https://www.daiphys.com/portal/ 2026-04-30T21:11:36+00:00 https://www.daiphys.com/portal/ https://www.daiphys.com/portal/_media/wiki/dokuwiki.svg text/html 2024-11-01T06:11:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.daiphys.com/portal/video/ffmpeg.html?rev=1730441486&do=diff FFmpeg Sample ## Convert mp4 to webm ffmpeg -i input.mp4 output.webm ## Convert gif to mp4 ffmpeg -i input.gif -movflags faststart -pix_fmt yuv420p output.mp4 ## 指定時間でカット ffmpeg -i input.mp4 -t 10.0 -c copy output.mp4 ffmpeg -i input.mp4 -ss 00:01:00 -to 00:02:00 -c copy output.mp4 ## 入力FPSを変更 = 再生時間が変わる ffmpeg -r 30 -i input.gif -movflags faststart -pix_fmt yuv420p output.mp4 ## 出力FPSを変更 = 再生時間は変わらない ffmpeg -i input.gif -movflags faststart -pix_fmt yuv420p -r 30 output.mp4… text/html 2023-04-14T00:30:50+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.daiphys.com/portal/video/index.html?rev=1681432250&do=diff Video Editing * FFmpeg * VLC text/html 2024-11-01T06:16:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.daiphys.com/portal/video/vlc.html?rev=1730441801&do=diff VLC References <https://www.videolan.org/> <https://www.videolan.org/vlc/>