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<blockquote data-quote="knutinh" data-source="post: 69194" data-attributes="member: 14776">1. Detect source film rectangle. It could be 4:3, 16:9, 2.35:1 or some other non-standard ratio. I dont know if MP receives such information with the DirectShow framework, and whether such meta info can be relied upon? For analog received tv I guess it receives only total pixel dimensions.Some smart algo could be used to filter in space and time to provide the most likely true movie inside black bars.2. Look-up user display. Could be 4:3, 16:9 but also 16:10, 5:4 rectangular or quadratic pixels.3. Use preferences to decide what horisontal/vertical scaling/cropping will be needed.[code]%detect source formatfor all lines&nbsp; if #black pixels &gt; 0.9x#pixels_per_line&nbsp; &nbsp; this line = black line&nbsp; &nbsp; if this line (last frame) = black line&nbsp; &nbsp; &nbsp; &nbsp; if all lines so far have been black&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; movie is below this line&nbsp; &nbsp; &nbsp; &nbsp; else&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; movie is above this line&nbsp; &nbsp; &nbsp; &nbsp; end&nbsp; &nbsp; end&nbsp; endend[/code]-k</blockquote>

[QUOTE="knutinh, post: 69194, member: 14776"] 1. Detect source film rectangle. It could be 4:3, 16:9, 2.35:1 or some other non-standard ratio. I dont know if MP receives such information with the DirectShow framework, and whether such meta info can be relied upon? For analog received tv I guess it receives only total pixel dimensions. Some smart algo could be used to filter in space and time to provide the most likely true movie inside black bars. 2. Look-up user display. Could be 4:3, 16:9 but also 16:10, 5:4 rectangular or quadratic pixels. 3. Use preferences to decide what horisontal/vertical scaling/cropping will be needed. [code] %detect source format for all lines if #black pixels > 0.9x#pixels_per_line this line = black line if this line (last frame) = black line if all lines so far have been black movie is below this line else movie is above this line end end end end [/code] -k [/QUOTE]

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