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SRT — Soft-Sub Companion

Companion SRT for the soft-sub MP4 — same SAMPLE cue timings.

File: SRT · Subs
Use case: Subtitle parsingConversion testing· Conversion set

SRT — Speaker Labels and Dialogue Dashes

The conventions captioners actually use — speaker names in caps, leading dashes for alternating dialogue, square brackets and parentheses for sound effects, and music notes around lyrics. None is part of the SubRip grammar, so tools that extract speaker names or strip non-speech cues have to pattern-match them. Useful for testing transcript extraction and caption-cleaning passes.

File: SRT · Captions Edge · 5 cues
Use case: Subtitle parsingVideo QA· Conversion set

SRT — UTF-16 BE with BOM

UTF-16 big-endian with a BOM — the byte order most decoders forget to handle, since little-endian dominates in practice. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — UTF-16 LE with BOM

UTF-16 little-endian with a BOM. Every second byte is NUL, so a parser that reads bytes as UTF-8 or ASCII sees a file that appears to start and end immediately. Tools must detect the BOM, not assume UTF-8. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — UTF-8 with BOM, CRLF

Both awkward properties at once — a BOM and CRLF endings — which is what a file saved by Notepad on Windows actually looks like. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — UTF-8 with BOM, LF

UTF-8 with a leading U+FEFF byte-order mark. Windows caption tools emit this constantly, and a parser that does not strip it sees the BOM as part of the first cue number and fails to match its index. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — UTF-8, CRLF

UTF-8 with Windows CRLF line endings. Parsers that split on a bare \n leave a trailing carriage return on every line, which usually surfaces as a stray box glyph at the end of each caption. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — UTF-8, LF

Plain UTF-8, no byte-order mark, Unix LF line endings. The reference member of this set — every other file here carries the same five cues, so a parser's output can be diffed against this one. Identical cue content across the whole set, so any difference in a parser's output is an encoding bug and nothing else.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — Video QC Note 01

Video QC companion SAMPLE (desync-caption.srt) for Wave G suites.

File: SRT · Notes
Use case: Conversion testingSubtitle parsing

SRT — Video QC Note 03

Video QC companion SAMPLE (bars-caption.srt) for Wave G suites.

File: SRT · Notes
Use case: Conversion testingSubtitle parsing

SRT — Video QC Note 05

Video QC companion SAMPLE (portrait-caption.srt) for Wave G suites.

File: SRT · Notes
Use case: Conversion testingSubtitle parsing

SRT — Video QC Note 07

Video QC companion SAMPLE (square-caption.srt) for Wave G suites.

File: SRT · Notes
Use case: Conversion testingSubtitle parsing

SRT — Windows-1252 (Legacy Code Page)

The same cues in Windows-1252, the legacy code page behind most real-world caption mojibake. Pure ASCII until the curly quotes and em dash, which encode as single bytes 0x93, 0x94 and 0x97 — none of which is valid UTF-8. A tool that assumes UTF-8 either raises or silently substitutes replacement characters exactly where the punctuation was. There is no BOM and no in-band signal, so correct handling requires either charset detection or being told.

File: SRT · Captions Encoding · 5 cues
Use case: Caption encodingSubtitle parsing+1· Conversion set

SRT — Zero and Near-Zero Duration Cues

A cue whose start and end are identical, and one lasting a single millisecond. Both appear in machine-generated captions from forced-alignment tools. A renderer that computes a display duration and divides by it, or that filters out non-positive durations without saying so, mishandles these.

File: SRT · Captions Edge · 3 cues
Use case: Subtitle parsingVideo QA· Conversion set

Stabilisation Ground Truth — detail-chart, Locked Off

The locked-off reference for the detail-chart stabilisation set — any motion in this clip is subject motion, not camera motion. The shaky clips in this group are this footage with a recorded synthetic camera path applied, so residual motion after stabilisation can be measured against zero rather than eyeballed.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Ground Truth — pan-city, Locked Off

The locked-off reference for the pan-city stabilisation set — any motion in this clip is subject motion, not camera motion. The shaky clips in this group are this footage with a recorded synthetic camera path applied, so residual motion after stabilisation can be measured against zero rather than eyeballed.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Ground Truth — text-motion, Locked Off

The locked-off reference for the text-motion stabilisation set — any motion in this clip is subject motion, not camera motion. The shaky clips in this group are this footage with a recorded synthetic camera path applied, so residual motion after stabilisation can be measured against zero rather than eyeballed.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — detail-chart, Heavy handheld

Heavy handheld camera shake applied to the locked-off detail-chart plate: up to 12.0 px of translation at 6.5 Hz, seed 5131. Twelve-pixel excursions at a slower, larger cadence: running, or a long lens. Requires real trajectory smoothing rather than frame-to-frame alignment. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — detail-chart, High-frequency jitter

High-frequency jitter camera shake applied to the locked-off detail-chart plate: up to 2.5 px of translation and 0.5° of roll at 23.0 Hz, seed 5193. Small, fast jitter near the frame rate — vibration from a vehicle or a drone motor. Aliases against the sampling rate, so naive low-pass smoothing of the path leaves it almost untouched. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — detail-chart, Light handheld

Light handheld camera shake applied to the locked-off detail-chart plate: up to 3.0 px of translation at 11.0 Hz, seed 5100. Sub-pixel-to-3-pixel translation at walking cadence — the residual wobble left after in-body stabilisation. Easy to correct, and the case where over-correction visibly crops the frame for nothing. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — detail-chart, Rotational roll

Rotational roll camera shake applied to the locked-off detail-chart plate: up to 4.0 px of translation and 1.6° of roll at 8.0 Hz, seed 5162. Translation plus up to 1.6° of roll. Translation-only stabilisers cannot fix roll at all, so this immediately separates 2-DOF from full-affine implementations. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — pan-city, Heavy handheld

Heavy handheld camera shake applied to the locked-off pan-city plate: up to 12.0 px of translation at 6.5 Hz, seed 5131. Twelve-pixel excursions at a slower, larger cadence: running, or a long lens. Requires real trajectory smoothing rather than frame-to-frame alignment. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — pan-city, High-frequency jitter

High-frequency jitter camera shake applied to the locked-off pan-city plate: up to 2.5 px of translation and 0.5° of roll at 23.0 Hz, seed 5193. Small, fast jitter near the frame rate — vibration from a vehicle or a drone motor. Aliases against the sampling rate, so naive low-pass smoothing of the path leaves it almost untouched. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

Stabilisation Input — pan-city, Light handheld

Light handheld camera shake applied to the locked-off pan-city plate: up to 3.0 px of translation at 11.0 Hz, seed 5100. Sub-pixel-to-3-pixel translation at walking cadence — the residual wobble left after in-body stabilisation. Easy to correct, and the case where over-correction visibly crops the frame for nothing. Uncovered edges are filled black rather than padded, so the crop a stabiliser needs is visible in the input.

File: MP4 · Stab · 640x360
Use case: Video stabilisationVideo QA· Conversion set

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