| MPEG4 in IDL [message #34226] |
Fri, 28 February 2003 07:58  |
Haje Korth
Messages: 651
Registered: May 1997
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Senior Member |
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Hello everyone,
I was wondering if anyone has written MPEG4 videos in IDL yet. If so, please
let me know how to get/compile the necessary libraries. Thanks for helping.
Haje
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| Re: MPEG4 in IDL [message #34351 is a reply to message #34226] |
Tue, 04 March 2003 05:00  |
Haje Korth
Messages: 651
Registered: May 1997
|
Senior Member |
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Rick,
Thanks for the further info. No, I haven't tried this particular the v5.5
DLM with IDL 5.6. However, I have used a different DLM that required
compilation separately for each of the past three IDL version (5.4-5.6). I
assumed it would be no different for the AVI DLM. By the way, Ronn Kling
already sent the DLM by mail.
When you said that you wanted to extend the DLM, I was wondering if you
actually have the source code?
Greetings,
Haje
--
"Rick Towler" <tsehai@attbi.com> wrote in message
news:TDQ8a.342912$be.316899@rwcrnsc53...
>
> "Haje Korth" wrote ...
>
>> thanks for your hint. I had heard of the AVI DLM before but I did not
not
>> that you can use it with other codecs. Now I just have to convince Ronn
to
>> produce an IDL 5.6 compatible version....
>
> Yes. It is a nice feature of VFW. Just so you know, aviIDL will produce
an
> AVI as the name suggests, not an .mpg file. It is a matter of file
format,
> not compresion technique. It probbaly won't matter but you could use
> avi2mpg or a similar program to convert the .avi to an .mpg file if you
> really needed the file in MPEG format. Also, I have used the Microsoft
> MPEG4 codec V2 without problems but the V3 codec hasn't worked. I didn't
> investigate much since I mainly use the DivX codec anyway.
>
> If I remember correctly, one limitation is that you will need to call the
> configuration dialog to select a different codec than raw uncompressed
> (which is the default). I haven't worked with it lately so I don't
remember
> if you need to do this every time you open a file for writing or just the
> first time. This would be an issue if you needed to automatically process
> data without user intervention. I was going to extend the dlm so that you
> could pass codec and codec parameters from IDL but that never happened.
>
> Another possible issue is with windows XP. One user has encountered
issues
> with the dlm and winXP but I don't know if the problem was resolved.
>
> Out of curiosity, have you tried the 5.5 version with 5.6?
>
> -Rick
>
>>
>>
>> "Rick Towler" wrote in message
>
>>>
>>> "Haje Korth" wrote...
>>>
>>>> I was wondering if anyone has written MPEG4 videos in IDL yet. If
so,
>>> please
>>>> let me know how to get/compile the necessary libraries. Thanks for
>>> helping.
>>>
>>> Yes and no. Are people encoding their IDL animations using MPEG4,
yes.
>> Is
>>> this being done in IDL, no.
>>>
>>> There have been a few hints here and there that people were thinking
> about
>>> writing a platform independent <insert codec here>.dlm but I think
that
>>> these projects all stall when the authors learn the amount of work
>> involved.
>>> For most it is hard to justify the investment in time when you can
> simply
>>> write the frames in IDL and use another application to encode them
into
>> the
>>> movie file of choice.
>>>
>>> The only .dlm I know of which allows you to create MPEG4 videos in IDL
> is
>>> Ronn Kling's aviIDL package. This windows only dlm is essentially a
>> wrapper
>>> for the video for windows interface which allows you to use the codecs
>>> installed on your machine to encode frames from within IDL. You still
>> will
>>> need to come up with the codec yourself. The dlm can be found here:
>>> http://www.kilvarock.com/freesoftware/dlms/avi.htm
>>>
>>> -Rick
>>>
>>>
>>
>>
>
>
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| Re: MPEG4 in IDL [message #34360 is a reply to message #34226] |
Mon, 03 March 2003 14:25 |
Rick Towler
Messages: 821
Registered: August 1998
|
Senior Member |
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|
"Haje Korth" wrote ...
