How to get duration from wmv file without playing it ?

Dear Friends

How can i read duration directly from wmv file without actually playing it ?

loading it in TMediaPlayer and read duration takes time , specially when 
there are too many wmv file.

is there any component to read some part of wmv file header directly and 
know duration and other properties


Thanks
Kamlesh 

you can use the IMediaDet interface under DirectShow

http://msdn2.microsoft.com/en-us/library/ms785892.aspx

although performance wise it is about the same as opening a file for 
playback.

Kamlesh wrote:
> Dear Friends
> 
> How can i read duration directly from wmv file without actually playing it
?
> 
> loading it in TMediaPlayer and read duration takes time , specially when 
> there are too many wmv file.
> 
> is there any component to read some part of wmv file header directly and 
> know duration and other properties
> 
> 
> Thanks
> Kamlesh 
> 

here's a Delphi example: http://files.dsp-worx.de/DXMIR.zip

you'll need DSPack if you want to use/compile

http://progdigy.com/modules.php?name=DSPack

harrie wrote:
> you can use the IMediaDet interface under DirectShow
> 
> http://msdn2.microsoft.com/en-us/library/ms785892.aspx
> 
> although performance wise it is about the same as opening a file for 
> playback.
> 
> Kamlesh wrote:
>> Dear Friends
>>
>> How can i read duration directly from wmv file without actually 
>> playing it ?
>>
>> loading it in TMediaPlayer and read duration takes time , specially 
>> when there are too many wmv file.
>>
>> is there any component to read some part of wmv file header directly 
>> and know duration and other properties
>>
>>
>> Thanks
>> Kamlesh

"harrie" <hpearce@magian[dot]com> wrote in message 
news:46bffcde@newsgroups.borland.com...
> Just found another interesting option using the open source codec tool 
> MediaInfo: http://mediainfo.sourceforge.net/en
>
> here's an example that wraps the MediaInfo.dll with Delphi - no extra 
> libraries required.
>
> http://forum.doom9.org/showthread.php?t=108800

I've used this, too. It's very effective. However, I'd suggest testing it 
against a number of sources and see how close the results are. You may find 
that there are differences between different sources, depending on encoding, 
use of digital right management code (DRM), compatibility with newer codecs, 
etc. 

Thank You Harrie

Regards
Kamlesh

"harrie" <hpearce@magian[dot]com> wrote in message 
news:46bf9bf0$1@newsgroups.borland.com...
> here's a Delphi example: http://files.dsp-worx.de/DXMIR.zip
>
> you'll need DSPack if you want to use/compile
>
> http://progdigy.com/modules.php?name=DSPack
>
> harrie wrote:
>> you can use the IMediaDet interface under DirectShow
>>
>> http://msdn2.microsoft.com/en-us/library/ms785892.aspx
>>
>> although performance wise it is about the same as opening a file for 
>> playback.
>>
>> Kamlesh wrote:
>>> Dear Friends
>>>
>>> How can i read duration directly from wmv file without actually
playing 
>>> it ?
>>>
>>> loading it in TMediaPlayer and read duration takes time , specially
when 
>>> there are too many wmv file.
>>>
>>> is there any component to read some part of wmv file header
directly and 
>>> know duration and other properties
>>>
>>>
>>> Thanks
>>> Kamlesh
>>>