Creating video from images produces black screen video for certain image formats [duplicate]

问题

This question already has answers here:

FFMPEG x264 MP4 Encoding all grey (1 answer)

FFmpeg converting image sequence to video results in blank video [closed] (1 answer)

Closed 2 years ago.

I am using below command to create video from images.The command works fine for most images but for png images the video created cannot be played and I just get a black screen.

 String[]  command = new String[]{"-y", "-f", "concat", "-safe", "0", "-i", src.getAbsolutePath(), "-vsync", "vfr", "-vf", "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2", dest.getAbsolutePath()};

Here destination file path has mp4 format.. Whats wrong with my command?

回答1:

Add format=yuv420p. When given RGB input and output as MP4, ffmpeg chooses a pixel format not compatible with a lot of players.

Use

 String[]  command = new String[]{"-y", "-f", "concat", "-safe", "0", "-i", src.getAbsolutePath(), "-vsync", "vfr", "-vf", "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,format=yuv420p", dest.getAbsolutePath()};

来源：https://stackoverflow.com/questions/50597344/creating-video-from-images-produces-black-screen-video-for-certain-image-formats