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  • Encoding for HLS using FFMPEG results in have a decreasing DTS

    29 décembre 2014, par Luuk D. Jansen

    I am trying to encode video for HTS live streaming, but am having problems with validating the stream using Apple Media Validator (mediastreamvalidator).
    (my test file : http://dominicansinteractive.idoms.org/media/9536/playlist.m3u8)

    The output is :

    --------------------------------------------------------------------------------
    
http://dominicansinteractive.idoms.org/media/9536/199/prog_index.m3u8
    
--------------------------------------------------------------------------------
    

    
Playlist Validation: 
    

    
    OK
    

    
Segments:
    

    
segment_00000.ts:
    

    
    ERROR: (-1) Decreasing DTS were detected in track 0
    
    ERROR: (-1) Decreasing DTS were detected in track 1
    

    
    Average segment duration: 8.07 seconds
    
    Average segment bitrate: 2155094.67 bps
    
    Average segment structural overhead: 206525.83 bps (9.58 %)

    The second segment doesn’t seem to have the problem :

    [mpegts @ 0x1d78120] Format mpegts probed with size=2048 and score=100
    
[mpegts @ 0x1d78120] stream=0 stream_type=1b pid=100 prog_reg_desc=
    
[mpegts @ 0x1d78120] stream=1 stream_type=f pid=101 prog_reg_desc=
    
[mpegts @ 0x1d78120] File position before avformat_find_stream_info() is 0
    
[h264 @ 0x1d7c1c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[h264 @ 0x1d7c1c0] no picture 
    
[h264 @ 0x1d7c1c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
   Last message repeated 3 times
    
[mpegts @ 0x1d78120] max_analyze_duration 5000000 reached at 5013333
    
[mpegts @ 0x1d78120] File position after avformat_find_stream_info() is 0

    This seems to be a serious problem for HLS, so I am looking if there is a way to fix this.

    When looking with FFMPEG at the encoded file I get (encoder output/command at the bottom of the email) :

    ffmpeg -loglevel 99 -i encoded.ts 
    
ffmpeg version N-37783-gdf3a96c Copyright (c) 2000-2012 the FFmpeg developers
    
 built on Jul  4 2012 07:44:52 with gcc 4.4.5
    
 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libvpx --enable-libfaac --enable-nonfree
    
 libavutil      51. 63.100 / 51. 63.100
    
 libavcodec     54. 32.100 / 54. 32.100
    
 libavformat    54. 14.100 / 54. 14.100
    
 libavdevice    54.  0.100 / 54.  0.100
    
 libavfilter     3.  0.101 /  3.  0.101
    
 libswscale      2.  1.100 /  2.  1.100
    
 libswresample   0. 15.100 /  0. 15.100
    
 libpostproc    52.  0.100 / 52.  0.100
    
[mpegts @ 0x2023120] Format mpegts probed with size=2048 and score=100
    
[mpegts @ 0x2023120] stream=0 stream_type=1b pid=100 prog_reg_desc=
    
[mpegts @ 0x2023120] stream=1 stream_type=f pid=101 prog_reg_desc=
    
[mpegts @ 0x2023120] File position before avformat_find_stream_info() is 0
    
[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[h264 @ 0x20271c0] no picture 
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 143280 in que
    
   Last message repeated 6 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 158640 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 175920 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 193200 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 210480 in que
    
   Last message repeated 7 times
    
[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 227760 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 245040 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 262320 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 279600 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 296880 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 314160 in que
    
   Last message repeated 7 times
    
[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 331440 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 348720 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 366000 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 383280 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 400560 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 417840 in que
    
   Last message repeated 6 times
    
[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 433200 in que
    
   Last message repeated 6 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 448560 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 465840 in que
    
   Last message repeated 6 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 481200 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 498480 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 515760 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 533040 in que
    
   Last message repeated 6 times
    
[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[mpegts @ 0x2023120] first_dts 124080 not matching first dts 548400 in que
    
