我有youtube dl视频质量问题。我试过了，youtube-dl但odysee问题是视频只有一种格式，使用最佳格式选项时我无法将视频质量改为最低...我尝试在互联网上搜索解决方案，但一无所获。我试过使用选项max-file大小，但也没有用。它告诉我文件大于我要求的大小（文件大于最大文件大小）。
所以我在想，是否可以正常下载视频，然后将视频转换为较低质量？因为我已经看到，您显然可以将格式从 mp4 更改为 avi，但是否可以下载视频，然后自动将其从 mp4 1080p 转换为 mp4 480p？这样它占用的硬盘空间就更少了。
答案1
youtube-dl不再受支持，其最新版本来自17 December 2021。
一个很好的选择是一个名为yt-dlp。
以下是一些可能对您有用的选项：
# Download the best video available but no better than 480p,
# or the worst video if there is no video under 480p
$ yt-dlp -f "bv*[height<=480]+ba/b[height<=480] / wv*+ba/w"
# Download the best video available with the largest height but no better than 480p,
# or the best video with the smallest resolution if there is no video under 480p
$ yt-dlp -S "height:480"
# Download the best video available with the largest resolution but no better than 480p,
# or the best video with the smallest resolution if there is no video under 480p
# Resolution is determined by using the smallest dimension.
# So this works correctly for vertical videos as well
$ yt-dlp -S "res:480"
# Download the best video (that also has audio) but no bigger than 50 MB,
# or the worst video (that also has audio) if there is no video under 50 MB
$ yt-dlp -f "b[filesize<50M] / w"
# Download largest video (that also has audio) but no bigger than 50 MB,
# or the smallest video (that also has audio) if there is no video under 50 MB
$ yt-dlp -f "b" -S "filesize:50M"
# Download best video (that also has audio) that is closest in size to 50 MB
$ yt-dlp -f "b" -S "filesize~50M"
如果问题在于源中只有高质量视频，则下载后必须进行一些转换。您还可以检查这个问题：如何使用 ffmpeg 减小视频尺寸？