update for rename of recentchanges.mdwn to json.tl.ph.mdwn

[git.ikiwiki.info.git] / doc / todo / fancypodcast.mdwn

diff --git a/doc/todo/fancypodcast.mdwn b/doc/todo/fancypodcast.mdwn
index 64af7e8a9aa12a511fffac3862e0ca08e3ee78f8..fe75f58cbbbad0c519f542c7228570f062012d16 100644 (file)
--- a/doc/todo/fancypodcast.mdwn
+++ b/doc/todo/fancypodcast.mdwn
@@ -1,22 +1,9 @@
-ikiwiki's simple podcasting, while elegant and minimal, doesn't (as
-mentioned in [[todo/blogging]]) produce full-featured feeds. In
-fancy podcasts, episodes are accompanied by text content. The feeds
-also have lots more metadata.
-
-[[!toc]]
-

 ## Status
 
 [[!template id=gitbranch branch=schmonz/fancypodcast author="[[schmonz]]"]]
 [[!tag patch]]
 
 ## Status
 
 [[!template id=gitbranch branch=schmonz/fancypodcast author="[[schmonz]]"]]
 [[!tag patch]]
 

-In summary, the branch preserves ikiwiki's existing podcast behavior,
-adds more featureful behavior, and has been tested to work well in
-some common podcatchers. I believe it is ready for review and
-possible integration, and I'd like to get feedback to that effect
-(or to the contrary) before making further enhancements. I know
-[[joey]]'s the final arbiter here, but I'd appreciate any qualified,
-critical eyes ([[smcv]]?) raking over my diffs. --[[schmonz]]
+Nothing new since 2013/07/21 [[merge|done]] to `master`.

 
 ## Features
 
 
 ## Features
 


@@ -37,157 +24,30 @@ Episode description|(./)      |(./)       |(./)        |
 Episode enclosure  |(./)      |(./)       |(./)        |(./)
 """]]
 
 Episode enclosure  |(./)      |(./)       |(./)        |(./)
 """]]
 