   Last message repeated 7 times
    
[mpegts @ 0x2023120] max_analyze_duration 5000000 reached at 5000000
    
[mpegts @ 0x2023120] File position after avformat_find_stream_info() is 0
    

    
And when at the first segmented file:
    
ffmpeg -loglevel 99 -i segment_00000.ts 
    
ffmpeg version N-37783-gdf3a96c Copyright (c) 2000-2012 the FFmpeg developers
    
 built on Jul  4 2012 07:44:52 with gcc 4.4.5
    
 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libvpx --enable-libfaac --enable-nonfree
    
 libavutil      51. 63.100 / 51. 63.100
    
 libavcodec     54. 32.100 / 54. 32.100
    
 libavformat    54. 14.100 / 54. 14.100
    
 libavdevice    54.  0.100 / 54.  0.100
    
 libavfilter     3.  0.101 /  3.  0.101
    
 libswscale      2.  1.100 /  2.  1.100
    
 libswresample   0. 15.100 /  0. 15.100
    
 libpostproc    52.  0.100 / 52.  0.100
    
[mpegts @ 0x1a0b120] Format mpegts probed with size=2048 and score=100
    
[mpegts @ 0x1a0b120] stream=0 stream_type=1b pid=100 prog_reg_desc=
    
[mpegts @ 0x1a0b120] stream=1 stream_type=f pid=101 prog_reg_desc=
    
[mpegts @ 0x1a0b120] File position before avformat_find_stream_info() is 0
    
[mpegts @ 0x1a0b120] Invalid timestamps stream=0, pts=1920, dts=8589929312, size=2355
    
[mpegts @ 0x1a0b120] Invalid timestamps stream=0, pts=16320, dts=8589932912, size=3203
    
[h264 @ 0x1a0f1c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
[h264 @ 0x1a0f1c0] no picture 
    
[h264 @ 0x1a0f1c0] Current profile doesn't provide more RBSP data in PPS, skipping
    
   Last message repeated 3 times
    
[mpegts @ 0x1a0b120] max_analyze_duration 5000000 reached at 5013333
    
[mpegts @ 0x1a0b120] File position after avformat_find_stream_info() is 0

    This problem does not occur with the BASELINE profile, but does with MAIN.

    The command I use for encoding is :

    ffmpeg, -i, [path]/test.mov, -y, -f, mpegts, -acodec, aac, -strict, -2, -ar, 48000, -b:a, 128000, -s, 960x540, -vcodec, libx264, -b:v, 1200000, -aspect, 960:540, -r, 25, -level, 3.1, -vprofile, main, -flags, +loop, -cmp, +chroma, -partitions, +parti4x4+partp8x8+partb8x8, -subq, 5, -trellis, 1, -refs, 1, -coder, 0, -me_range, 16, -keyint_min, 25, -sc_threshold, 40, -i_qfactor, 0.71, -bt, 200k, -maxrate, 1200000, -bufsize, 1200000, -rc_eq, 'blurCplx^(1-qComp)', -qcomp, 0.6, -qmin, 10, -qmax, 51, -qdiff, 4, -level, 30, -g, 30, -async, 2, [path]/encoded.ts
    

    
08:40:29,843 DEBUG ~ FFMPEG(1):   libavutil      51. 63.100 / 51. 63.100
    
08:40:29,843 DEBUG ~ FFMPEG(1):   libavcodec     54. 32.100 / 54. 32.100
    
08:40:29,843 DEBUG ~ FFMPEG(1):   libavformat    54. 14.100 / 54. 14.100
    
08:40:29,843 DEBUG ~ FFMPEG(1):   libavdevice    54.  0.100 / 54.  0.100
    
08:40:29,843 DEBUG ~ FFMPEG(1):   libavfilter     3.  0.101 /  3.  0.101
    
08:40:29,844 DEBUG ~ FFMPEG(1):   libswscale      2.  1.100 /  2.  1.100
    
08:40:29,844 DEBUG ~ FFMPEG(1):   libswresample   0. 15.100 /  0. 15.100
    
08:40:29,844 DEBUG ~ FFMPEG(1):   libpostproc    52.  0.100 / 52.  0.100
    
08:40:30,033 DEBUG ~ FFMPEG(1): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '[path]/test.mov':
    