> thanks for your hint. I had heard of the AVI DLM before but I did not not
> that you can use it with other codecs. Now I just have to convince Ronn to
> produce an IDL 5.6 compatible version....
Yes. It is a nice feature of VFW. Just so you know, aviIDL will produce an
AVI as the name suggests, not an .mpg file. It is a matter of file format,
not compresion technique. It probbaly won't matter but you could use
avi2mpg or a similar program to convert the .avi to an .mpg file if you
really needed the file in MPEG format. Also, I have used the Microsoft
MPEG4 codec V2 without problems but the V3 codec hasn't worked. I didn't
investigate much since I mainly use the DivX codec anyway.
If I remember correctly, one limitation is that you will need to call the
configuration dialog to select a different codec than raw uncompressed
(which is the default). I haven't worked with it lately so I don't remember
if you need to do this every time you open a file for writing or just the
first time. This would be an issue if you needed to automatically process
data without user intervention. I was going to extend the dlm so that you
could pass codec and codec parameters from IDL but that never happened.
Another possible issue is with windows XP. One user has encountered issues
with the dlm and winXP but I don't know if the problem was resolved.
Out of curiosity, have you tried the 5.5 version with 5.6?
-Rick
>
>
> "Rick Towler" wrote in message
>>
>> "Haje Korth" wrote...
>>
>>> I was wondering if anyone has written MPEG4 videos in IDL yet. If so,
>> please
>>> let me know how to get/compile the necessary libraries. Thanks for
>> helping.
>>
>> Yes and no. Are people encoding their IDL animations using MPEG4, yes.
> Is
>> this being done in IDL, no.
>>
>> There have been a few hints here and there that people were thinking
about
>> writing a platform independent <insert codec here>.dlm but I think that
>> these projects all stall when the authors learn the amount of work
> involved.
>> For most it is hard to justify the investment in time when you can
simply
>> write the frames in IDL and use another application to encode them into
> the
>> movie file of choice.
>>
>> The only .dlm I know of which allows you to create MPEG4 videos in IDL
is
>> Ronn Kling's aviIDL package. This windows only dlm is essentially a
> wrapper
>> for the video for windows interface which allows you to use the codecs
>> installed on your machine to encode frames from within IDL. You still
> will
>> need to come up with the codec yourself. The dlm can be found here:
>> http://www.kilvarock.com/freesoftware/dlms/avi.htm
>>
>> -Rick
>>
>>
>
>
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| Re: MPEG4 in IDL [message #34363 is a reply to message #34273] |
Mon, 03 March 2003 13:23 |
Haje Korth
Messages: 651
Registered: May 1997
|
Senior Member |
|
|
Rick,
thanks for your hint. I had heard of the AVI DLM before but I did not not
that you can use it with other codecs. Now I just have to convince Ronn to
produce an IDL 5.6 compatible version....
Greetings,
Haje
--
"Rick Towler" <rtowler@u.washington.edu> wrote in message
news:b404fc$22ps$1@nntp6.u.washington.edu...
>
> "Haje Korth" wrote...
>
>> I was wondering if anyone has written MPEG4 videos in IDL yet. If so,
> please
>> let me know how to get/compile the necessary libraries. Thanks for
> helping.
>
> Yes and no. Are people encoding their IDL animations using MPEG4, yes.
Is
> this being done in IDL, no.
>
> There have been a few hints here and there that people were thinking about
> writing a platform independent <insert codec here>.dlm but I think that
> these projects all stall when the authors learn the amount of work
involved.
> For most it is hard to justify the investment in time when you can simply
> write the frames in IDL and use another application to encode them into
the
> movie file of choice.
>
> The only .dlm I know of which allows you to create MPEG4 videos in IDL is
> Ronn Kling's aviIDL package. This windows only dlm is essentially a
wrapper
> for the video for windows interface which allows you to use the codecs
> installed on your machine to encode frames from within IDL. You still
will
> need to come up with the codec yourself. The dlm can be found here:
> http://www.kilvarock.com/freesoftware/dlms/avi.htm
>
> -Rick
>
>
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