-## Design
-
-7. For each fancy podcast episode, write a blog post containing
-   `\[[!meta enclosure="WikiLink/to/media.mp3"]]`. (Don't specify
-   more than one enclosure -- but if you do, last one wins.)
-7. When rendering to HTML (single-page or inlined), append a link
-   to the media file.
-7. When rendering to RSS/Atom, the text is the entry's content and
-   the media file is its enclosure.
-7. Don't break simple podcasts in pursuit of fancy podcasts.
-
-## Implementation
-
-### Completed
-
-* Cover the existing simple podcast behavior with tests.
-* Add an `enclosure` field to [[plugins/meta]] that expands the
-  given [[ikiwiki/WikiLink]] to an absolute URL (feed enclosures
-  pretty much need to be, and the reference feeds I've looked at
-  all do this).
-* Write failing tests for the desired single-page and inlined
-  HTML behavior, then make them pass by adding enclosure stanzas
-  to `{,inline}page.tmpl`.
-* Write failing tests for the desired RSS/Atom behavior, then make
-  them pass via changes to `{atom,rss}item.tmpl` and [[plugins/inline]].
-* Match feature-for-feature with
-  [tru_podcast](http://www.rainskit.com/blog/542/tru_podcast-a-podcasting-plugin-for-textpattern)
-  (what [[schmonz]] will be migrating from).
-* Enrich [feed metadata](http://cyber.law.harvard.edu/rss/rss.html)
-  by catching up `rsspage.tmpl` to `atompage.tmpl`.
-* Verify that [[plugins/more]] plays well with fancy podcasts.
-* Verify that the feeds validate.
-* Subscribe to a fancy feed in some common podcatchers and verify
-  display details against a reference podcast.
-* Verify smooth transitions for two common use cases (see testing
-  details below).
-
-### Must-have (for [[schmonz]], anyway)
-
-* Think carefully about UTF-8.
-* Verify that _all_ the tests pass (not just my new ones).
-
-## Migration
-
-### Upgrading within ikiwiki: from simple to fancy
-
-#### My test podcast
-
-For this test, I chose a podcast that tries to work around ikiwiki's
-current limitations by issuing two separate `inline`s:
-
-* One with `feedonly=yes` that includes `.mdwn`, `.pdf`, and `.mp3`
-* One with `feeds=no` that includes only `.mdwn` (and makes a trail)
-
-This has the following effects:
-
-* Browser: sees just the articles (each of which has a manually
-  created link to its corresponding media file)
-* Feedreader: sees all the articles and media in one flat stream
-* Podcatcher: sees just the media (sans articles)
-
-I want instead to write one `inline` with these effects:
-
-* Browser: sees just the articles (each of which automatically links
-  to its enclosure)
-* Feedreader: sees just the articles (each of which specifies its
-  enclosure)
-* Podcatcher: sees just the enclosures (each of which has an enclosing
-  article, rendered as the media's "description")
-
-#### Upgrade steps
-
-7. Set up a non-production copy of the podcast.
-    7. Visually diff RSS and Atom feeds against production.
-    7. Subscribe to the copy (both feeds) in `r2e`, iTunes, Downcast.
-7. Apply fancypodcast patch to the installed ikiwiki:
-    7. `cd ~/Documents/trees/ikiwiki && git checkout fancypodcast`
-    7. `git diff --no-prefix master > ~/Documents/trees/localpatches/www/ikiwiki/fancypodcast.diff`
-    7. `cd ~/Documents/trees/pkgsrc-current/www/ikiwiki && make deinstall && make install clean`
-7. Verify that simple podcasts are unaffected:
-    7. Rerun `ikiwiki --setup`.
-    7. `diff -uB simple-before.rss simple-after.rss`
-        * A few new elements and attributes, as expected.
-    7. `diff -uB simple-before.atom simple-after.atom`
-        * No change.
-7. Remove the feed-only `inline` and enable feeds on the remaining one.
-7. Convert articles' manual download links to `\[[!meta enclosure=""]]`.
-7. I want existing and future podcatchers to get my new fancy
-   episodes, and I know my podcast isn't in any planets, so I'm
-   going to skip [[tips/howto avoid flooding aggregators]].
-7. Rerun `ikiwiki --setup`.
-7. Verify browser shows the same stuff.
-7. `diff -uB simple-after.rss fancy-after.rss   # and atom`
-    * MP3s and PDFs are no longer naked enclosures, but belong to
-      articles as they should.
-    * Articles have updated modification times, as they should.
-7. `r2e run` (both RSS and Atom)
-    * Nothing new with the default `trust-guid = True` (otherwise
-      would expect updated articles).
-7. iTunes "Update Podcast" (both RSS and Atom)
-    * Added one episode per article, with article text as the episode
-      description.
-    * Kept old naked-enclosure episodes around.
-7. Downcast refresh (RSS):
-    * Added one episode per article, with article text as the episode
-      description.
-    * Kept old naked-enclosure episodes around.
-7. Downcast refresh (Atom):
-    * Added one episode per article, with no episode description
-      (expected, see feature table).
-    * Kept old naked-enclosure episodes around.
-
-Different tradeoffs are possible. These seem okay to me.
-
-### Importing into ikiwiki: fancy (from another CMS)
-
-#### My test podcast
-
-For this test, I chose a podcast currently being published with
-Textpattern and tru_podcast, because I'd strongly prefer to publish
-it with ikiwiki instead.
-
-#### Upgrade steps
+## Future improvements

 
 

-7. Set up a non-production copy of the podcast.
-    7. Visually diff RSS and Atom feeds against production.
-    7. Subscribe to the copy (both feeds) in `r2e`, iTunes, Downcast.
-7. With a fancypodcast-enabled ikiwiki installed:
-    7. Copy content from Textpattern to ikiwiki:
-        7. Match article paths to preserve `/YYYY/MM/DD/post-title` permalinks.
-        7. Match enclosure paths (or redirect) to preserve Textpattern's URLs.
-        7. Match titles, post dates, and guids with `\[[!meta]]`.
-           7. Match feed paths with permanent redirects from `/atom/` to
-           `/index.atom` (and same for RSS).
-        7. `\[[!inline]]` the articles.
-    7. Rerun `ikiwiki --setup`.
-7. Stop Textpattern, start ikiwiki.
-7. Verify that podcatchers see the feeds and don't redownload anything.
-7. Naively add two new blog posts, one with an enclosure.
-7. Verify that podcatchers download the new enclosures.
+### Embedded audio/video player in browsers

 
 

------
-
-## Future improvements
+* For a given enclosure, depending on autodetected MIME:
+    * `audio/*` -> `<audio>`
+    * `video/*` -> `<video>`
+* For a given template:
+    * `page.tmpl` -> eagerly fetch media
+    * `inlinepage.tmpl` -> fetch just enough to display durations
+* Only for HTML5 sites, or also okay for XHTML?
+* Does this work well enough in enough browsers, or do we need a
+  JavaScript player to fill in some gaps?

