first commit

2021-10-21 14:57:58 +08:00
parent ba65bf40aa
commit 8184931095
572 changed files with 3165246 additions and 305 deletions
--- a/content/deepin折腾笔记/第六章/6.11.9.md
+++ b/content/deepin折腾笔记/第六章/6.11.9.md
@@ -0,0 +1,4 @@
+# 6.11.9 ffmpeg 调整播放速度
+声音视频同时调节：ffmpeg -i in.mp4 -filter_complex -r 25 "[0:v]setpts=1.25*PTS[v];[0:a]atempo=0.8[a]" -map "[v]" -map "[a]" out.mp4         
+只调节视频：ffmpeg -i in.mp4 -an -filter:v -r 25 "setpts=0.8*PTS" out.mp4               
+只调节音频：ffmpeg -i in.mp3 -filter:a "atempo=1.25" -vn out.mp3