Making High Def Video Files: Mpeg2 and DIVX in VS9.0

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jchunter

Making High Def Video Files: Mpeg2 and DIVX in VS9.0

Post by jchunter »

You can enjoy your videos together with your still digital photos in vastly improved sharpness when displayed on your PC monitor and eventually on your big-screen HDTV set.

First, download some high definition Mpeg2 HDV files or buy a Sony HD-HC1 camcorder. :) Video Studio 9.0, with the HDV plugin installed, will capture in mpeg2 HDV from the Sony. Set Capture properties to frame size of 1440 x 1080, Widescreen (16x9). Since I don’t have an HDV camcorder, I downloaded a WMV file from www.WMVHD.com and converted it to mpeg2 HDV 1440x1080 pixels with Video Studio 9 with the HDV plugin, which decided that the field order was Frame-Based. Then I proceeded as follows:

(1) Set up the Project properties by dropping an HDV video clip in the timeline and let VS9 set properties for you. Properties will be close to the following:

NTSC drop frame (29.97 fps)
MPEG files
24 Bits, 1440 x 1080, 29.97 fps
Frame-based (the HC1 native field order is Upper Field First, so use that for HC1 native video)
(MPEG-2), 16:9
Video data rate: 25000 kbps
Audio data rate: 384 kbps
MPEG audio layer 2, 48 KHz, Stereo (or Dolby)

(2) Edit your HDV video file in Video Studio as usual, making cuts and inserting transitions. Be sure to insert still digital photos in full resolution because they will benefit greatly from high definition format. Do not expect smooth playback in Edit Mode around transitions and you will not be disappointed. Tip: Insert a digital slide of a video resolution chart, so you can compare resolution later.

(3) MPEG2 HDV: Create your project video file in the SHARE tab / Create Video File. If you want to preserve the mpeg2 HDV format, set the properties as follows:
A) Select SaveAs Mpeg
B) Select Custom / Options
C) Check Smart Render and Non-Square Pixel Rendering
D) General Tab: Audio/Video: Frame-based, Width:1440, Height: 1080, Aspect Ratio 16:9
E) Compression Tab: Mpeg2, max quality, Variable Data Rate: 25000kbps. Click OK
F) Name your output file and hit the Save button.
G) Playback your file on PowerDVD, the VLC media player*, or WMP (if you must)
H) Observe that the converging lines on the resolution chart get twice as close before blurring together (Score 6.5 compared to the same project rendered at DVD standard 720x480 – score 3.25).

(4) DIVX HD: If you want to save a lot of file space** you can try a codec with higher compression, such as the Divx6 codec (downloadable from www.divx.com). Select SHARE tab / Create Video File and set properties as follows:
A) Select SaveAs AVI files
B) Select Custom / Options
C) Check Smart Render and Non-Square Pixel Rendering
D) General Tab: Audio&Video: Frame-based, Width:1440, Height: 1080, Aspect Ratio 16:9
E) AVI Tab: Select DIVX 6.0 codec
F) Hit the Configure button and set the following parameters:
  • a) Main Tab Certification Profile: “Unconstrained”; Bitrate Based: 8000kbps,
    b) Codec Tab: “Insane Quality”,
    c) Video Tab: Custom Resize: 1440x1080; Resize Filter: I used “Bicubic Sharp”; Audio: I used Mpeg layer 3 (mp3). Hit OK on the Codec screen
G) Hit OK on the Options screen.
H) Name your output file and hit the Save button. My video rendered a 30 second video in 12 minutes, so a 10 minute video will require about 4 hours… Better try a short video to get all the procedural kinks ironed out before attempting a long masterpiece.

Note: I downloaded the Beta version of the Divx He-3 codec and ran the same conversion test, which ran in 6 minutes flat! Twice as fast. Same quality evident on the resolution chart. File size was slightly smaller at 28MB.


* Download from http://www.versiontracker.com/dyn/moreinfo/win/27193
** My Divx file was about 30% (28.8MB) of the size of the Mpeg2 HDV file (97.7MB).
Last edited by jchunter on Wed Apr 12, 2006 2:30 am, edited 1 time in total.
jchunter

Divix High Definition Profile

Post by jchunter »

If you are wondering why the Divx codec profile has to be set to "Unconstrained" rather then "High Definition" setting for the 1440x1080 frame size, it is because the Divx High Definition profile is limited to a 1280 x 720 frame size. In other words, it includes only the 720 line progressive part of the high definition standard. This means that a Divix Certified piece of hardware (e.g., a Divx DVD player) may not play back a video that is encoded with the Unconstrained profile. :shock:

You can produce Divx files with 1280x720 quality by selecting the 'High Definition" Profile in step 4.F above, "Extreme" Quality", and manually entering the target frame size of 1280x720.

The Divx "DVD Create" package is available for free trial download at http://www.divx.com/divx/create/download/ which provides the Divx Pro codec version 6.03, a Divx player application for the PC, the "Divx Converter," and the "Divx to DVD" burner.

I was rather disappointed to find that the Converter simply "dumbed down" my 1440x1080 HDV video file (and 1280x720 as well) to a frame size of 720x400, which resulted in a severe loss of image resolution.

The Divx to DVD burner does the same thing, producing a standard definition grade DVD with the same loss of resolution.

The Divx player works OK and is able to playback 1440x1080 Divx video files. However, there are excellent free players available (e.g., VLC Media player, link listed on above post).

All in all, if you want to produce Divx files of all resolutions, you can do the whole enchilada with Video Studio 9 and the Divx codec. Unfortunately, you have to Download the complete package to get the codec.
THoff

Post by THoff »

jchunter

Post by jchunter »

Quote: "NHK developed a Super Hi-Vision camera equipped with 8 megapixel CCD image sensors that can take 4k x 8k images"

Torsten,
I think they would need four of these 8MP CCDs to get the 32 MP image.

But IMHO, they need to use a CMOS sensor chip, to compress the image immediately on the chip to reduce the bandwidth off-chip to the storage unit - probably hard disk.

It's nice to see that somebody is thinking ahead to the next stage. Someday, we will be papering the walls of our houses with displays for these images... :shock: :)

John
al4085
Posts: 10
Joined: Wed Aug 17, 2005 7:20 am
Location: Singapore

Once we have a HD file, how to put it on Disc ?

Post by al4085 »

Understand how to produce a 16/9 HD file now, but are we forced to read it from the hard Drive ? What if we want to burn it on a DVD to watch on a "normal" DVD player ?

Andre
André
jchunter

Post by jchunter »

al4085 Andre,

Sorry, but I didn't see your question until today (four months later.) :roll:

The answer is that you can't burn high definition video on an ordinary DVD and play it back on an ordinary DVD player.

However, you can burn a high definition video file on an ordinary DVD AS A DATA FILE and play it back with a new style of DVD player such as IO-DATA AVLP2 ( http://www.iodata.com/usa/products/prod ... P2%2FDVDLA ), which has a fast processor chip that can read data files from DVDs (just like your PC), decompresses the video and plays it on your HDTV through the component video interface. I isn't perfect but its the best game in town. :D
al4085
Posts: 10
Joined: Wed Aug 17, 2005 7:20 am
Location: Singapore

Post by al4085 »

Thanks.... I probably went for the rich option and bought a Sony Media Center... works quite well, although it seems that 1080i files in mpg are not always recognized by windows m.p.e... depending of the screen resolution. so still not perfect !!!

Bu I enjoy my holiday footage in HD now !

Andre
André
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