http://bugs.cinelerra.org/show_bug.cgi?id=518

           Summary: Nonzero STARTSOURCE for image assets
           Product: Cinelerra
           Version: 2.1
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: Medium
         Component: User Interface
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


When middle-button dragging handles of an image snippet (when the asset is a
PNG image), the STARTSOURCE attribute (under the EDIT tag) is changed, as if it
was a clip. This would be correct behavior for a video clip asset, but not for
an image.

This messes up rendering and editing from that point on.

Reproducible: Always

Steps to Reproduce:
1. Create two subsequent edits, based upon images (PNG, JPG etc)
2. Middle-button drag the cutpoint between them.
3. Read the EDL file for the STARTSOURCE of these two edits.

Actual Results:  
STARTSOURCE of one of the edits becomes nonzero

Expected Results:  
STARTSOURCE must be zero at all times for an image (it has only one frame,
after all)

The easiest way to fix this seems to be to force STARTSOURCE to zero for image
assets no matter what at some checkpoint in software.


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