I am trying to do a little overlay test but cant work out why one works and one fails, the input file i use is one of my SD stream captures from BBC News, so a generic SD video will suffice
The 2 command lines Working ffmpeg -i <any input video file> -vcodec libx264 -preset ultrafast -b 3000k -acodec libfaac -async 1 -r 25 -filter_complex 'color=s=640x360:c=#80808080 [o1];[0:v] scale=640x360,drawbox=100:100:100:100:color=green [o0];[o0][o1] overlay' -y -f mpegts a.ts This give the desired result or an opaque screen overlayed over video Non working one ffmpeg -i <any input video file> -vcodec libx264 -preset ultrafast -b 3000k -acodec libfaac -async 1 -r 25 -filter_complex 'color=s=640x360:c=#80808080,drawbox=100:100:100:100:color=red [o1];[0:v] scale=640x360,drawbox=100:100:100:100:color=green [o0];[o0][o1] overlay' -y -f mpegts a.ts On this i get the color screen with no transparency and the red box Any ideas why adding a drawbox will make the color layer lose its transparency joolz _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
