ffmpeg -i kakou.avi test/demo-%06d.jpeg
ffmpeg -i demo/%06d.jpeg -vf scale=420:-2, format=yuv420p demo.mp4
ffmpeg -i res/%06d.bmp -vf scale=1080:-2,format=yuv420p yz_10.mp4(高清)
ffmpeg -y -threads 4 -i input.mp4 -vcodec libx264 output.ts
ffmpeg -y -threads 4 -i first.mp4 -r 24 -vf settb=1/24,setdar=16:9 -vcodec libx264 first.ts
ffmpeg -y -threads 12 -stream_loop 0 -i input.mp4 -vf scale=1600x900 -vcodec libx264 output.ts
ffmpeg -y -threads 12 -stream_loop 0 -i input.mp4 -vcodec libx264 output.ts