<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hello,</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I couldn’t find a solution yet, but maybe someone else has an idea about this problem:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Scaling via sws_scale() works fine, if I extend width and height, or if I compress width. However if I compress the height, scaling is done, but bottom lines are black. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Example scaling from 800x600 -> 800x400: the lowest third of the frame is black.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks for any suggestion. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Max<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>// scale frame<span style='color:#1F497D'> code excerpt</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>static struct SwsContext* img_convert_ctx;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>avpicture_alloc ((AVPicture*)outFrame, outPixFmt, outWidth, outHeight);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>img_convert_ctx = sws_getContext (CodecCtx->width, CodecCtx->height, CodecCtx->pix_fmt, outWidth, outHeight, outPixFmt, sws_flags, NULL, NULL, NULL);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>sws_scale(img_convert_ctx, inFrame->data, inFrame->linesize, 0, outHeight, outFrame->data, outFrame->linesize);<span style='color:#1F497D'><o:p></o:p></span></span></p></div></body></html>