 
 ### iTunes fancy podcasting
 
 * [iTunes-specific tags](https://www.apple.com/itunes/podcasts/specs.html)
   appear to be RSS-only
 
 ### iTunes fancy podcasting
 
 * [iTunes-specific tags](https://www.apple.com/itunes/podcasts/specs.html)
   appear to be RSS-only

-    * If they work in Atom, teach `inline` to optionally iTunesify RSS/Atom.
-    * Else, add `itunes` as a third kind of feed (RSS plus more stuff).
+    * Can we always include them in RSS feeds, or would that break
+      some feed readers?
+    * Is it even valid to include them in Atom feeds? If so, do
+      Atom podcasts look any better in podcatchers?
+    * Avoid adding a third kind of feed (`itunesrss`), or options
+      to the existing `rss` and `atom` feeds, unless we have to.

 * Notable tags for feeds:
     * `itunes:subtitle`
     * `itunes:author`
 * Notable tags for feeds:
     * `itunes:subtitle`
     * `itunes:author`


@@ -203,6 +63,9 @@ it with ikiwiki instead.
         * [ffprobe](http://ffmpeg.org/ffprobe.html) is reasonably fast
         * [mediainfo](http://mediainfo.sourceforge.net/) is way slower
         * Cache computed durations as pagestate
         * [ffprobe](http://ffmpeg.org/ffprobe.html) is reasonably fast
         * [mediainfo](http://mediainfo.sourceforge.net/) is way slower
         * Cache computed durations as pagestate

+* [Podcast Feed Best
+  Practice](https://github.com/gpodder/podcast-feed-best-practice/blob/master/podcast-feed-best-practice.md)
+  from the gPodder folks

 
 ### Fancy podcast aggregating
 
 
 ### Fancy podcast aggregating
 


@@ -212,8 +75,6 @@ it with ikiwiki instead.
 
 ### Other ideas
 
 
 ### Other ideas
 

-* Don't render template text (e.g., "Use this template to insert a
-  note into a page") in feeds.

 * Optionally specify the enclosure's:
     * MIME type, in case `File::MimeInfo` guesses wrong.
     * Duration, in case `ffprobe` guesses wrong.
 * Optionally specify the enclosure's:
     * MIME type, in case `File::MimeInfo` guesses wrong.
     * Duration, in case `ffprobe` guesses wrong.


@@ -225,106 +86,3 @@ it with ikiwiki instead.
 * Configurably generate additional subscription links (such as
   iTunes) alongside the RSS/Atom ones in [[plugins/inline]].
 * Support Apple's "enhanced podcasts" (if they're still relevant).
 * Configurably generate additional subscription links (such as
   iTunes) alongside the RSS/Atom ones in [[plugins/inline]].
 * Support Apple's "enhanced podcasts" (if they're still relevant).

