52 lines
2.7 KiB
Markdown
52 lines
2.7 KiB
Markdown
quvi does not seem maintained (last upstream release in 2013)
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and it supports many fewer videos than youtube-dl does.
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The difficulty with using youtube-dl is it, by design, does not
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provide a way to probe if it supports an url, other than running it
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and seeing if it finds a video at the url. This would make `git annex
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addurl` significantly slower if it ran youtube-dl to probe every url.
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It is possible to use youtube-dl to download arbitrary non-video files;
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it stores the file to disk just as wget or curl. But, that's well outside
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its intended use case, and so it does not feel like a good idea to make
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git-annex depend on using youtube-dl to download generic urls.
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(Also, youtube-dl has bugs with downloading non-video
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urls, see for example http://bugs.debian.org/874321)
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So, switching to youtube-dl would probably need a new switch, like `git
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annex addurl --rip` that enables using it.
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Currently `git annex importfeed` automatically tests for video urls with
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quvi; it would also need to support `--rip`.
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Both of those changes would need changes to user's workflows and cron jobs.
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git-annex could keep supporting quvi for some time, and warn when it uses
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quvi, to help with the transition.
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> Alternatively, git-annex addurl could download the url first, and then
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> check the file to see if it looks like html. If so, run youtube-dl (which
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> unfortunately has to download it again) and see if it manages to rip
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> media from it. This way, addurl of non-html files does not have extra
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> overhead, and the redundant download is fairly small compared to ripping
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> the media. Only the unusual case where addurl is being used on html that
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> does not contain media becomes more expensive.
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Another gotcha is playlists. youtube-dl downloads playlists automatically.
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But, git-annex needs to record an url that downloads a single file so that
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`git annex get` works right. So, playlists will need to be disabled when
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git-annex runs youtube-dl. But, `--no-playlist` does not always disable
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playlists. Best option seems to be `--playlist-items 0` which works for
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non-playlists, and downloads only 1 item from playlists (hopefully a fairly
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stable item, but who knows..).
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(`git annex importfeed` handles youtube playlist downloads, but needs the
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user to find the url to the rss feed for the playlist. Youtube still has
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these, although it makes them hard to find.)
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Another gotcha is that youtube-dl's -o option does not fully determine the
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filename it downloads to. Sometims it will tack on an additional extension
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(seen with youtube videos where it added a ".mkv").
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And --get-filename does not report the actual filename when that happens.
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This seems to be due to format merging by ffmpeg; with -f best, it does
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not merge and so does not do that.
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<https://github.com/rg3/youtube-dl/issues/14864>
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