| Re: AVI reader/writer dll available [message #29675] |
Mon, 11 March 2002 14:22  |
Rick Towler
Messages: 821
Registered: August 1998
|
Senior Member |
|
|
> I got already a mail by Ronn and your informations are helpful too.
> If the AVI dll is using a standard windows dll
> it is not possible to change this code running on linux.
> But as I remember right there is a GPL licenced AVI Player
> and Source in my linux distribution.
> I will have a look on this if I got stuck I will ask you all again.
>
> regards
> Reimar
>
No, you can not just recompile the dlm c code on linux. But if you get a
hold of the source, it should be trivial to change the calls to the windows
codec (.dll) to ones appropriate for linux.
The AVI player you mentioned may only contain an avi decoder and you'll need
the encoder routines. Take a look at http://avifile.sourceforge.net/ I
didn't read any of the details but it looks like an active project
implementing different codecs on x86 linux. There are probably many others.
Search www.freshmeat.net.
Since AVI is more of a file format than a codec, you'll have to choose what
codec you want to use. This isn't clear cut but I recommend the latest
intel indeo encoder you can get your hands on. Either v4 or v5 will do. As
for visual quality they are about the same but v5 is faster (at least on
win32). Steer clear of Cinepack, MSCV (Microsoft Video 1) and motion JPEG
if at all possible. They produce lower quality video with lower rates of
compression.
Thinking about it, you should really check out the openDivX MPEG4 codec
(http://www.projectmayo.com). It is open source and there are win32 and
linux x86 versions. MPEG4 is an extremely good codec for video and my guess
is that it could be tuned well for sci animations. The only downside is
that widespread distribution of your DivX encoded video depends on the
viewer installing the divX codec (but this is the case with ANY decent
codec). I just looked at the source and there is at least adequate
documentation of the API.
good luck!
-Rick
|
|
|
|
|
|
|
|
|
|
| Re: AVI reader/writer dll available [message #29779 is a reply to message #29675] |
Wed, 13 March 2002 22:36  |
Rick Towler
Messages: 821
Registered: August 1998
|
Senior Member |
|
|
"Rick Towler" <rtowler@u.washington.edu> wrote in message
news:a6jart$2uko$1@nntp6.u.washington.edu...
>
>> I got already a mail by Ronn and your informations are helpful too.
>> If the AVI dll is using a standard windows dll
>> it is not possible to change this code running on linux.
>> But as I remember right there is a GPL licenced AVI Player
>> and Source in my linux distribution.
>> I will have a look on this if I got stuck I will ask you all again.
>>
>> regards
>> Reimar
>>
>
> No, you can not just recompile the dlm c code on linux. But if you get a
> hold of the source, it should be trivial to change the calls to the
windows
> codec (.dll) to ones appropriate for linux.
>
Upon further investigation, it seems like this isn't as trivial as I first
thought but still should be possible. I was really hoping to find a cross
platform solution but that might be wishing for too much.
Take a look at avifile (http://avifile.sourceforge.net). It should provide
a similar interface as the video for windows AVI* functions which are used
in the win32 version of IDLtoAVI. What is neat about it is that it uses
win32 codecs (so linux users have access to a wide range of codecs) but this
limits it to x86 linux. The documentation is thin but there are a few
examples that aren't bad.
-Rick
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
