Guides and insights for captioning professionals

Where to put a caption and what survives export: safe areas, grid versus pixel positioning, what each format can store, and why nothing validates placement.

Nine engines, one blended price. Which machine translation provider to pick for subtitles, what each one does to your italics, and why ModernMT is going away.

Netflix uses brackets, DCMP uses parentheses, broadcast uses chevrons and UK subtitling uses colour. The four speaker ID conventions side by side, and where they contradict.

Brightcove, Mux, Bunny Stream, Cloudflare Stream, YouTube and iconik each ask for a different credential. What every destination needs, and which carry audio description.

Half a second either side of a cut is a no-go band. The frame thresholds, the two-frame gap, chaining, and what the eye-tracking research actually found.

Streaming cuts your subtitle file into pieces. What X-TIMESTAMP-MAP does, why a ten second offset is so common, and which faults belong to packaging.

Drop frame skips numbers, not pictures. Why 29.97 and 23.976 both drift 3.6 seconds an hour, and how the size of the error tells you the cause.

How DFXP, SMPTE-TT, EBU-TT-D, and IMSC relate to TTML, why the media time base matters, and what actually fails a streaming delivery.

What the hex byte pairs mean, why odd parity breaks hand-edited files, how the 32 by 15 grid limits placement, and why SCC is 29.97 fps only.

How the GSI and TTI blocks are built, what the Display Standard Code decides, how OP-42 and OP-47 carry teletext, and why control codes change your line length.

Characters per second versus words per minute, the published platform limits, why broadcast has a hard ceiling, and how to fix events that run too fast.

Explore the hidden complexities and costs of building your own web-based subtitle editor. Learn how Closed Caption Creator's IFrame integration offers a powerful, cost-effective alternative for professional captioning.