Convert Hight Quality

wget "https://page.isu.pub/160531035941-2c1369e3b81c6cf676ab963ba568dfe8/swf/page_1.swf"
swfrender -X 1300 -Y 2100 page_1.swf -o page_2.png
convert -verbose -density 300 -trim page_2.png -flatten -sharpen 0x1.0 page_2.jpg

https://stackoverflow.com/questions/6605006/convert-pdf-to-image-with-high-resolution