Which ffmpeg command to use convert pngs to video? I have pngs starting from temp0000.png and ending at temp7085.png.

After reading the ffmpeg manual I tried the command:

ffmpeg -i temp%d.png -i a.mp3 -framerate 60  -start_number 0000 output.webm


But get the error:

Could find no file with path 'temp%d.png' and index in the range 0-4
temp%d.png: No such file or directory


What must I change please?
temp%d expands to temp0, temp1 ... temp10 ... and so on.

For temp0000, you need temp%04d

and the full command should be

ffmpeg -framerate 60 -i temp%4d.png -i a.mp3 -pix_fmt yuv420p output.webm