thanks. Yes, readahead the list is must. but during playback, I found ffmpeg downloads each content of the list -- av_read_frame() returns me each content with different stream_index. I'm expecting av_read_frame() returns me the interested stream only. I haven't found a way to do so; or said, is there ffmpeg interface to specify a dedicate stream (stream_index) to download.
i'm looking into hls.c; there is recheck_discard_flags(), seems it is designed to do some policy like this. but I haven't found one top level interface of ffmpeg for it. recheck_discard_flags() is called once only during hls_read_packet() when c->first_packet is set -- this flag is set in hls_read_header() only. 2016-06-28 22:22 GMT+08:00 Steven Liu <lingjiujia...@gmail.com>: > 2016-06-28 14:26 GMT+08:00 aihua zhao <aihua.halley.z...@gmail.com>: > > > Hi Experts: > > > > I use ffmpeg to parse/demux media content, and created a player basing on > > it. > > > > here is a m3u8 content: > > > > > http://asp.cntv.lxdns.com/asp/hls/main/0303000a/3/default/438eb7a818b246c187e72f1cd4e1bc4c/main.m3u8 > > < > > > http://asp.cntv.lxdns.com/asp/hls/main/0303000a/3/default/438eb7a818b246c187e72f1cd4e1bc4c/main.m3u8?maxbr=1200 > > > > > there are three video track in it. > > > > I found all video/audio tracks are downloaded during playback, and I can > > switch different track on the fly. > > however, it consumes much bandwidth since all tracks are downloaded. > > > > even when I append bandwidth to the url; still the same result: > > > > > http://asp.cntv.lxdns.com/asp/hls/main/0303000a/3/default/438eb7a818b246c187e72f1cd4e1bc4c/main.m3u8?maxbr=1200 > > > > Is there any way to download the specified track only to save bandwidth? > > > > thanks > > > > Hi Aihua Zhao, > > If you haven't read the m3u8 file and parse the playlist, and read > the sub m3u8 playlist, how do you get the info of the mpegts? > > So it's must readahead the list and list all of the track for choose. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
