#author("2025-04-08T06:23:33+00:00","default:yoya","yoya")
#author("2025-04-08T06:54:18+00:00","default:yoya","yoya")
[[FFmpeg/usage]]
- https://ffmpeg.org/ffmpeg-devices.html#toc-lavfi
* テキスト [#z417cf35]
ffmpeg -f lavfi -i "color=c=blue:s=480x320:r=12,drawtext=text=FOOBAA:fontcolor=yellow:fontsize=(h/4):x=(w-text_w)/2:y=(h-text_h)/2:fontfile=KaiseiDecol-Regular.ttf" -t 10s test.mp4
* 正弦波 [#o7524148]
- https://nico-lab.net/amix_with_ffmpeg/
ffmpeg -f lavfi -i sine=440:0:44100:10 \
-f lavfi -i sine=500:0:44100:10 \
-f lavfi -i sine=700:0:44100:10 \
-filter_complex amix=3 audio.wav
とかで和音作れるのね。便利。φ。。
