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<blockquote data-quote="ziphnor" data-source="post: 93927" data-attributes="member: 14215">I think i managed to make some progress. After much reading of Direct3D documentation i managed to copy the surface upon which the video is drawn using StretchRect to an offscreen surface in ARGB format which is much more friendly and is for example accepted by D3DXSaveSurfaceToFile.This is a major step forward, i now need to make this new frame grab approach accessible to the C# side autocropper in a performance friendly way (ie we dont want to grab the frame each and every frame!), and then we should have ourselves a nice autocropper mostly implemented in friendly C# ....And for this approach i have a hard time seeing what could go wrong ( famous last words <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" /></blockquote>

[QUOTE="ziphnor, post: 93927, member: 14215"] I think i managed to make some progress. After much reading of Direct3D documentation i managed to copy the surface upon which the video is drawn using StretchRect to an offscreen surface in ARGB format which is much more friendly and is for example accepted by D3DXSaveSurfaceToFile. This is a major step forward, i now need to make this new frame grab approach accessible to the C# side autocropper in a performance friendly way (ie we dont want to grab the frame each and every frame!), and then we should have ourselves a nice autocropper mostly implemented in friendly C# .... And for this approach i have a hard time seeing what could go wrong ( famous last words ;) [/QUOTE]

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