Stereo Leathercraft Data

It is first-person video of a person working leather at a bench, recorded with two calibrated cameras, with hand pose and sensor streams alongside. People reach it through several phrasings: leathercraft robot training data, stereo saddle stitching video, egocentric leather tooling dataset, or custom workshop data collection at scale. They describe one request from different angles. Stereo describes the capture, and MCAP describes the container. They are separate choices.

The site does not state that stereo is already running on these rows. The catalog lists a head-mounted phone or a multiview rig as the capture setup, so a stereo pair is a capture choice agreed in the skill spec and confirmed on a Spec Pilot. The data is human capture by paid, consented contributors, not robot or teleoperation data, so using it for a specific robot still needs your own retargeting step. Firsthand is not affiliated with Foxglove or the MCAP maintainers.

Four, listed in lib/commercial-catalog-data.ts under the Leathercraft Workshop environment in the Creative Workshops & Crafts sector, whose examples are leather tooling, hand-stitched goods, saddlery and leather bag or wallet making. "Hand-stitching leather goods" is described as punching stitch holes and saddle-stitching leather pieces with two needles and waxed thread. "Leather bag and wallet making" is described as cutting leather panels, skiving edges, gluing and stitching them into a bag or wallet. "Leather tooling" is described as wetting the leather and stamping and carving patterns into it with tools and a mallet. "Saddlery" is described as cutting, stitching and fitting leather straps and saddle parts with heavy-duty tools.

All four rows are rated Hard and listed as Available on request. The site defines Available on request as work that a spec starts, rather than a running capture stream a spec can join. That is a statement about the catalog row, not a promise of a delivery date. The site states no delivered hours and no delivered stereo footage for any of the four rows, so this page claims none. The first table below reproduces the four rows as the catalog states them.

This page is the stereo and MCAP treatment of the four leathercraft rows. The egocentric leathercraft page covers the same four rows as first-person video with ten streams synced under 2 ms, hand pose, depth and action segments, and stereo is not its subject. It remains the page for the first-person framing and the row-by-row detail.

The stereo garment sewing and fabric cutting page is a different set of rows. It covers Garment sewing, Fabric cutting, Textile mill operation and Finishing and pressing in the Textile & Apparel Production environment, with an industrial sewing machine and shears or a cutting machine on cloth. This page is leather worked by hand at a bench with needles, a mallet and heavy-duty tools. The second table below sets the pages side by side with each status as the site lists it.

The catalog lists "Phone (head-mounted) / multiview rig" for all four rows. The site does not state a stereo pair for any of them. Stereo applies through the site’s general stereo offer: a stereo pair is a capture choice agreed in the skill spec and confirmed on a Spec Pilot. The site does not state capture at a customer’s own workshop, so the setting is agreed in the spec.

The site describes two stereo setups and does not say which one an order for these rows uses. The hard-environments stack is a global-shutter 4K/60 head camera with a 120° lens, two 1080p/60 wrist cameras, a depth sensor at 848×480 and 30 fps, and 200 Hz 6-DoF IMUs. The off-the-shelf stereo head rig, dataset 06, is dual fisheye cameras at 1080p per eye, a 62 mm baseline, per-unit calibration, a 9-axis IMU and hand-tracking output. Camera count, resolution and frame rate for leathercraft are Not stated.

Leatherwork keeps both hands busy on one piece: one hand holds and pulls the leather while the other drives a needle, a stamp or a cutting tool, and the catalog itself names "two needles and waxed thread", "tools and a mallet" and "heavy-duty tools". A stereo pair recovers depth from the calibrated frame pair rather than from a standalone depth sensor, so the geometry sits in the same capture that shows the fingers working.

The site does not state piece sizes, thicknesses or forces, so this page makes no claim about how stiff or heavy the leather is. A stereo pair adds depth, not a verdict. The site lists no leather type, stitch pattern, finished design or quality label for these rows, and none is claimed. The egocentric leathercraft page already supplies the first-person framing; stereo is the addition for a buyer who wants the depth and the MCAP file.

Each row gives a natural cut. Hand-stitching punches the holes and then saddle-stitches through them with two needles and waxed thread. Bag and wallet making runs from cutting panels through skiving edges and gluing to stitching. Tooling wets the leather and then stamps and carves the pattern. Saddlery cuts, stitches and fits straps and saddle parts.

A spec that says "stitch a piece" gives one long action segment. A spec that names punching the holes and then stitching through them gives a sequence you can slice by step. Whether each of those is its own segment, and whether a piece or a whole session is one episode, is a spec decision, not a default. The site does not set an episode length or a piece count. Contact events can mark when a finger or a tool meets the leather, where the spec asks for them.

At a leather bench the piece is held close, and the fingers, the needles or the tool can sit between it and the camera. The site states that the hands occlude the work and that fingers disappear behind objects. That is why each hand joint carries a visibility flag, why contact events mark when the hand or a tool meets the leather, and why instance masks are recorded per frame.

