2017-01-07 0:22 GMT+08:00 Bodecs Bela <bode...@vivanet.hu>: > > > 2017.01.06. 16:50 keltezéssel, Steven Liu írta: > >> 2017-01-06 22:07 GMT+08:00 Bodecs Bela <bode...@vivanet.hu>: >> >> Dear All, >>> >>> in avformat/hlsenc the start_number option starts the playlist sequence >>> number >>> (#EXT-X-MEDIA-SEQUENCE) from the specified number. Unless hls_flags >>> single_file is set, it also specifies starting sequence numbers of >>> segment and subtitle filenames. Sometimes it is usefull to have unique >>> starting numbers at each run, but currently it is only achiveable by >>> setting this parameter manually. >>> This patch enables to set start_number parameter automatically for >>> practically unique numbers. If start_number is set to -1, then >>> the start number will be the seconds since epoch (1970-01-01 00:00:00). >>> If set to -2, then the start number will be based on the current >>> date/time value as YYYYmmddHHMMSS. e.g. 20161231235659. >>> >>> >>> thank you, >>> >>> Bela Bodecs >>> >>> >>> _______________________________________________ >>> ffmpeg-devel mailing list >>> ffmpeg-devel@ffmpeg.org >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >>> >>> >>> Two question: >> 1. char b[21]; Why this is 21 ? >> > you are right, 15 is enough. > >> 2. + {"start_number", "set first number in the sequence", >> OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, -2, >> INT64_MAX, >> E}, >> Why is this -2 and the help message maybe need more infomation, for >> example >> -2 mean -1 mean 0 mean, and default value. >> > yes, I have altered now but I have written verbosly into the doc > (muxers.texi), here: > > +If set to -1, then the start number will be the seconds since epoch > (1970-01-01 00:00:00). > +If set to -2, then the start number will be based on the current > date/time as YYYYmmddHHMMSS. e.g. 20161231235759. > +Default value is 0. > > _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > I have enclosed a fixed version. A have changed some code, where greater > than 32 bit long sequence numbers were not handled correctly. > (av_get_frame_filename2) > > thank you. > Bela Bodecs > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > + {"start_number", "set first number in the sequence, 0 is default, -1: second since epoch, -2: current datetime as YYYYMMDDhhmmss, actual value otherwise", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, -2, INT64_MAX, E},
I have check this option, i think add flag to control the start_number maybe better, for example: hls_flags hls_playlist_type maybe add a start_number_flags is better, What about you think? _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
