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                            [TOC]

# 裁剪
~~~
ffmpeg -i out.mp4 -ss 00:00:00 -t 10 out1.mp4
~~~
?   `-ss` 指定裁剪的開始時間，精確到秒,時:分:秒
?   `-t` 被裁剪后的時長,單位為秒

# 合并
首先創建一個 inputs.txt 文件，文件內容如下：
~~~
file '1.flv'
file '2.flv'
file '3.flv'
~~~
然后執行下面的命令：
~~~
ffmpeg -f concat -i inputs.txt -c copy output.flv
~~~


# hls切片
~~~
ffmpeg -i out.mp4 -c:v libx264 -c:a libfdk_aac -strict -2 -f hls  out.m3u8
~~~
?   `-strict -2` 指明音頻使有AAC。
?   `-f hls` 轉成 m3u8 格式。
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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