08:40:30,033 DEBUG ~ FFMPEG(1):   Metadata:
    
08:40:30,033 DEBUG ~ FFMPEG(1):     major_brand     : qt  
    
08:40:30,033 DEBUG ~ FFMPEG(1):     minor_version   : 537199360
    
08:40:30,035 DEBUG ~ FFMPEG(1):     compatible_brands: qt  
    
08:40:30,035 DEBUG ~ FFMPEG(1):     creation_time   : 2011-12-05 10:54:24
    
08:40:30,036 DEBUG ~ FFMPEG(1):     timecode        : 00:00:00:00
    
08:40:30,036 DEBUG ~ FFMPEG(1):   Duration: 00:00:24.20, start: 0.000000, bitrate: 9912 kb/s
    
08:40:30,037 DEBUG ~ FFMPEG(1):     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 9777 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
    
08:40:30,037 DEBUG ~ FFMPEG(1):     Metadata:
    
08:40:30,037 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28
    
08:40:30,037 DEBUG ~ FFMPEG(1):       handler_name    : Apple Video Media Handler
    
08:40:30,038 DEBUG ~ FFMPEG(1):     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s
    
08:40:30,038 DEBUG ~ FFMPEG(1):     Metadata:
    
08:40:30,038 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28
    
08:40:30,038 DEBUG ~ FFMPEG(1):       handler_name    : Apple Sound Media Handler
    
08:40:30,038 DEBUG ~ FFMPEG(1):     Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    
08:40:30,038 DEBUG ~ FFMPEG(1):     Metadata:
    
08:40:30,038 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28
    
08:40:30,039 DEBUG ~ FFMPEG(1):       handler_name    : Time Code Media Handler
    
08:40:30,039 DEBUG ~ FFMPEG(1):       timecode        : 00:00:00:00
    
08:40:30,092 DEBUG ~ FFMPEG(1): [graph 0 input from stream 0:0 @ 0x1c17180] w:1920 h:1080 pixfmt:yuv420p tb:1/25 fr:25/1 sar:0/1 sws_param:flags=2
    
08:40:30,092 DEBUG ~ FFMPEG(1): [output stream 0:0 @ 0x1c033a0] No opaque field provided
    
08:40:30,110 DEBUG ~ FFMPEG(1): [scaler for output stream 0:0 @ 0x1c18040] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:960 h:540 fmt:yuv420p sar:0/1 flags:0x4
    
08:40:30,110 DEBUG ~ FFMPEG(1): [graph 1 input from stream 0:1 @ 0x1c53440] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
    
08:40:30,110 DEBUG ~ FFMPEG(1): -async is forwarded to lavfi similarly to -af aresample=min_comp=0.001:min_hard_comp=0.100000:max_soft_comp=0.000042.
    
08:40:30,122 DEBUG ~ FFMPEG(1): [graph 1 aresample for input stream 0:1 @ 0x1c36880] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:flt r:48000Hz
    
08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] using SAR=1/1
    
08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame MB size (60x34) > level limit (1620)
    
08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] DPB size (4 frames, 3133440 bytes) > level limit (3 frames, 3110400 bytes)
    
08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] MB rate (51000) > level limit (40500)
    
08:40:30,170 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] using cpu capabilities: MMX2 SSE2Slow SlowCTZ
    
08:40:30,182 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] profile Main, level 3.0
    
08:40:30,235 DEBUG ~ FFMPEG(1): [mpegts @ 0x1be3540] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
    
08:40:30,235 DEBUG ~ FFMPEG(1): Output #0, mpegts, to '[path]/encoded.ts':
    
08:40:30,235 DEBUG ~ FFMPEG(1):   Metadata:
    
