1.271 (1/16/2026)

Features

• Improvements to speed of Combine Segments task when rendering larger outputs
• Added optional content_duration_sec parameter when defining SCC sources to inform the end time of the last cue if there is no control code in the SCC source to clear the final caption
• Added rounding_mode parameter to SCTE35 configuration to choose whether the PTS splice time should be rounded up or down when setting an IDR frame

Fixes

• Resolved task failures when using URLs greater than 2048 characters in length
• Resolved issue with incorrect output frame rate and duration when using generated sources in a complex asset as well as segmented rendering, and the target frame rate is half of the source frame rate
• Resolved potential parity errors in CEA-608 tracks when converting from VTT
• Resolved issue when converting roll-up SCC sources to VTT where a line of captions may be repeated when the writing row position changes
• Resolved issue when converting roll-up SCC sources to VTT where some cues in the output are empty or contain extra empty lines, or contain duplicated lines of content
• Resolved error when converting VTT sources with French ligatures (“œ, Œ, æ, Æ”) to SCC
• Resolved error when trimming VTT sources when the trim value results in no captions in the output
• Resolved caption sync issue when converting VTT sources to embedded CEA-608/708 caption tracks in outputs with a frame rate greater than 25fps
• Resolved issue where CEA-708 caption track may be missing from output when XDS metadata is configured
• Resolved issue with missing characters before an apostrophe character when converting DFXP to VTT
• Resolved issue with inline styling tags in TTML sources appearing in cues when converting to VTT
• Resolved issue where CEA-608/708 caption tracks in SMPTE 436M sources that start with null data were not recognized