ffmpeg 的网络分割波动很大? - V2EX
peterpei

ffmpeg 的网络分割波动很大?

  •  1
     
  •   peterpei Jan 11, 2022 2772 views
    This topic created in 1586 days ago, the information mentioned may be changed or developed.

    ffmpeg -i 可以添加网络地址输入.
    想要分割一个网络文件,Motrix 和 Idm 下载速度差不多能到 8mb/s
    但是对于 ffmpeg 来说只能 3mb/s 左右
    于是想到可以通过多开 ffmpeg 同时获取不同时间段拼合提升速度
    但是得到的速度相差非常大

    bitrate=10326.3kbits/s speed=2.29x \n bitrate=8299.7kbits/s speed=0.078x \n bitrate=10376.6kbits/s speed=1.13x \n libpostproc 56. 0.100 / 56. 0.100 \n 

    ffmpeg 的 http 协议是可以 Range 的
    请问可能是什么问题呢

    4 replies    2022-01-12 08:22:19 +08:00
    tairan2006
        1
    tairan2006  
       Jan 11, 2022
    你可以先下下来,然后用文件流输入
    crab
        2
    crab  
       Jan 11, 2022
    会不会是根据 cpu 核心数来的
    jim9606
        3
    jim9606  
       Jan 12, 2022
    就算 ffmpeg 可以用 http range ,不代表它能得到合适的时间轴信息啊。指定视频流时间范围下载需要特殊的 Web 服务器扩展。也没有什么靠谱的方法避免 GOP 被切割下载。
    求稳还是全部下载下来再转换吧。
    kidonng
        4
    kidonng  
       Jan 12, 2022 via Android
    为什么要让 ffmpeg 和下载软件比拼,各司其职不好吗
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