From 557c0df9a854350853ae0609a7728a4fb1ba3383 Mon Sep 17 00:00:00 2001 From: Bela Bodecs Date: Tue, 3 Jan 2017 22:57:51 +0800 Subject: avformat/hlsenc: size and duration in segment filenames 1st: This patch makes it possible to put actual segment file size (measured in bytes) and/or duration (calculated in microseconds) into segment filenames. This feature is useful when post-processing live streaming access log files. New behaviour works only when -use_localtime option is set and second_level_segment_size or/and second_level_segment_duration new hls_flags are specified. %%s is the placeholder for size and %%t for duration in hls_segment_filename option. Fix sized trailing zeropadding also works eg. %%09s or %%023t. A command to test new features: ./ffmpeg -loglevel info -y -f lavfi -i color=c=red:size=640x480:r=25 -f lavfi -i sine=f=440:b=4:r=44100 -c:v mpeg2video -g 25 -acodec aac -cutoff 20000 -ac 2 -ar 44100 -ab 192k -f hls -hls_time 3 -hls_list_size 5 -hls_flags second_level_segment_index+second_level_segment_size+second_level_segment_duration -use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename "segment_%Y%m%d%H%M%S_%%04d_%%08s_%%013t.ts" stream.m3u8 2nd: doc/muxers: beside second_level_segment_duration and second_level_segment_size, added some more details and example to hls_segment_filename, use_localtime, use_localtime_mkdir, hls_flags. hls_flags option list reformatted to table Signed-off-by: Bela Bodecs Signed-off-by: Steven Liu --- doc/muxers.texi | 71 ++++++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 58 insertions(+), 13 deletions(-) (limited to 'doc/muxers.texi') diff --git a/doc/muxers.texi b/doc/muxers.texi index c2598b26b8..b4a107ceec 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -441,8 +441,15 @@ ffmpeg -i in.nut -hls_segment_filename 'file%03d.ts' out.m3u8 This example will produce the playlist, @file{out.m3u8}, and segment files: @file{file000.ts}, @file{file001.ts}, @file{file002.ts}, etc. +@var{filename} may contain full path or relative path specification, +but only the file name part without any path info will be contained in the m3u8 segment list. +Should a relative path be specified, the path of the created segment +files will be relative to the current working directory. +When use_localtime_mkdir is set, the whole expanded value of @var{filename} will be written into the m3u8 segment list. + + @item use_localtime -Use strftime on @var{filename} to expand the segment filename with localtime. +Use strftime() on @var{filename} to expand the segment filename with localtime. The segment number is also available in this mode, but to use it, you need to specify second_level_segment_index hls_flag and %%d will be the specifier. @example @@ -450,6 +457,8 @@ ffmpeg -i in.nut -use_localtime 1 -hls_segment_filename 'file-%Y%m%d-%s.ts' out. @end example This example will produce the playlist, @file{out.m3u8}, and segment files: @file{file-20160215-1455569023.ts}, @file{file-20160215-1455569024.ts}, etc. +Note: On some systems/environments, the @code{%s} specifier is not available. See + @code{strftime()} documentation. @example ffmpeg -i in.nut -use_localtime 1 -hls_flags second_level_segment_index -hls_segment_filename 'file-%Y%m%d-%%04d.ts' out.m3u8 @end example @@ -457,14 +466,21 @@ This example will produce the playlist, @file{out.m3u8}, and segment files: @file{file-20160215-0001.ts}, @file{file-20160215-0002.ts}, etc. @item use_localtime_mkdir -Used together with -use_localtime, it will create up to one subdirectory which +Used together with -use_localtime, it will create all subdirectories which is expanded in @var{filename}. @example ffmpeg -i in.nut -use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename '%Y%m%d/file-%Y%m%d-%s.ts' out.m3u8 @end example This example will create a directory 201560215 (if it does not exist), and then produce the playlist, @file{out.m3u8}, and segment files: -@file{201560215/file-20160215-1455569023.ts}, @file{201560215/file-20160215-1455569024.ts}, etc. +@file{20160215/file-20160215-1455569023.ts}, @file{20160215/file-20160215-1455569024.ts}, etc. + +@example +ffmpeg -i in.nut -use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename '%Y/%m/%d/file-%Y%m%d-%s.ts' out.m3u8 +@end example +This example will create a directory hierarchy 2016/02/15 (if any of them do not exist), and then +produce the playlist, @file{out.m3u8}, and segment files: +@file{2016/02/15/file-20160215-1455569023.ts}, @file{2016/02/15/file-20160215-1455569024.ts}, etc. @item hls_key_info_file @var{key_info_file} @@ -523,7 +539,12 @@ ffmpeg -f lavfi -re -i testsrc -c:v h264 -hls_flags delete_segments \ -hls_key_info_file file.keyinfo out.m3u8 @end example -@item hls_flags single_file + +@item hls_flags @var{flags} +Possible values: + +@table @samp +@item single_file If this flag is set, the muxer will store all segments in a single MPEG-TS file, and will use byte ranges in the playlist. HLS playlists generated with this way will have the version number 4. @@ -534,36 +555,60 @@ ffmpeg -i in.nut -hls_flags single_file out.m3u8 Will produce the playlist, @file{out.m3u8}, and a single segment file, @file{out.ts}. -@item hls_flags delete_segments +@item delete_segments Segment files removed from the playlist are deleted after a period of time equal to the duration of the segment plus the duration of the playlist. -@item hls_flags append_list +@item append_list Append new segments into the end of old segment list, and remove the @code{#EXT-X-ENDLIST} from the old segment list. -@item hls_flags round_durations +@item round_durations Round the duration info in the playlist file segment info to integer values, instead of using floating point. -@item hls_flags discont_starts +@item discont_starts Add the @code{#EXT-X-DISCONTINUITY} tag to the playlist, before the first segment's information. -@item hls_flags omit_endlist +@item omit_endlist Do not append the @code{EXT-X-ENDLIST} tag at the end of the playlist. -@item hls_flags split_by_time +@item split_by_time Allow segments to start on frames other than keyframes. This improves behavior on some players when the time between keyframes is inconsistent, but may make things worse on others, and can cause some oddities during seeking. This flag should be used with the @code{hls_time} option. -@item hls_flags program_date_time +@item program_date_time Generate @code{EXT-X-PROGRAM-DATE-TIME} tags. -@item hls_flags second_level_segment_index -Makes it possible to use segment indexes as %%d besides date/time values when use_localtime is on. +@item second_level_segment_index +Makes it possible to use segment indexes as %%d in hls_segment_filename expression +besides date/time values when use_localtime is on. +To get fixed width numbers with trailing zeroes, %%0xd format is available where x is the required width. + +@item second_level_segment_size +Makes it possible to use segment sizes (counted in bytes) as %%s in hls_segment_filename +expression besides date/time values when use_localtime is on. +To get fixed width numbers with trailing zeroes, %%0xs format is available where x is the required width. + +@item second_level_segment_duration +Makes it possible to use segment duration (calculated in microseconds) as %%t in hls_segment_filename +expression besides date/time values when use_localtime is on. +To get fixed width numbers with trailing zeroes, %%0xt format is available where x is the required width. + +@example +ffmpeg -i sample.mpeg \ + -f hls -hls_time 3 -hls_list_size 5 \ + -hls_flags second_level_segment_index+second_level_segment_size+second_level_segment_duration \ + -use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename "segment_%Y%m%d%H%M%S_%%04d_%%08s_%%013t.ts" stream.m3u8 +@end example +This will produce segments like this: +@file{segment_20170102194334_0003_00122200_0000003000000.ts}, @file{segment_20170102194334_0004_00120072_0000003000000.ts} etc. + + +@end table @item hls_playlist_type event Emit @code{#EXT-X-PLAYLIST-TYPE:EVENT} in the m3u8 header. 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