[FFmpeg-trac] #7092(undetermined:new): h264 parser emits every other video packet without pts for mbaff/paff inputs

[FFmpeg]

#7092: h264 parser emits every other video packet without pts for mbaff/paff
inputs
-------------------------------------+-------------------------------------
             Reporter:  tmm1         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Expected:

 Feeding h264 video into lavf would produce AVPackets with pts set.

 Actual:

 On some inputs (which are mbaff/paff), only every other AVPacket has pts
 set.

 How to reproduce:
 {{{
 $ ffprobe -select_streams v -show_packets -print_format json
 http://tmm1.s3.amazonaws.com/uk-nopts.mpg

 ffprobe version N-90375-ge5b4cd4c4a Copyright (c) 2007-2018 the FFmpeg
 developers
   built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
   configuration: --prefix=/tmp/ffmpeg-master --enable-libxml2 --enable-
 shared --disable-static --disable-stripping --disable-manpages
   libavutil      56. 11.100 / 56. 11.100
   libavcodec     58. 14.100 / 58. 14.100
   libavformat    58. 10.100 / 58. 10.100
   libavdevice    58.  2.100 / 58.  2.100
   libavfilter     7. 13.100 /  7. 13.100
   libswscale      5.  0.102 /  5.  0.102
   libswresample   3.  0.101 /  3.  0.101

 Input #0, mpegts, from 'http://tmm1.s3.amazonaws.com/uk-nopts.mpg':
   Duration: 00:00:21.66, start: 2500.739878, bitrate: 5809 kb/s
   Program 17664
     Stream #0:0[0x12d]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25
 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x12e](eng): Audio: aac_latm (LC) ([17][0][0][0] /
 0x0011), 48000 Hz, stereo, fltp
     Stream #0:2[0x132](eng): Unknown: none ([17][0][0][0] / 0x0011)
 (visual impaired) (dependent)
     Stream #0:3[0x131](eng): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)
 Unsupported codec with id 0 for input stream 2
 {
     "packets": [
         {
             "codec_type": "video",
             "stream_index": 0,
             "pts": 225158417,
             "pts_time": "2501.760189",
             "dts": 225147617,
             "dts_time": "2501.640189",
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "30176",
             "pos": "6016",
             "flags": "__",
             "side_data_list": [
                 {
                     "side_data_type": "MPEGTS Stream ID"
                 }
             ]
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "11828",
             "flags": "__",
             "side_data_list": [
                 {
                     "side_data_type": "MPEGTS Stream ID"
                 }
             ]
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "pts": 225154817,
             "pts_time": "2501.720189",
             "dts": 225151217,
             "dts_time": "2501.680189",
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "8334",
             "pos": "50008",
             "flags": "__"
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "7151",
             "flags": "__",
             "side_data_list": [
                 {
                     "side_data_type": "MPEGTS Stream ID"
                 }
             ]
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "pts": 225162017,
             "pts_time": "2501.800189",
             "dts": 225154817,
             "dts_time": "2501.720189",
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "10301",
             "pos": "66364",
             "flags": "__"
 q        },
         {
             "codec_type": "video",
             "stream_index": 0,
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "7819",
             "flags": "__",
             "side_data_list": [
                 {
                     "side_data_type": "MPEGTS Stream ID"
                 }
             ]
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "pts": 225194417,
             "pts_time": "2502.160189",
             "dts": 225158417,
             "dts_time": "2501.760189",
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "93387",
             "pos": "85540",
             "flags": "__"
         },
         {
             "codec_type": "video",
             "stream_index": 0,
             "duration": 1800,
             "duration_time": "0.020000",
             "size": "23562",
             "flags": "__",
             "side_data_list": [
                 {
                     "side_data_type": "MPEGTS Stream ID"
                 }
             ]
         },
         ...
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7092>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker