[Tech] Compression of a Video

Hey Folks
In follow some applications relating to the quality of ONE, here gets a little tutorial on how you get your Video small but fine
Preliminary
1.
We make a Movie for the PC, not for the TV. It is therefore wrong to be in the video InterlaceModus to calculate. With us only one question: Progressive Scan!
2. Since our video is for the PC, please make a video for your projects "Square Pixel".
How do I calculate the video in the editing program?
The best method is certainly the uncompressed video to calculate, or with a lossless codec, such as Huffyuv (about 50% compression ratio - the thing is free, so just google and install).
This is of course only if one uses 1) NTSF file system (more than 4 GB can manage large files), and 2) has enough disk space.
Alternatively, you can code the editing program out with a lossy codec. You should then set a very high bit rate. 10000-15000 or so. The higher the better. Then you also get a nearly lossless video file that is not too large.
The first method is to have enough space on the disk to be preferred
Compression:
Then you should encode the finished video using VirtualDub and XVid. Both are free! Just google it and download times.
The coding should proceed as follows:
First of all the settings of the codec - the actual coding is below:
Give the five minutes time, all set to:
In VirtualDub -> Video -> Compression -> Choose Xvid -> Configure
Profile at Level --> unrestricted
Click on the MORE button behind it ->
First Tab: Profiles
Quantisation: H.263
Adaptive quantization: YES!
Interlace Encoding: NO!
Quarter Pixel: YES!
Global Motion Compensation: NO!
B-VOBs: YES!
2 - 1:50 to 1:00
Packed Bitstream: Yes!
Second Tab: Level
You can set anything here, since working as unrestricted.
Third tab: Aspect Ratio
Square! Fingers away from other settings!
Ok, we are now back in the main window, Xvid
Encoding Type:
1) the first pass Twopass - 1st Pass
2) at the second round on Twopass - 2nd Pass
Target bitrate -> something between 800-1500 (which you then have to check them out - quality / size
Important: The higher the resolution of your videos the more you have to also adjust the bit rate of the codec.
(Be careful that it not "Target size" - is if this is so, press the button, then it turns arround)
Zone Options:
Here you can set different pack rates for specific sections of the Video- you dont need it really.
Quality preset:
User defined, and then click on the button More
First Tab: Motion
Motion Search Precision -> 6 - Ultra High
VHQ mode -> 4 - wide search
Use VHQ for bframes too> - YES!
Use chroma motion -> YES!
Frame drop ratio: 0
Maximum I-frame interval: always 10 times the FPS of the video. So at 25 FPS 250, 300 at 30 FPS ect
Second Tab: Quantisation
All leave it
Below Trellis quantization -> yes!
Now we are back in Main Window.
At the bottom, Other Options:
Encoder:
Xvid turn on and set a hook
Decoder:
Nothing click and Brightness in the center position
Common:
Automatically detect
that is al.
A few Instructions:
First, analyze the video with Twopass - 1st Pass. So import the video to make the above settings and then "Save as AVI".
That is really fast, at least faster than the 2nd pass
In a stats file is created in which remembers Xvid more or less how it will encode the video for good.
AFTER that we shall at Xvic Codec Twopass - 2nd pass and allow the entire charge again. Now it takes longer
Important: All settings must remain exactly as in the first round, when 1st Pass!
Only the bit rate may be changed, so you can try out with just a 1st pass at the second pass multiple bit rates to see which setting a most promise regarding size / quality.
It is absolutely amazing with the method, which for small but high quality video files are valid, if one adjusts only 850-1250 c / sec.
Another thing to sound:
It is also extremely important to encode the sound decent. This saves lots again on the MB's. This one can also use VirtualDub.
First audio -> full processing mode
Then Audio -> Compression
Search the list of codecs, an mp3 codec and configure it:
Take the best something between 128-192 kbit / s at 44.1 KHz stereo. Better quality can only hear sound engineer and would be a waste of space. Lousy quality sounds but also normal players out.
Should you have no mp3 codec, where you can set these bit rates, then please search via Google on the "Radium" mp3 codec. Download and install - then it appears in the codecs in VirtualDub.
Thats all- no more WMVs please
Original Text from Illunaghor German
Sticky please!
greetings,
Runen
In follow some applications relating to the quality of ONE, here gets a little tutorial on how you get your Video small but fine

