[FFmpeg-trac] #9128(undetermined:new): HLS multi bitrate streaming, timestamps differ when one of the video track is copied

FFmpeg trac at avcodec.org
Wed Mar 3 08:39:51 EET 2021


#9128: HLS multi bitrate streaming, timestamps differ when one of the video track
is copied
-------------------------------------+-------------------------------------
             Reporter:  krs_vital    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  hls          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by stevenliu):

 Replying to [comment:1 krs_vital]:
 > ffprobe /store/records/TEST/2021/02/26/08/1614328735_0.ts
 > Duration: 00:00:10.31, start: 41.698667, bitrate: 3225 kb/s
 >
 > ffprobe /store/records/TEST/2021/02/26/08/1614328735_1.ts
 > Duration: 00:00:10.02, start: 41.421333, bitrate: 5397 kb/s
 >
 > ffprobe /store/records/TEST/2021/02/26/08/1614328735_2.ts
 > Duration: 00:00:10.02, start: 41.421333, bitrate: 2226 kb/s
 >
 > Start time in "0" playlist version differ from "1" and "2":
 >
 > 41.698667 [ 0 ] <-> 41.421333 [ 1, 2 ]



 {{{
 ffprobe /store/records/TEST/2021/02/26/08/1614328735_0.ts
 Input #0, mpegts, from
 '/store/records/TEST/2021/02/26/08/1614328735_0.ts':
 Duration: 00:00:10.31, start: 41.698667, bitrate: 3225 kb/s
 Program 1
 Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50
 tbr, 90k tbn, 50 tbc


 ffprobe /store/records/TEST/2021/02/26/08/1614328735_1.ts
 Input #0, mpegts, from
 '/store/records/TEST/2021/02/26/08/1614328735_1.ts':
 Duration: 00:00:10.02, start: 41.421333, bitrate: 5397 kb/s
 Program 1
 Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50
 tbr, 90k tbn, 100 tbc


 ffprobe /store/records/TEST/2021/02/26/08/1614328735_2.ts
 Input #0, mpegts, from
 '/store/records/TEST/2021/02/26/08/1614328735_2.ts':
 Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50
 tbr, 90k tbn, 100 tbc

 }}}

 look at first stream info, the fps tbc is different to another two
 streams, maybe ffprobe show_packets look all of three streams and analyze
 the different should more clear.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/9128#comment:4>
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