Subs or captioning may be present in different types of video streams. DVD & Blu-ray subs are like audio a separate file that's combined with the video. Streaming services and cable also use a separate subtitle or captioning stream alongside video and audio streams -- they may use their own proprietary format. DVDs may also have captioning embedded in the video itself, but it cannot make it to a TV so the TV can decode it over HDMI -- however, traditional captioning can be included in digital over the air broadcast streams.

With few exceptions, e.g. some versions of Nero Recode when used with DVDs, subtitles &/or captions need to be treated separately whenever you're not using/viewing the original video stream that includes audio & subs, e.g. with re-encoded or converted video files. There are tools, e.g. ccextractor, to extract embedded captions to a specially formatted .srt text files, and there are tools, e.g. Subtitle Edit, to OCR DVD & Blu-ray graphics-based subs to .srt files. Methods & tools for streaming, cable, & satellite video varies according to the source & the tools you use to download or capture these usually DRMed streams.

Once you have an .srt file, the easiest way to view subs is to store that file next to the video file, using the same name for each -- very many players, including OEM players on cell phones, can then display those subs. Video converters can also often import .srt files, but any advantage is dubious -- as a separate file you can turn sub display on/off, and usually have control over how it's displayed, e.g. font, size, shading etc. Note: there are apps or tools to adjust subtitle timing *if* needed, modifying the .srt file.

mike  –  3 years ago  –  このコメントは役に立ちましたか？ はい | いいえ (+13)

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