08:40:30,235 DEBUG ~ FFMPEG(1):     major_brand     : qt  
    
08:40:30,235 DEBUG ~ FFMPEG(1):     minor_version   : 537199360
    
08:40:30,235 DEBUG ~ FFMPEG(1):     compatible_brands: qt  
    
08:40:30,235 DEBUG ~ FFMPEG(1):     timecode        : 00:00:00:00
    
08:40:30,235 DEBUG ~ FFMPEG(1):     encoder         : Lavf54.14.100
    
08:40:30,235 DEBUG ~ FFMPEG(1):     Stream #0:0(eng): Video: h264, yuv420p, 960x540 [SAR 1:1 DAR 16:9], q=10-51, 1200 kb/s, 90k tbn, 25 tbc
    
08:40:30,235 DEBUG ~ FFMPEG(1):     Metadata:
    
08:40:30,235 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28
    
08:40:30,235 DEBUG ~ FFMPEG(1):       handler_name    : Apple Video Media Handler
    
08:40:30,236 DEBUG ~ FFMPEG(1):     Stream #0:1(eng): Audio: aac, 48000 Hz, stereo, flt, 128 kb/s
    
08:40:30,236 DEBUG ~ FFMPEG(1):     Metadata:
    
08:40:30,236 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28
    
08:40:30,236 DEBUG ~ FFMPEG(1):       handler_name    : Apple Sound Media Handler
    
08:40:30,236 DEBUG ~ FFMPEG(1): Stream mapping:
    
08:40:30,236 DEBUG ~ FFMPEG(1):   Stream #0:0 -> #0:0 (h264 -> libx264)
    
08:40:30,236 DEBUG ~ FFMPEG(1):   Stream #0:1 -> #0:1 (aac -> aac)
    

    
[...]
    

    
08:40:55,398 DEBUG ~ FFMPEG(1): video:3121kB audio:359kB subtitle:0 global headers:0kB muxing overhead 11.132085%
    
08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame I:21    Avg QP:21.57  size: 88153
    
08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame P:233   Avg QP:22.74  size:  5560
    
08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame B:351   Avg QP:27.45  size:   141
    
08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] consecutive B-frames: 21.7%  2.0%  3.0% 73.4%
    
08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb I  I16..4: 54.5%  0.0% 45.5%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb P  I16..4:  4.7%  0.0%  1.3%  P16..4: 24.6%  3.5%  0.8%  0.0%  0.0%    skip:65.1%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb B  I16..4:  0.1%  0.0%  0.1%  B16..8:  0.5%  0.1%  0.0%  direct: 0.6%  skip:98.6%  L0:32.3% L1:47.1% BI:20.6%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] coded y,uvDC,uvAC intra: 59.4% 5.8% 0.4% inter: 5.4% 3.0% 0.0%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i16 v,h,dc,p: 58% 16% 21%  4%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 21% 17%  5% 10%  7%  5%  5% 10%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i8c dc,h,v,p: 94%  3%  3%  0%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] Weighted P-Frames: Y:13.7% UV:3.4%
    
08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] kb/s:1056.61

    For segmenting is :

    ffmpeg, -i,[path]encoded.ts, -y, -c, copy, -flags, global_header, -map, 0, -f, segment, -segment_time, 10, -segment_list, [path]/fileList.txt, -segment_format, mpegts, [path]/segment_%05d.ts]

    Any help would really be appreciated !

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    Par ailleurs, afin que le raccourci pour les tables puisse produire du XHTML Basic, introduction d’une constante _RACCOURCI_THEAD qui ne produit les verbeux Thead et Tbody que si elle vaut True. Du coup, ce raccourci devient capable de produire des tables ayant plusieurs lignes de Th (...)

  • how to synchronize video with audio through pts in ffmpeg

    10 décembre 2011, par Michael Chen

    I play a h264 format video with ffmpeg, and I try to synchronize video with audio by pts.
    the video format information :

     Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: mp41
    
    creation_time   : 1970-01-01 00:00:00
    
  Duration: 00:00:11.72, start: 0.000000, bitrate: 300 kb/s
    
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 512x384, 250 kb/s, 25 fps, 25 tbr, 25025 tbn, 50 tbc
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 44 kb/s
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
      handler_name    : SoundHandler

    but the first frame's pts is 0 and the second frame' pts is 1001, base_time * pts = 11s ! why ?
    there are long time between the 1st frame with the 2nd frame !

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