[FFmpeg-trac] #2224(undetermined:new): HLS output using main or high profile has crazy initial timestamps

[FFmpeg]

#2224: HLS output using main or high profile has crazy initial timestamps
-------------------------------------+-------------------------------------
             Reporter:  nealzebub    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  libx264      |               Resolution:
  mpegts                             |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by nealzebub):

 Replying to [comment:1 cehoyos]:
 > Is there any specification that clarifies that timestamp wraps are not
 allowed in HLS streams?
 >
 > And could you confirm that there are no problems with the validator if
 you disable B-frames?
 Spec.  I'm not exactly sure what you mean by timestamp wrap, but I think
 this is what you mean:
 [http://tools.ietf.org/html/draft-pantos-http-live-
 streaming-10#section-3.4.11]
 It basically says that if the timestamps do not increment between
 segments, that tag they mention needs to be stuck in the playlist before
 the next segment to warn the player.

 I just encoded main with no b-frame(same command with that one addition):
 ''./ffmpeg.20130129 -report -i ./source_media/bigbuckbunny_1500.mp4
 -frames:v 480 -vsync -1 -c:v libx264 -crf 23 -profile:v main -bf 0 -g 48
 -sc_threshold 0 -flags +cgop -c:a aac -strict -2 -b:a 112k -map 0:v:0 -map
 0:a:0 -f ssegment -segment_time 10 -segment_list hls_main.m3u8
 -segment_list_flags +live -segment_format mpegts "hlsAV_main_%04d.ts"''

 When I do a comparison of the ffprobe -show_packets output from baseline
 and main minus bframes, the only difference are position and size.  That
 means that the timestamps are identical.  I suppose the ticket title
 should change to "b-frames" from "main or high profile"!

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2224#comment:2>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker