[FFmpeg-trac] #1979(FFmpeg:new): Automatically set -fflags +genpts

[FFmpeg]

#1979: Automatically set -fflags +genpts
-------------------------------------+-------------------------------------
             Reporter:  cehoyos      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  FFmpeg
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  av_interleaved_write_frame         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by bernd_b):

 I can't confirm that adding -fflags +genpts helps in every case:

 ffmpeg -fflags +genpts -i Sport_HD_CUT_ntsc.264 -i Sport_HD_CUT_ntsc.ac3
 -codec copy -map 0:0 -map 1:0 -f matroska  Sport_HD_CUT_ntsc.mkv
 ffmpeg version 1.1.git Copyright (c) 2000-2013 the FFmpeg developers
   built on May  4 2013 13:30:41 with gcc 4.6.3 (Gentoo Hardened 4.6.3
 p1.3, pie-0.5.2)
   configuration: --enable-avresample --enable-gpl --enable-libx264
 --enable-nonfree --enable-libmp3lame --enable-libfaac --enable-frei0r
 --enable-libsoxr --cpu=amd64 --arch=x86_64 --enable-version3
   libavutil      52. 28.100 / 52. 28.100
   libavcodec     55.  7.100 / 55.  7.100
   libavformat    55.  4.101 / 55.  4.101
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 63.101 /  3. 63.101
   libavresample   1.  1.  0 /  1.  1.  0
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 [h264 @ 0x7fad8bf7f1c0] Stream #0: not enough frames to estimate rate;
 consider increasing probesize
 Input #0, h264, from 'Sport_HD_CUT_ntsc.264':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: h264 (High), yuv420p, 1280x720 [SAR 1:1 DAR 16:9],
 23.98 fps, 23.98 tbr, 1200k tbn, 47.95 tbc
 [ac3 @ 0x7fad8bf81480] max_analyze_duration 5000000 reached at 5024000
 microseconds
 [ac3 @ 0x7fad8bf81480] Estimating duration from bitrate, this may be
 inaccurate
 Input #1, ac3, from 'Sport_HD_CUT_ntsc.ac3':
   Duration: 00:01:00.58, start: 0.000000, bitrate: 448 kb/s
     Stream #1:0: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s
 File 'Sport_HD_CUT_ntsc.mkv' already exists. Overwrite ? [y/N] y
 Output #0, matroska, to 'Sport_HD_CUT_ntsc.mkv':
   Metadata:
     encoder         : Lavf55.4.101
     Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 1280x720 [SAR
 1:1 DAR 16:9], q=2-31, 23.98 fps, 1k tbn, 1200k tbc
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, 448
 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #1:0 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [matroska @ 0x7fad8bf82240] Can't write packet with unknown timestamp
 av_interleaved_write_frame(): Invalid argument

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1979#comment:7>
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