Hello, Nick. Some containers (like matroska/mkv) tags audio and subtitle streams with language tag and some comment. From mplayer console output:
> [lavf] stream 0: video (h264), -vid 0 > [lavf] stream 1: audio (aac), -aid 0, -alang rus, Rus BaibaKo.tv > [lavf] stream 2: audio (ac3), -aid 1, -alang eng, Eng Also subtitles streams can be included in container (at least in mkv). I don't know any established semantics for video streams but the first usually is default for playback. -- Best regards, Konstantin Gribov. 2014-03-27 19:34 GMT+04:00 Nick Burch <n...@apache.org>: > Hi All > > Does anyone know if we have a recommended way / plan of a way to handle > video files with possibly multiple audio streams? > > Most of the multimedia container formats support video and zero or one > audio streams, and a fair number support video and multiple audio streams. > A few can actually hold multiple video and multiple audio. Some can tell > you the relationship between the streams (eg video 0 = main video, video 1 > = subtitle overlay, audio 0 = english, audio 1 = french, audio 2 = english > commentary). Some you just find what's there, and have to guess how it fits > together. > > So, now I'm looking at adding some basic video parsing support into the > Ogg stuff, how should I be having the parser report the metadata and > content for streams with both video and audio? > > (Currently, MP4Parser looks to have "TODO Decide how to handle multiple > tracks", and just dumps the audio information into the metadata along with > the video) > > Nick >
