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1秒の無音の音楽ファイル作成・1秒の動画を1枚の静止画から作成

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1秒の無音の音楽ファイルを生成

ffmpeg -ar 48000 -t 00:00:01 -f s16le -acodec pcm_s16le -ac 2 -i /dev/zero -acodec libmp3lame -aq 4 silent.mp3

です。

-t xx:xx:xx -f 

の部分が秒数指定です

silent.mp3のファイル名は任意で

1秒の動画を1枚の静止画から作成

ffmpeg -loop 1 -i image.png  -i ~/silent.mp3 -c:v h264 -c:a mp2 -t 00:00:01 -vf scale=640:640 -y -pix_fmt yuv420p -r 29.98 movie.mp4

image.png: 動画にしたい静止画
silent.mp3: BGMにしたい音楽ファイル(今回はさっき作った無音mp3)
movie.mp4: 生成する動画のファイル名
00:00:01: 動画の秒数

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