 3.0 !!
The same can be said for "affordable" DVD Authoring programs. They are all lacking in some major way, or they have some major limitation . . . all except one . . .
Mediachance DVD-Lab Pro !!
Introduction to this Technique
After studying and testing for months . . . I ended up with a preference for high quality MPEG-1 or MPEG-2 SIF files at 352x240. I have no preference between MPEG-1 and MPEG-2 at this video size, since visually you cannot tell the difference. So I use MPEG-1 because MPEG-2 did not give me any apparent quality difference and the utilities convert MPEG-2 more slowly. It all gets converted in the end to "MPEG-2 like" files (VOB) anyway, by the DVD Authoring program.
The Key - convert the Video to small Display size, 352x240 MPEG-1's while maxing the data rate - letting the DVD Player Expand them to Full Screen.
The purists will frown upon this technique, and they are right as far as authoring excellent "showpiece" DVD's. But that's not what this is about - so let them frown while you kick back with a bunch of snacks and beer and watch over 5 hours on one disc !! This method works and it works very well. You have to see it to believe it.
The trick is to convert your video to the highest quality 352x240 MPEG-1 files as you can !!! Keep in mind that we will be using very small videos, and your player will be doubling their size . . . so in order to have decent results, you will need very high quality clips.
To do that, you max out the DVD standards. You create 352x240 clips with the highest allowable data rate. DVD Author is a great yardstick as far as testing the DVD compliancy of files - if it will accept the file, you can bet it is DVD compliant !!! BUT realize that other programs such as DVD-Lab are much more forgiving of things like data rates, so you may wish to go that route instead.
This means exceeding the usual standard MPEG-1 video bit rate of 1150 kbps, yet still staying within the upper limit . DVD Author will complain if you create an MPEG-1 with too high a data rate, and will refuse the file. It will even refuse an MPE-1 at 2000 kbps, which is fairly common. The message it gives is:
1856 kbps is the max MPEG-1 data rate
(as a side note - for MPEG-2, it says the max is 9800 kbps)
Calculating the max Data Rate
It is very important to realize that 1856 kbps is the TOTAL Data Rate not just the video data rate.
Total Data Rate = Video + Audio + Control bits
Most video conversion utilities allow you adjust the video and audio streaming data rates separately. Then when the mpeg is playes, the streams combine into one total data rate. If you use TMPGenc Express 3.0 and set it to 1856 kbps, you will be setting the Video data rate. Then the total bit rate (you can use GSPOT to view that) comes out to 2110 kbps (1856 video + 224 audio + 30 control) !!! So for Express 3.0, the rule of thumb, if using 224 kbps for audio, is to subtract that audio + control bits (which is 254 since 224+30=254) from the max data rate to get your video data rate. So the max video data rate you should use for MPEG-1 is:
1602 kbps CBR !!!
(1602 kbps CBR video data rate = 1856 total - 224 audio - 30 control)
NOTE: using 1602 places you right at the upper limit - so if DVD Author still complains, then simply shave a bit more off the video data rate in the Express 3.0 converter, and use something like 1580 kbps
The Steps to create a 5 Hour DVD
Here are the steps and the software I use:
1) if you are taking your source video from
existing DVD's - decrypt and save the DVD VOB's to hard drive and go
to Step 2
if you are using your own footage - capture the Mini DV footage as AVI files to
your hard drive (or MPEG files of your capture card supports it) and skip to Step 3
2) use Video Redo to combine all VOB's and save them to a single, Huge MPEG-2 file - (the audio will stay in synch, and the conversion will be done extremely fast since Video ReDo does NOT re-encode)
3) use TMPGenc Express 3.0 to make the cuts and convert the files - this utility is preferred because it allows CBR, which is the standard for DVD MPEG-1 at 352x240 - whereas IMtoo does not allow CBR) to put in all your clip cuts and convert the huge MPEG2 file to numerous MPEG-1 files at 352x240. Make sure to use the following settings:
MPEG-1, 352x240, Video Data Rate 1602 kbps CBR, Audio data rate 224 kbps, Audio Sampling Rate 48 kHz, Frame Rate 29.97 fps
*** if using TMPGenc Express 3.0 make sure to set the VBV buffer size less than 40 kB (I use 32 kB)
4) use a reputable DVD Authoring package to Author the DVD (I prefer DVD-Lab Pro):
If you are lucky enough to have DVD Lab Pro ($199, don't even bother with the regular DVD Lab for $99) - then here are some tips. It is the best DVD package for the money and man is it ever powerful !! The sky's the limit on what you can do.
*** scroll down for details on DVD Lab Pro, Elemenral Streams, and file type Conversions ***
My own Project DVD's Final Results
As to the super-compressed DVD's, it is amazing how good the videos actually look on my big-screen TV, considering they are MPEG-1 files. Try making a short sample and see for yourself !! Again - the trick is using very high quality MPEG-1 at much higher data rates than most MPEG-1 files.
