At 2015-06-28 00:50:30, "Paul B Mahol" <[email protected]> wrote: >On 6/27/15, qw <[email protected]> wrote: >> At 2015-06-27 00:21:56, "Paul B Mahol" <[email protected]> wrote: >>>On 6/26/15, Paul B Mahol <[email protected]> wrote: >>>> On 6/26/15, qw <[email protected]> wrote: >>>>> Hi, >>>>> >>>>> I use the below command to blend logo image and video together with >>>>> transparent effect: >>>>> ffmpeg -i ./file1.mp4 -i ./logo.jpg -filter_complex >>>>> blend=all_mode=overlay >>>>> ./file3.mp4 >>>>> >>>>> >>>>> >>>>> But the command requires the same resolution from logo image and video. >>>>> If >>>>> the size of logo image is different from or smaller than that of video, >>>>> the >>>>> command will report error. >>>>> >>>>> >>>>> How to blend image and video with different size? Could you provide >>>>> some >>>>> command examples? >>>> >>>> You could crop logo and use expressions in blend filter to pick right >>> >>>Instead of crop I meant pad filter. >>> >>>> combination of pixels at any position of image. >> >> >> I try to use pad filter. If the logo image has no transparent background, I >> can make a video with transparent effect by using the below command: >> ffmpeg -i ./video.mp4 -i ./logo.png -filter_complex >> "[1]pad=640:480:10:10:black[logo];[0][logo]blend=all_expr='A*(if(gte(X,10)*lt(X,256+10)*gte(Y,10)*lt(Y,256+10),0.5,1))+B*(1-(if(gte(X,10)*lt(X,256+10)*gte(Y,10)*lt(Y,256+10),0.5,1)))'" >> -strict -2 ./output.mp4 >> But if the background in the logo image is transparent, the resulting video >> is not good. I can see a clear rectangle around the logo in the resulting >> video. If the area around logo in resulting video is the pixel of input >> video, and no rectangle can be seen, the resulting video will be correct. >> >> >> How to make a resulting video with a transparent logo image, in which: >> 1) the area around logo is the pixel of input video; >> 2) no rectangle around the logo can be seen; >> 3) the logo is transparent; >> >> >> How to make it? > >Can you provide link to logo.png ?
http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&ipn=d&word=%E9%80%8F%E6%98%8E%20png&step_word=&pn=15&spn=0&di=24863833610&pi=&rn=1&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=23891&cl=2&lm=-1&st=-1&cs=630043753%2C2759659245&os=1637287401%2C3456218485&adpicid=0&ln=1993&fr=%2Cala&fmq=1435427460192_R&ic=0&s=undefined&se=1&sme=0&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&objurl=http%3A%2F%2Fup.ekoooo.com%2Fuploads2%2Fallimg%2F080730%2F0718443.png&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bjh5555_z%26e3Bv54AzdH3Fp7ktw5xtwg2f7p7h7AzdH3Frg2AzdH3Fda8aa9AzdH3Fa9-9c9d89_z%26e3Bip4s At 2015-06-28 00:50:30, "Paul B Mahol" <[email protected]> wrote: >On 6/27/15, qw <[email protected]> wrote: >> At 2015-06-27 00:21:56, "Paul B Mahol" <[email protected]> wrote: >>>On 6/26/15, Paul B Mahol <[email protected]> wrote: >>>> On 6/26/15, qw <[email protected]> wrote: >>>>> Hi, >>>>> >>>>> I use the below command to blend logo image and video together with >>>>> transparent effect: >>>>> ffmpeg -i ./file1.mp4 -i ./logo.jpg -filter_complex >>>>> blend=all_mode=overlay >>>>> ./file3.mp4 >>>>> >>>>> >>>>> >>>>> But the command requires the same resolution from logo image and video. >>>>> If >>>>> the size of logo image is different from or smaller than that of video, >>>>> the >>>>> command will report error. >>>>> >>>>> >>>>> How to blend image and video with different size? Could you provide >>>>> some >>>>> command examples? >>>> >>>> You could crop logo and use expressions in blend filter to pick right >>> >>>Instead of crop I meant pad filter. >>> >>>> combination of pixels at any position of image. >> >> >> I try to use pad filter. If the logo image has no transparent background, I >> can make a video with transparent effect by using the below command: >> ffmpeg -i ./video.mp4 -i ./logo.png -filter_complex >> "[1]pad=640:480:10:10:black[logo];[0][logo]blend=all_expr='A*(if(gte(X,10)*lt(X,256+10)*gte(Y,10)*lt(Y,256+10),0.5,1))+B*(1-(if(gte(X,10)*lt(X,256+10)*gte(Y,10)*lt(Y,256+10),0.5,1)))'" >> -strict -2 ./output.mp4 >> But if the background in the logo image is transparent, the resulting video >> is not good. I can see a clear rectangle around the logo in the resulting >> video. If the area around logo in resulting video is the pixel of input >> video, and no rectangle can be seen, the resulting video will be correct. >> >> >> How to make a resulting video with a transparent logo image, in which: >> 1) the area around logo is the pixel of input video; >> 2) no rectangle around the logo can be seen; >> 3) the logo is transparent; >> >> >> How to make it? > >Can you provide link to logo.png ? >_______________________________________________ >ffmpeg-user mailing list >[email protected] >http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
