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Re: Poster frame export to image


On 7-sep-06, at 21:03, Siddharth Mathur wrote:

I want to programmatically export the poster frame in a .mov video file to
an image (JPEG, TIFF etc.). The video track in the MOV can use (say) H264
or MPEG4-video compression. Can someone please point me to the correct API
to use for *decoding* the poster frame to a common format so that the
image exporter can work on it?

According to my current (rather imperfect) understanding, the approximate
steps as seen from a C program are :

1 Get PicHandle for poster frame
- GetMoviePosterPict(myMovie)

2 Open an importer (how do I pick the subtype?)
- OpenDefaultComponent(MovieImportType, XXX);

3 Convert PicHandle to a usable format
[video codec decoding?]

4 Export image to a JPEG, PNG or TIFF
- GraphicsImportExportImageFile()
- GraphicsImportSetDataHandle()

Something along these lines:

ci = OpenDefaultComponent( GraphicsExporterComponentType, 'jpeg' );
GraphicsExportSetInputPicture( ci, PicHandle picture);
GraphicsExportSetOutputDataReference( ci, dataRef, dataRefType);
GraphicsExportDoExport( ci, actualSizeWritten);

HTH,

Jan E.

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