Subtitle casting guide
Subtitle delivery depends on the selected format. CouchCast can send compatible text as a selectable track or burn styled and bitmap subtitles into the prepared video when Chromecast cannot render them directly.
How it works
Open a supported MP4 or MKV. CouchCast checks its embedded tracks; a same-basename SRT beside an MP4 may also be found when file access permits.
Choose an embedded subtitle track, no subtitles, or an external SRT or ASS file, then select a supported Chromecast on the same local network.
CouchCast prepares the selected subtitle source as a text track or burns it into the video when the format requires it.
Good to know
Embedded SubRip or an external SRT can become WebVTT. Compatible WebVTT may be copied or converted into a served text track. Rendering can differ between receivers, so CouchCast does not promise identical text styling everywhere.
If macOS file-access rules prevent automatic sidecar discovery, explicitly selecting the external subtitle file remains available.
ASS/SSA, PGS, DVD subtitles, and VobSub need burn-in or bitmap-overlay preparation. Changing the video frames can require VideoToolbox H.264/AAC HLS rather than a lossless remux, and may use more time and energy.
CouchCast does not OCR, translate, download subtitle content, or guarantee every style on every receiver.
CouchCast does not search subtitle services, translate captions, guarantee every style, or promise that every receiver renders a selectable text track identically. It prepares the subtitle source you select.
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