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-
- HOW TO RUN EXTRACT
- ++++++++++++++++++
-
- Related Documents: Join (Version 3.06, 1 May,'94)
-
- Author: CRose
- Date: 29 April, 1994.
- Version: 2.19
- File Name: Extract
-
-
- WHAT DOES EXTRACT DO? Extracts one or more components of an Armovie file.
- -------------------- The extracted components can then be used by Join
- (see Join documentation) to build new Armovie files.
- You can extract the header, sprite, keys, images,
- and / or any or all of the sound tracks. Unlike
- version 2.00, it is now possible to extract
- sound and images simultaneously and any other
- combination of extracts is now possible.
-
- THE SOURCE DATA: All extract needs is the Armovie to extract from and a
- --------------- destination directory in which to place the extracts.
-
-
- EXTRACTING SOUND DATA: If you use the -sound parameter with Extract (see
- --------------------- examples below) but you do not specify which sound
- track/s you want, then by default only the first track
- will be extracted. Extract will use the Armovie's
- header to determine whether the sound is at four,
- eight, or sixteen bits per sample and will name
- extracted sound data accordingly. (At 4 bits per
- sample - "adpcm", at 8 bits per sample - "sound",
- and at 16 bits per sample - "samples"). If, for
- example you want to extract all the sound tracks
- from a 5 track Armovie where the number of bits
- per sample is:
-
- Track 1 : 4 bits per sample (adpcm).
- Track 2 : 16 bits per sample (samples).
- Track 3 : 8 bits per sample (sound).
- Track 4 : 8 bits per sample ((sound).
- Track 5 : 4 bits per sample (adpcm).
-
- ... then the resulting extracts will be:
-
- Track 1 : "Adpcm"
- Track 2 : "Samples"
- Track 3 : "Sound"
- Track 4 : "Sound2"
- Track 5 : "Adpcm2"
-
-
- PARAMETERS: The parameters for running Extract are as follows.
- ----------
-
- -source (necessary) The name of the Armovie from which to extract data.
- -dest (necessary) The name of an existing destination directory in
- which to put the extracted data.
- -header (optional) Extract the header.
- -sprite (optional) Extract the sprite.
- -keys (optional) Extract keys.
- -images (optional) Extract images.
- -sound (optional) Extract sound. Specific sound track/s can be specified
- (see examples below).
- -help (optional)
-
-
- By default, Extract will pull out all of the above if you only specify a
- source and destination (this includes ALL of the sound tracks). If particular
- components of the Armovie do not exist (e.g. if the Armovie has no keys), then
- Extract will simply generate warning messages and ignore the parameter concerned.
-
- For on-line help just type the name of the program followed by -help.
-
-
- EXAMPLES:
- --------
-
- Example 1: extract -help
- ---------
- This will give help information (although obviously it won't
- be as detailed as this document).
-
- Example 2: extract -source $.my_armovie -dest $.extracts -images
- ---------
- This will extract all the image data from $.my_armovie and
- place it in the extracts directory. The data is split up
- into separate files within one or more image directories
- ready to be used by Join at some later stage. If my_armovie
- is a sound only Armovie then Extract will warn you of this
- and ignore the extraction request.
-
- Example 3: extract -source $.my_armovie -dest $.extracts -keys
- ---------
- This will extract all the keys data from $.my_armovie and
- place it in the extracts directory. The data is split up
- into separate files within one or more keys directories
- ready to be used by Join at some later stage. If my_armovie
- does not contain any keys information then Extract will
- notify you of this and nothing will be extracted.
-
- Example 4: extract -source $.my_armovie -dest $.extracts -images -keys
- ---------
- This combines examples 2 and 3 above. Again, if images
- or keys do not exist in the Armovie file, Extract will
- issue appropriate warning message/s and will ignore the
- parameter/s concerned.
-
- Example 5: extract -source $.my_armovie -dest $.extracts -images -sound 3 5
- ---------
- This will extract all the images, along with the third and
- fifth sound tracks (if they exist).
-
- Example 6: extract -source $.my_armovie -dest $.extracts
- ---------
- In this case Extract tries to extract all the components of the
- ARMovie, i.e. header, sprite, keys, images, and all the sound
- tracks. If there are no keys then Extract will generate a warning
- message and will carry on with the remainder of the extracts.
- Similarly, if there is no image data or no sound data then
- Extract will tell you this before proceeding with the remainder
- of the extracts.
-
-
-
- OTHER POINTS WORTH MENTIONING:
- -----------------------------
-
- If you ask Extract to extract data which does not exist in the source Armovie
- file, it will notify you of this and will carry on doing any other extracts
- that you have asked for (if the data exists). The only exception to this is
- if you ask for a sound track which does not exist. In this case, Extract will
- tell you that the sound track does not exist and will end at that point.
-
- If Extract is terminated prematurely (e.g. user presses escape), an exception
- handler will ensure that any open files are closed. For obvious reasons this
- only applies to files opened by Extract.
-
- There are two classes of error message. Warnings may be ignored depending
- upon context and requirements (e.g. extraction of images when there are no
- images in the source file). Fatal errors will actually stop the program at
- that point. As mentioned above, an exception handler will ensure that any
- files opened by Extract are closed.
-
- As well as taking in parameters from the command line, Extract will also look for
- parameters held in the environment variable extract$ExtraArgs. The split can
- occur anywhere. e.g. extract -source $.MyArmovie -de may be entered on the command
- line, while st $.Extracts may be held in extract$ExtraArgs. Extract will simply
- join the two together to produce extract -source $.MyArmovie -dest $.Extracts .
-
- When extracting image data you should make a note of the number of frames
- per chunk that are in the ARMovie which you're extracting from. This
- information is on line 14. This is so that when it comes to using Join
- to build another ARMovie you are able to provide the correct number of
- frames per chunk in your own header when using these images (the correct
- number being exactly what it was in the first place). A good indication
- that you have the wrong number of frames per chunk in your header is that
- when you play the ARMovie, the picture will start off o.k. and will then
- become fuzzy and will then be o.k. and then become fuzzy, and so on.
-
- If you use Extract followed by Join and come to the conclusion that either
- Extract or Join is not working as it should, you should first check that
- your header is correct as this is usually the most likely source of error.
-
-
-
- DIFFERENCES BETWEEN CURRENT VERSION (2.19) & PREVIOUS VERSION:
- --------------------------------------------------------------------
-
- Wasn't checking to see if the last track was stereo or mono in multi-
- track ARMovies.
-
-
- OUTSTANDING:
- -----------
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-