It also states that reach and grasp frames are where blur and occlusion show up, and the head camera in the hard-environments stack is global-shutter, which avoids rolling-shutter skew. How often a needle or a stamp leaves the view at a bench is Not stated. If your policy depends on seeing a stitch pull tight, say so in the spec, ask for wrist views or a multiview angle, and settle it on a Spec Pilot.

Leather types, thicknesses, thread specs, stitch counts, stitch spacing, tool brands and models, strap and part sizes and what a correct fit means are Not stated. So is any dye, finish or chemical used when the leather is wetted, and any success or quality label for a finished seam or pattern. They are set in the written spec, and this page claims none of them.

Edging, burnishing, dyeing and finishing are tasks people often expect here, but the site states none of them as a catalog row, and skiving edges appears only inside the bag and wallet row. A lighting setup for the leathercraft rows is Not stated either. Where a program needs a specific layout, lighting or background, that goes into the spec and is checked on a Spec Pilot. An episode is rejected when more than 35 percent of depth pixels in the manipulation region are invalid, and for this job the spec decides what the manipulation region is at each step.

This page makes no tool, blade, needle, injury, safety, liability or certification claim: all of those are Not stated. The rows name needles, a mallet and heavy-duty tools and no more. The site states no personal protective equipment rule and no workshop-specific bystander rule, so how other people at the bench are handled is settled in the spec.

For every delivered episode the site states that faces, plates and screens are detected and irreversibly blurred at ingest, that a reviewer confirms the result before anything ships, and that footage that cannot be de-identified is discarded. The anonymization record ships with the data, an undocumented bystander is a stated reject criterion, and every episode links to a signed contributor release. This is not legal advice, and the executed agreement controls.

MCAP is an open source container file format for multimodal log data, supporting multiple channels of timestamped pre-serialized data. It is serialization-agnostic, so messages can be Protobuf, DDS (CDR), ROS, JSON and more. Its design is row-oriented and append-only, it stores schemas alongside the data, and it offers an optional index plus optional LZ4 or Zstandard chunk compression.

Reader and writer libraries exist for C++, Go, Python, Rust, Swift and TypeScript, and the mcap CLI can inspect, merge and split files. The foxglove/mcap repository is MIT-licensed; that is the MCAP project licence, not the licence of a Firsthand delivery. The MCAP hub page and the glossary entry cover the format in full.

Firsthand offers MCAP delivery, and dataset 06 is stated as shipping as MCAP. For these rows the site states hand pose, a stereo-derived depth stream with confidence maps, IMU, contact events, action segments, per-frame instance masks and one task instruction per episode elsewhere. What it does not state is which of those are channels in an MCAP file, how they are named, what encoding they use or at what rate.

No topic name, message schema or rate is stated on this page, and none should be assumed. Name the streams that matter in the skill spec and confirm them on a Spec Pilot batch. The fourth table below sets each stream beside what the site states about it.

Hand occlusion by the leather and the tool is the first risk, under the visibility flag above. Two-handed fine motion with small tools and needles is the second, and how often it leaves the frame is Not stated. Calibration is measured at the start and end of every session under a 0.28 px RMS gate, and an episode is rejected for a sync breach beyond the ceiling for more than three consecutive frames, for the manipulated object out of frame for more than 15 percent of the episode, for an undocumented bystander or for a mismatch against the named skill spec.

A reject log ships with every batch, and rejected items are recaptured at the provider’s cost. The fifth table below lists the failure modes beside what the site states.

The October 2026 off-the-shelf catalog lists ~324,800 hours across 18 datasets, of which stereo is ~64,800 hours across 9 datasets. The site names no leathercraft dataset among them, so this work is custom collection, not an off-the-shelf purchase. The off-the-shelf stereo and hand-tracking video can still show the format before you write a spec.

It is custom collection at scale through a network of thousands of capture providers, for a consistent, recurring data flow to labs. Where coverage is deep, the median time from signed spec to first validated batch is a median of 48 hours; where it is thin, turnaround runs three to four weeks. The site does not say which applies to leathercraft, so the timeline is quoted against your spec. Collections are billed per validated hour, and rejected episodes and recaptures are never billed.

Describe the pieces and steps and where each starts and ends: punching holes and saddle stitching, cutting panels and skiving and gluing and stitching a bag or wallet, wetting and stamping and carving a pattern, and cutting and fitting straps and saddle parts. Say whether an episode covers one piece, one step or a whole session, what counts as the object and what counts as a finished step, the privacy rule for the workshop, and name the variation your pipeline is missing. Then name the streams you want in the file, the topic naming and message encoding your reader expects, whether calibration ships inside the file or beside it, and whether MCAP is the only delivery or sits beside RLDS, LeRobot or WebDataset.

Most programs begin with a Spec Pilot, a small first batch that proves the spec and accept criteria on real footage before you scale. The sixth table below shows what each spec element decides.