Here I have used I used high quality source video and used the highest "legal" MPEG-1 data rate for the target video - which according to TMPGenc is 1856 kbps. I set the video to 1602 kbps, the audio to 224 kbps, and that leaves enough room for the 30 kbps mpeg-1 control bits. The data rate is about 1/4th that if a standard DVD, but about 3 times that of a standard desktop video clip. So this is a "happy medium" between compression and quality.
3 DVD's into 1 - for my own test project I compressed all 3 DVD's from the 1st Season of "Scare Tactics", which is 53 video clips, plus 8 clips from the 2nd Season onto one DVD. I ended up with a whopping 61 video clips a total playtime of 3.13 hours, with 3.9 GB of space taken up - leaving a ton of space leftover if I decide to add more later (800 MB leftover space).
The menu selection allow the user to watch any single clip and return to the menu - or he can click the "Play All Clips" button at the upper right of each screen to play all the clips on that screen sequentially. Since I had so much leftover space I added 8 clips from Season 2 and created the 4th Menu.
The final DVD - file structure
3.9 GB required - disc capacity is 4.7 GB
the 4 DVD menus
System Stream <-----> Elemental Streams
To convert from system to elemental streams - you de-multiplex the single file containing the single system stream (video and audio streams that are interlaced together into a single stream) into two separate streams in two files (one video and one audio).
To convert elemental streams to a system stream - you multiplex two elemental streams together to form one stream of interlaced video and audio data.
The Elemental Stream File Types
Common Video Elemental Stream files - mpv (MPEG-1 Video) or m2v (MPEG-2 Video)
Common Audio Elemental Stream files - AC3, mp2, mpa, wav, and LPCM (pcm or raw)
NOTE: surprisingly, the most popular audio file . . . MP3's . . . are not used by most DVD Authoring packages
MP2 (MPEG-1 audio Layer 2) vs MPA (MPEG Audio - Layer I, II, or III)
These are very similar files. But are different formats, and utilities always seem to support one or the other - not both. DVD Lab will import either and can use either as the audio stream for any movie on the DVD.
NOTE: quite a few utilities will actually allow you to change the extension mp2 to mpa and will work fine that way !! In general there should be no need to do this - but I include it here because it has been mentioned so many times in other discussions.
MP2 (MPEG-1 Layer 2 Audio) vs MP3 (MPEG-1 Layer 3 Audio)
MP2 is usually 196 or 224 kbps at 48 kHz sampling. MP3 is usually 128 to 256 kbps at 44.1 kHz sampling. MP3 has better compression and allows for "joint stereo".
How to get your Audio into Elemental Stream Formats:
There are many conversion utilities - so use whatever works for you. Here I have listed the utilities that I use, personally, and can vouch for:
AC3, MP2, WAV - use IMtoo to open these files and convert to other formats - or use IMtoo to export any other audio file to these formats
MPA - creating MPA files is not easy because very few utilities support conversion to mpa. The only utility I am aware of is DVD Lab, which creates mpa files on the fly as soon as you import an mpg file (it automatically demuxes mpg to two elemental stream files . . . mpv and mpa). You can use Adobe Premiere to import mpa but not export to mpa (the Main Concept MPEG encoder can only create system streams, "mpg" only). Even the old workhorse, TMPGenc Plus, cannot save to mpa format. It does have a built-in utility called "MPEG Tools" that can mux an mpa together with a video stream into an mpg system stream . . . but it cannot creat mpa files.
But don't worry - you will probably never need to create an mpa file. And if you do need one (for a DVD Lab project, for example) the utilities that require mpa files come with their own demux routines or a transcode routine to create the mpa file for you.
MP2 - use IMtoo or TMPGenc. Both utilities can open mp2 files and they can export to mp2.
MPG to MPA - use DVD Lab to import mpg and it will demux the file into mpv and mpa elemental streams
MPA to MP2 - open the mpa in Premiere, export to wav, open wav in IMtoo, and export to mp2
MP2 to MPA - open MP2 in IMtoo, export to wav OR in DVD Lab, goto Tools/Transcode Audio . . . . click Input and select the MP2, and then click "Transcode" and the MPA will be created in the same folder
LPCM - unlike many other DVD authoring utilities, DVD Lab will not accept LPCM (*.pcm or *.raw). Go to the LPCM conversion tool (Tools / LPCM>wav), open the pcm/raw file and transcode it to wav OR just use the main DVD Lab Tools/Transcode to convert LPCM--->WAV or WAV --> LPCM
Now author the DVD - see DVD Lab Pro Details
Lab Quick Tutorial
MediaChance DVD Lab
Home (for both Standard and Pro versions)
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