[15:11] hi [15:11] just wondering if anyone can help me with ffmpeg problem? [15:12] trying to convert about 400 png files (1.png, 2.png etc..) to a mpeg video. [15:13] ffmpeg -framerate 1/5 -i %d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 [15:13] Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height [15:13] What am I doing wrong?