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MPEG4 Video Encoding with MPEG2AVI |
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Written: September 04th, 2001 @ 22:15 GMT |
By: Thorsten
Titze |
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Software needed for this step of DVD conversion:
[MS
MPEG4v3 Codec Package]
[aMPEG2AVIGUI Release
1.45 (includes all tools)]
MPEG2AVI is a package for a) those who
know what they are doing since a lot of knowledge about
frame-sizes, rates etc. is needed and b) those
who want to get the movie done in no time. (A friend
of mine will soon get an Athlon ~900 and from calculation
this machine should be able to do conversion in real-time).
Follow this guide and it should to the trick:
- Download the MPEG4 Codec and run the executable.
(install all codecs that are offered)
- Download the aMPEG2AVI Package and unpack it into
a directory of your choice.
- Make sure you already decrypted all the files to your
harddisk
- Fire up FlaskMPEGEncoder
(this can help you determining the right cropping
values)
- Choose your VOBfile with File->Open
- Choose any audio stream in the selector
(doesn't matter now since we only want to get some
crop values)
- Choose menu Options->Global Project Options
- Select tab Video
- Enter appropriate framesize into Frame Size and select
appropriate Frames per Second !
PAL: 720 x 576 @ 25 fps
NTSC: 720 x 480 @ 23.976 fps
- Check the box MMX iDCT if you have an MMX
processor
- Select tab Post Processing
- Check the box No letterboxing
- Check the box Keep aspect ratio
- Push the button Show Output Pad
Reduce Height until lower black bar is gone
Increase Top Offset until upper black bar is
gone
Note:
With newer FlaskMPEG Version you may use drag'n'drop
on the frame around the picture to get the right values
!
If you can't get the image to correct size at first
just do the same procedure again..Reduce Heigt ->
Increase Offset until you only see the movie-picture
in the window
Push the button Hide
- Now keep the values you find in height and width in
your head or on a piece of paper !!!
- Fire up the aMPEG2AVI-GUI
NOTE:
After first installation it may be neccessary to set
all the paths to the binaries which lie in the directory
$aMPEG2AVIPATH\bin
To get into the configuration dialog press F11
- Press F6 which will open the File-List Editor
- Add all the files of your DVD, order them and hit
Save and Set
- In the part of the GUI called Profile Details
enter the FlaskMPEG Values
Crop @
Width x Height
- Set Downsize X to 720
Set Downsize Y to the same as height
- Click button Start Preview
- It is almost sure that the picture won't fill the
screen so increase Downsize Y
- Again click button Start Preview
- Do the above two steps until the picture looks
okay
- Go to the GUI at Advanced Options
- Select the appropriate framerate (fps)
PAL: -f2 [25]
NTSC: -f0 [23.976]
- Set output format to -o8 [AVI-YV12-4:2:0]
(the output format setting is cause for aMPEG2AVI
being faster than the older FlaskMPEG releases)
- Set reference quality to -r12 [16-bit MMX ChiDCT]
- In [File Locations] set the destination path
in OUTPUT
- Check the box HQ bicubic filtering
- Check the box Enable MPEG2AVI PX3 Mode
- Check the box Decode Only AC3/MP2 Stream
- Select your desired languageright to the checkbox
NOTE:
0x80 is mostly English
0x81 is mostly your local Language
- For a final preview hit Start Preview
- Now hit Start Encoding
- The AVI Compression Dialogue will appear
- Choose DivX Codec 4.01 Codec and hit Settings.
- Use the Quality slider and move it to 100 (Crispness)
- Set Keyframes every 4 seconds
- Set bitrate to the bitrate calculated by my Bitrate
Calculator.
- Hit Okay twice and conversion will start.
NOTE:
As you see this procedure is a bit more complicated. But
believe me, you will get used to it and the results are
amazing ! As I stated earlier a movie reaches ~12 fps
compression speed on my old Ahtlon 500. Not too shabby
compared with ~6 fps in FlaskMPEG !
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