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Enclosure

An enclosure is the <enclosure> element inside an RSS item that points at the episode's audio file — the single tag that turns a feed into a podcast.

Why it matters

Everything else in podcasting is metadata around this one URL. Because the audio is addressed directly, hosting is a commodity: move the files, update the feed, and every subscriber follows without asking permission from anyone.

It is also why podcast statistics are what they are. A download is an HTTP request for this URL, which is why the industry measures requests rather than listening, and why nobody can tell you whether anyone finished the episode.

How it works

The element carries three attributes: url for the file, length in bytes, and type as a mime type such as audio/mpeg. One enclosure per item.

Later Podcast Namespace tags lean on it rather than replacing it — soundbites mark a span inside the enclosure's audio, and chapters annotate the same file from outside.

Heard on the show

11 moments across 11 episodes.

  1. E141 · 14 Jul 2023 · Boosting is Loving

    • 1:15:30When you had the idea for the enclosure…chapter

  2. E86 · 20 May 2022 · Stackin' Salad Dressing

    • Alternate Enclosureshow notes

  3. E77 · 11 Mar 2022 · Is that a minipub in your pocket?

    • 1:15:41How many apps support alternate enclosure?chapter

  4. E42 · 18 Jun 2021 · All a Flutter

    • Alternate enclosureshow notes

  5. E22 · 29 Jan 2021 · This Train is Rolling

    • IPFS won't go away alternate enclosureshow notes

  6. E246 · 2 Jan 2026 · Crap Trap

    • 6:51HLS video, alternate enclosures, which is all fine.transcript

  7. E184 · 28 Jun 2024 · Donor Bone

    • 1:41:10ultimate enclosure is great. And I can imagine scenarios and usetranscript

  8. E157 · 1 Dec 2023 · BEP5

    • 51:21embedded HTML code, is that wrong? As an enclosure on atranscript

  9. E153 · 3 Nov 2023 · Chapter HO

    • 1:20:15alternate feed alternate enclosure. I'mtranscript

and 2 more episodes, back to E21 (22 Jan 2021).

Show all 11 moments across 11 episodes

  1. E246 · 2 Jan 2026 · Crap Trap

    • 6:51HLS video, alternate enclosures, which is all fine.transcript

  2. E184 · 28 Jun 2024 · Donor Bone

    • 1:41:10ultimate enclosure is great. And I can imagine scenarios and usetranscript

  3. E157 · 1 Dec 2023 · BEP5

    • 51:21embedded HTML code, is that wrong? As an enclosure on atranscript

  4. E153 · 3 Nov 2023 · Chapter HO

    • 1:20:15alternate feed alternate enclosure. I'mtranscript

  5. E141 · 14 Jul 2023 · Boosting is Loving

    • 1:15:30When you had the idea for the enclosure…chapter

  6. E137 · 16 Jun 2023 · Wonk Factor

    • 39:19the enclosure first before I can get it out of IPFS podcasting astranscript

  7. E86 · 20 May 2022 · Stackin' Salad Dressing

    • Alternate Enclosureshow notes

  8. E77 · 11 Mar 2022 · Is that a minipub in your pocket?

    • 1:15:41How many apps support alternate enclosure?chapter

  9. E42 · 18 Jun 2021 · All a Flutter

    • Alternate enclosureshow notes

  10. E22 · 29 Jan 2021 · This Train is Rolling

    • IPFS won't go away alternate enclosureshow notes

  11. E21 · 22 Jan 2021 · Hooray for Hollywood

    • 39:35How do we handle the concept of multiple enclosures? If I Yeah,transcript

From chapter titles, show notes, the PC 2.0 Timeline and the clip notes. Where those say nothing, from the episode transcript — which reaches further but only records that a word was said. 214 of 266 episodes have curated notes; 177 moments come from transcripts.