[Jffmpeg-devel] re win32 building

[Glick, G. (GE I. Security) <gen...@ge...>]

I don't know about the windows Vista problem, but it built in win2k.  =
Here's some things you need to know when building:

Prerequisites:
1. Msys
2. MinGw
3. Ant

First need to build ffmpeg binaries.  The directions say to build =
version 0.4.7, with a patch.  The link to this source is broken.  Go to =
http://www.salyens.com/mingw/ for the source code, including the patch =
they request.  Basically, the instructions on the salyens web page =
worked perfectly and it took just a few moments to build (1 ghz pentium =
III).

The instructions say to copy the libavcodec.dll to an 'appropriate' =
directory.  I assume system32 is correct - but I'm trying to sort that =
out.

Next, building jffmpeg.dll: =20
I ran into a couple of problems when following the jffmpeg build =
directions.  The file config.mak is supposed to be edited with =
appropriate environment variables (JMF_HOME, JAVA_HOME, FFMPEG_DIR).  =
Note that the build instructions say JMFHOME, but it must be type since =
the make files are all looking for JMF_HOME environment variable.  =
Regardless, when I set them in the config.mak file, things wouldn't =
build - javac couldn't be found, for example.  I commented the variables =
out in the config.mak file, then set them up in msys, for example:
 export JMF_HOME=3D/c/progra~1/jmf2.1.1e
 export JAVA_HOME=3D/c/progra~1/java/jdk1.6.0_02
 export FFMPEG_DIR=3D~/ffmpeg-0.4.7=20

Lastly, encoder.c threw a compiler error and it wouldn't build.  Here's =
the offending code, at line 42:

#ifndef CODEC_FLAG_RFC2190
#define CODEC_FLAG_RFC2190 0
#define CODEC_FLAG_MODE_A_ONLY 0
#endif
#define CODEC_FLAG_MODE_A_ONLY 0		=09

I added that last line to the file, and it built with a few warnings.  =
Since I don't know if it normally builds without warnings, I can't say =
if this is normal or not.

that's it.


________________________
Gene S. Glick
GE
Security
Senior Hardware Engineer
International Fiber Systems

T 203 426 1180
E gen...@ge...

16 Commerce Road
Newtown, CT 06470 USA