Extract Embedded images from mp3,wav,avi,mpeg files.

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Hi,

I need to extract embedded images from various audio/video files without using any external libraries. I have already extracted image from MP3 file (from the Id3v2 header) by reading it in binary.

But I am not able to find way to do the same for other formats. I am trying to lokk into the headers to find information on image.

Kindly help.

Thank you!

Posted 6-Aug-11 6:06am

VinayChoudhary99

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mbue 6-Aug-11 15:32pm

You cant find any because there arnt any images inside the wav, avi and mpeg formats. The thumbnails in the explorer view are created on the fly by supporting IExtractImage from the files persist handler.
Regards.

VinayChoudhary99 8-Aug-11 4:16am

Hi, Thank you. That should work. But I am trying to extract first frame from video file and then use it. Can you please tell me how to do that, or give me some links.

Thank you.

mbue 8-Aug-11 4:35am

Walk through the registry and look for the persist handler of the file types. You can use the IPersist (IPersistFile, IPersistStream) to load the objects. After loading you can ask (QueryInterface) the persist object for the IExtractImage interface. Another way is to use (i.e. ffmpeg) to extract a frame on a given timestamp.
Regards.

VinayChoudhary99 10-Jan-12 2:38am

Thank you, your solution works. If you could post a solution i could accept it as an answer!

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mbue · Answer 1 · 2012-01-10T01:51:00

You cant find any because there arnt any images inside the wav, avi and mpeg formats. The thumbnails in the explorer view are created on the fly by supporting IExtractImage from the files persist handler.
Walk through the registry and look for the persist handler of the file types. You can use the IPersist (IPersistFile, IPersistStream) to load the objects. After loading you can ask (QueryInterface) the persist object for the IExtractImage interface. Another way is to use (i.e. ffmpeg) to extract a frame on a given timestamp.
Regards.