Preliminary
1.
We make a Movie for the PC, not for the TV. It is therefore wrong to be in the video InterlaceModus to calculate. With us only one question: Progressive Scan!
2. Since our video is for the PC, please make a video for your projects "Square Pixel".
How do I calculate the video in the editing program?
The best method is certainly the uncompressed video to calculate, or with a lossless codec, such as Huffyuv (about 50% compression ratio - the thing is free, so just google and install).
This is of course only if one uses 1) NTSF file system (more than 4 GB can manage large files), and 2) has enough disk space.
Alternatively, you can code the editing program out with a lossy codec. You should then set a very high bit rate. 10000-15000 or so. The higher the better. Then you also get a nearly lossless video file that is not too large.
The first method is to have enough space on the disk to be preferred

Compression:
Then you should encode the finished video using VirtualDub and XVid. Both are free! Just google it and download times.
The coding should proceed as follows:
First of all the settings of the codec - the actual coding is below:
Give the five minutes time, all set to:
In VirtualDub -> Video -> Compression -> Choose Xvid -> Configure
Profile at Level --> unrestricted
Click on the MORE button behind it ->
First Tab: Profiles
Quantisation: H.263
Adaptive quantization: YES!
Interlace Encoding: NO!
Quarter Pixel: YES!
Global Motion Compensation: NO!
B-VOBs: YES!
2 - 1:50 to 1:00
Packed Bitstream: Yes!
Second Tab: Level
You can set anything here, since working as unrestricted.
Third tab: Aspect Ratio
Square! Fingers away from other settings!
Ok, we are now back in the main window, Xvid
Encoding Type:
1) the first pass Twopass - 1st Pass
2) at the second round on Twopass - 2nd Pass
Target bitrate -> something between 800-1500 (which you then have to check them out - quality / size
Important: The higher the resolution of your videos the more you have to also adjust the bit rate of the codec.
(Be careful that it not "Target size" - is if this is so, press the button, then it turns arround)
Zone Options:
Here you can set different pack rates for specific sections of the Video- you dont need it really.
Quality preset:
User defined, and then click on the button More
First Tab: Motion
Motion Search Precision -> 6 - Ultra High
VHQ mode -> 4 - wide search
Use VHQ for bframes too> - YES!
Use chroma motion -> YES!
Frame drop ratio: 0
Maximum I-frame interval: always 10 times the FPS of the video. So at 25 FPS 250, 300 at 30 FPS ect

Second Tab: Quantisation
All leave it
Below Trellis quantization -> yes!
Now we are back in Main Window.
At the bottom, Other Options:
Encoder:
Xvid turn on and set a hook
Decoder:
Nothing click and Brightness in the center position
Common:
Automatically detect
that is al.
A few Instructions:
First, analyze the video with Twopass - 1st Pass. So import the video to make the above settings and then "Save as AVI".
That is really fast, at least faster than the 2nd pass
In a stats file is created in which remembers Xvid more or less how it will encode the video for good.
AFTER that we shall at Xvic Codec Twopass - 2nd pass and allow the entire charge again. Now it takes longer

Important: All settings must remain exactly as in the first round, when 1st Pass!
Only the bit rate may be changed, so you can try out with just a 1st pass at the second pass multiple bit rates to see which setting a most promise regarding size / quality.
It is absolutely amazing with the method, which for small but high quality video files are valid, if one adjusts only 850-1250 c / sec.
Another thing to sound:
It is also extremely important to encode the sound decent. This saves lots again on the MB's. This one can also use VirtualDub.
First audio -> full processing mode
Then Audio -> Compression
Search the list of codecs, an mp3 codec and configure it:
Take the best something between 128-192 kbit / s at 44.1 KHz stereo. Better quality can only hear sound engineer and would be a waste of space. Lousy quality sounds but also normal players out.

Should you have no mp3 codec, where you can set these bit rates, then please search via Google on the "Radium" mp3 codec. Download and install - then it appears in the codecs in VirtualDub.
Thats all- no more WMVs please

Original Text from Illunaghor German
Sticky please!
greetings,
Runen