-
-### code review
-
-       +                               # XXX better way to compute relative to srcdir?
-       +                               my $file = $absurl;
-       +                               $file =~ s|^$config{url}/||;
-
-I don't think ikiwiki offers a better way to do that, because there is
-normally no reason to do that. Why does it need an url of this form here?
---[[Joey]] 
-
-> In all the popular, production-quality podcast feeds I've looked
-> at, enclosure URLs are always absolute (even when they could be
-> expressed concisely as relative). [Apple's
-> example](http://www.apple.com/itunes/podcasts/specs.html#example)
-> does too. So I told \[[!meta]] to call `urlto()` with the third
-> parameter true, which means the \[[!inline]] code here gets an
-> absolute URL in `$pagestate{$p}{meta}{enclosure}`. To compute the
-> enclosure's metadata, though, we of course need it as a local path.
-> I didn't see a less
-> [ongepotchket](http://www.jewish-languages.org/jewish-english-lexicon/words/1402)
-> way at the time. If you have a better idea, I'm happy to hear it;
-> if not, I'll add an explanatory comment. --[[schmonz]]
-
->> I would be more comfortable with this if two two different forms of url
->> you need were both generated by calling urlto. It'd be fine to call
->> it more than once. --[[Joey]]
-
->>> Heh, it was even easier than that! (Hooray for tests.) Done.
->>> --[[schmonz]]
-
-       +<TMPL_IF HTML5><section id="inlineenclosure"><TMPL_ELSE><div id="inlineenclosure"></TMPL_IF>
-       +<TMPL_IF ENCLOSURE>
-
-Can't we avoid adding this div when there's no enclosure? --[[Joey]]
-
-> Sure, I've moved the `<TMPL_IF ENCLOSURE>` check to outside the
-> section-and-div block for `{,inline}page.tmpl`. --[[schmonz]]
-
-       +<a href="<TMPL_VAR ENCLOSURE>">Download this episode</a>
-
-"Download this episode" is pretty specific to particular use cases.
-Can this be made more generic, perhaps just "Download"? --[[Joey]] 
-
-> Yep, I got a little carried away. Done. --[[schmonz]]
-
-       -<TMPL_IF AUTHOR>
-       -       <title><TMPL_VAR AUTHOR ESCAPE=HTML>: <TMPL_VAR TITLE></title>
-       -       <dcterms:creator><TMPL_VAR AUTHOR ESCAPE=HTML></dcterms:creator>
-
-This change removes the author name from the title of the rss feed, which
-does not seem necessary for fancy podcasts. And it is a change that
-could negatively impact eg, Planet style aggregators using ikiwiki. --[[Joey]]
-
-> While comparing how feeds render in podcatchers, I noticed that
-> RSS and Atom were inconsistent in a couple ways, of which this was
-> one. The way I noticed it: with RSS, valuable title space was being
-> spent to display the author. I figured Atom's display was the one
-> worth matching. You're right, of course, that planets using the
-> default template and somehow relying on the current author-in-the-title
-> rendering for RSS feeds (but not Atom feeds!) would be broken by
-> this change. I'm having trouble imagining exactly what would break,
-> though, since guids and timestamps are unaffected. Would it suffice
-> to provide a note in the changelog warning people to be careful
-> upgrading their planets, and to customize `rssitem.tmpl` if they
-> really prefer the old behavior (or don't want to take any chances)?
-> --[[schmonz]]
-
->> A specific example I know of is updo.debian.net, when used with
->> rss2email. Without the author name there, one cannot see who posted
->> an item. It's worth noting that planet.debian.org does the same thing
->> with its rss feed. (That's probably what I copied.) Atom feeds may
->> not have this problem, don't know. --[[Joey]]
-
->>> Okay, that's easy to reproduce. It looks like this _might_ be
->>> a simple matter of getting \[[!aggregate]] to populate author in
->>> `add_page()`. I'll see what I can figure out. --[[schmonz]]
-
-       +++ b/templates/rsspage.tmpl
-       +       xmlns:atom="http://www.w3.org/2005/Atom"
-       +<atom:link href="<TMPL_VAR FEEDURL>" rel="self" type="application/rss+xml" />
-
-Why is it using atom namespace inside an rss feed? What are the chances
-every crummy rss reader on earth is going to understand this? I'd put it at
-about 0%; I doubt ikiwiki's own rss reader understands such a mashup.
---[[Joey]]
-
-> The validator I used (<http://validator.w3.org/>, I think) told me to.
-> Pretty sure it doesn't make anything work better in the podcatchers
-> I tried. Hadn't considered that it might break some readers.
-> Removed. --[[schmonz]]
-
-       +<generator>ikiwiki</generator>
-
-Does this added tag provide any benefits? --[[Joey]]
-
-> Consistency with the Atom feed, and of course it trumpets ikiwiki
-> to software and/or curious humans who inspect their feeds. The tag
-> arrived only in RSS 2.0, but that's already the version we're
-> claiming to be, and it's over a decade old. Seems much less risky
-> than the atom namespace bits. --[[schmonz]]
-
->> Sounds ok then. --[[Joey]]