From 317ff2186aa6c61e6ed4f69b61d07fda787f1328 Mon Sep 17 00:00:00 2001 From: "Steinar H. Gunderson" Date: Tue, 29 Jan 2019 00:04:35 +0100 Subject: [PATCH] Write about subtitles from the Nageru theme side. --- video.rst | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/video.rst b/video.rst index ed565f8..12e32e3 100644 --- a/video.rst +++ b/video.rst @@ -107,6 +107,23 @@ This is particularly useful when dealing with network streams, as FFmpeg does no always properly detect if the connection has been lost. See :ref:`menus` for a way to expose such functionality to the operator. +.. _subtitle-ingest: + +Ingesting subtitles +------------------- + +Video streams can contain separate subtitle tracks. Since Nageru 1.8.1, +you can read these streams. This is particularly useful when using Nageru +and Futatabi together (see :ref:`talkback`). + +To get the last subtitle given before the current video frame, call +“signals:get_last_subtitle(n)” from get_chain, where n is the signal number +of your video signal. It will either contain nil, if there hasn't been +a subtitle, or else the raw subtitle. Note that if the video frame and +the subtitle occur on the exact same timestamp, and the video frame +is muxed before the subtitle packet, the subtitle will not make it in time. +(Futatabi puts the subtitle slightly ahead of the video frame to avoid this.) + Integration with CasparCG ------------------------- -- 2.39.2