从 YouTube 上下载视频，高比特率的 AVC1 和低比特率的 VP9 编码哪个画质更好？ VP9 真的能做到降低一半文件体积吗？ - V2EX
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从 YouTube 上下载视频，高比特率的 AVC1 和低比特率的 VP9 编码哪个画质更好？ VP9 真的能做到降低一半文件体积吗？

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  •   rv54ntjwfm3ug8 Jan 20, 2022 1859 views
    This topic created in 1572 days ago, the information mentioned may be changed or developed.

    测试了下，在 ffmpeg 正常工作的情况下下载同一个视频，不指定画质 youtube-dl 默认下载的是 137 ，yt-dlp 默认下载的是 248

    137 mp4 1920x1080 30 │ ~136.97MiB 4990k dash │ avc1 4990k video only DASH video, mp4_dash 248 webm 1920x1080 30 │ ~ 65.00MiB 2453k dash │ vp9 2453k video only DASH video, webm_dash

    查了下资料，很多人说 VP9 画质略好。VP9 真的能做到降低一半文件体积吗？

  • vp9
  • Dash
  • Video
  • 比特率
    1 replies    2022-01-20 16:09:54 +08:00
    imn1
        1
    imn1  
       Jan 20, 2022
    我个人肉眼喜欢 vp9 ，不过我只是 i5 核显(1920 屏)，从 ytb 下载的基本都是综艺，剧集我优先考虑的是 nf 源

    另外看情况，ytb 我遇到不少只有 720p 的，vp9 比 avc1 体积更大
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