Twitch VOD Chapter DownloaderExport game-change timestamps as a ready-to-use chapter list

When you analyse a past broadcast, vodfetch asks Twitch for that video's moments of type VIDEO_CHAPTER_MARKERS — the game and category segments Twitch records during a stream — and reads two fields from each one: description, the category label, and positionMilliseconds, the marker's offset from the start of the recording. The Chapters (.txt) button then writes one line per marker to <vod-id>_chapters.txt. Positions are rounded to whole seconds and written as mm:ss for anything in the first hour and h:mm:ss after that, so a marker at two minutes five seconds reads [02:05] and one just past the hour reads [1:02:03]. Where a marker carries no description, the line falls back to an em dash.

The button sits in the Options panel below the Download button, and it only appears for past broadcasts that actually have at least one marker. Exporting is independent of downloading video: the list comes from metadata already fetched during Analyze, so you can save a multi-hour stream's outline without pulling a single video segment, and the quality you have selected makes no difference to it.

Those timestamps are directly reusable in the trim controls, which live in the same Options panel: tick Trim, then fill the From and To boxes. They accept h:mm:ss, m:ss or a plain number of seconds, so one marker's time goes in From and the next marker's time in To. The readout beside them confirms start, end and resulting length, and the size estimate next to the quality picker recomputes from that duration and the selected rendition's bandwidth. Cutting a forty-minute category segment out of an eight-hour broadcast transfers roughly forty minutes of video rather than the whole stream.

Two things stop this from being frame-exact. The download works in whole HLS segments, and every segment that overlaps your range is fetched entire, so the saved file can start a few seconds before the From time and run a few seconds past the To time. And a marker records the moment the category was changed on the channel, which is not necessarily the second the new content began. Leave a small margin at both ends rather than trusting a marker to the second.

If you are working through a list of markers, vodfetch's own address takes parameters. Open the page as ?url=<vod link>&t=1h02m03s and it fills the input box, switches trimming on, sets From to that time and To one minute later, capped at the end of the video; widen To for a longer cut. The t value understands Twitch's 1h02m03s notation or a plain number of seconds, and it is applied only when it falls inside the video's duration. Note that this is a parameter on the vodfetch URL — a t value sitting inside a Twitch link you paste into the box is ignored. Add &go=1 to start the analysis automatically. Where Twitch supplies a storyboard for the VOD, hovering or dragging on the scrub bar shows its preview thumbnails, so you can check a cut point visually first.

Chapters are also worth exporting before you need them. Twitch deletes past broadcasts after 7 days, or 14 for Affiliates, and 60 for Partners and Prime/Turbo channels, and the marker list disappears with the video.