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1JPEGTOAVI
2by Phillip Bruce
3
4
5I. Introduction
6
7In the tradition of the Unix computing philosophy, here is
8yet another operator that does one simple task, namely the
9creation of an AVI MJPEG file given a list of JPEG/JFIF files.
10
11I had some difficulty in performing this extremely simple task
12in Linux, mostly because it is so simple and all of the existing
13code to do it lie at the bottom of complicated and more ambitious
14projects--e.g. xawtv, avifile, etc. I then had to waste
15time reading M$ docs and xawtv source to find out how to do it.
16
17
18II. Installation
19
20The code is pretty basic, and so it should be pretty easy to
21install: "make all" compiles the program, "make install"
22installs it. If you want the files to reside in some directory
23besides /usr/local/bin and /usr/local/man, edit "Makefile".
24
25
26II. Usage
27
28There are three basic modes of operation:
29
301. jpegtoavi per_usec width height img1 [img2 ... imgN]
312. jpegtoavi -f fps width height img1 [img2 ... imgN]
323. jpegtoavi -fsz img1 [img2 .. imgN]
33
34The first two print an AVI to STDOUT using the width and height
35parameters and the images named in chronological order. (No
36checks are made on the validity of the JPEG/JFIFs or their
37dimensions.) The first mode specifies the frame rate in
38terms of the period in microseconds for each frame, whereas
39the second specifies frames per second.
40
41The third mode was added to give size hints during the transfer
42of AVIs without the use of a temporary file. Instead of
43generating the AVI it outputs the size in bytes that of the AVI
44that could have been generated.
45
46
47III. Contact, Bug Reports, and Suggestions
48
49Send them to me at dI77IHd@yahoo.com \ No newline at end of file