[Dcmlib] multiframe streaming

[ahmed saad]

Hi Mathieu,
    Thanks for reply. We hope we have to get something useful for the GDCM/VTK community.

Regarding ffmpeg/vtk, I think they use ffmpeg in VTK just for writing avi video on non-windows platform but not for display videos. Actually vtk has vtkwin32videosource but it only grabs frames from a capture video not from external file. So I hope I can change vtkWin32Videosource to grab from the external dicom file using the GDCM. 
  I think GDCM read the multiframe dicom all at once. So we need to figure out how to read the frame on demand (e.g an event)

Best regards,
Ahmed Saad


----- Original Message ----
From: Mathieu Malaterre <mathieu.malaterre at gmail.com>
To: ahmed saad <ahmedalysaad2004 at yahoo.com>
Cc: dcmlib at creatis.insa-lyon.fr
Sent: Saturday, August 18, 2007 12:26:44 AM
Subject: Re: [Dcmlib] multiframe streaming

Hi Ahmed,

  That look pretty cool, is this a student project ?
  My guess is that the easiest solution for you would be to reuse
ffmpeg approach (GPL license). They divide their code into the codec
and the file format. For the file format you simply have to use gdcm
code into the ffmpeg framework. And for the codec, it will depend on
your code, for mpeg2, reuse the ffmpeg one, for raw image, I am pretty
sure they have something already.
  Once this part is done, VTK CVS has a ffmpeg bridge, so this part
should be transparent (hopefully).

  Subscribe to ffmpeg mailing list and start from there. There code
base is very readable (if you skip all the crazy optimization
details).

HTH
-Mathieu

On 8/18/07, ahmed saad <ahmedalysaad2004 at yahoo.com> wrote:
>
> Hello,
>     I'm new to GDCM from VTK/ITK background. I would like to implement a
> simple multi-frame dicom viewer so you can play it as a video (e.g. for
> cardiology applications).
>     Multi-frame dicom loops might be large. So a streaming frames on demand
> might be a solution instead of loading the whole loop on memory.
>     Is there any hint to do that in GDCM and vtk.
> Best regards,
> Ahmed
>
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-- 
Mathieu







       
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