ffmpeg PNG to mp4 - Black screen

Question

I can create a mpg video using this line

ffmpeg -f image2 -i 100%03d0.png movie.mpg

But If I try creating an mp4 video I get a video with a

Answer 1

Adding -pix_fmt yuv420p should solve the problem:

ffmpeg -i input_%03d.png -pix_fmt yuv420p movie.mp4

From FFmpeg Wiki:

"By default when using libx264, and depending on your input, ffmpeg will attempt to avoid color subsampling. Technically this is preferred, but unfortunately almost all video players, excluding FFmpeg based players, and many online video services only support the YUV color space with 4:2:0 chroma subsampling.

Using the options -pix_fmt yuv420p or -vf format=yuv420p will maximize compatibility."