[FFmpeg-user] Understanding stats infos

[MrNice]

Hi,

When I record from v4l2 in debug mode, I get no error message, only
green lines.
./ffmpeg -debug 1 -f pulse -ar 44100 -ac 2 -channel_layout stereo
-thread_queue_size 1024 -i alsa_input.pci-0000_00_14.2.analog-stereo -f
v4l2 -use_wallclock_as_timestamps 1 -itsoffset 1.69 -channel 1
-video_size 720x576 -pix_fmt yuyv422 -thread_queue_size 1024 -i
/dev/video0 -c:a pcm_s16le -channel_layout stereo -c:v ffv1 -level 3 -g
1 -aspect 4:3 -pix_fmt yuv422p -top 0 -vsync passthrough
/Store3/Test/t_`date +%Y%m%d_%H%M`.mkv


Then when I run the following command on the file I get a lot of same
errors in red.
Are these errors recorded in the file or are they generated when reading?

./ffmpeg -i /Store3/Test/t_20151129_1015.mkv -f null /dev/nullffmpeg
version N-76674-g7ad698e Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.1.1 (GCC) 20150618 (Red Hat 5.1.1-4)
  configuration: --enable-libpulse --enable-gpl --enable-libx264
  libavutil      55.  6.100 / 55.  6.100
  libavcodec     57. 15.100 / 57. 15.100
  libavformat    57. 14.100 / 57. 14.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 15.100 /  6. 15.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, matroska,webm, from '/Store3/Test/t_20151129_1015.mkv':
  Metadata:
    ENCODER         : Lavf57.14.100
  Duration: 00:03:01.33, start: 0.000000, bitrate: 37498 kb/s
    Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p, 720x576, SAR
16:15 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc57.15.100 ffv1
      DURATION        : 00:03:01.200000000
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
(default)
    Metadata:
      ENCODER         : Lavc57.15.100 pcm_s16le
      DURATION        : 00:03:01.325000000
Output #0, null, to '/dev/null':
  Metadata:
    encoder         : Lavf57.14.100
    Stream #0:0: Video: wrapped_avframe, yuv422p, 720x576 [SAR 16:15 DAR
4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      DURATION        : 00:03:01.200000000
      encoder         : Lavc57.15.100 wrapped_avframe
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
(default)
    Metadata:
      DURATION        : 00:03:01.325000000
      encoder         : Lavc57.15.100 pcm_s16le
Stream mapping:
  Stream #0:0 -> #0:0 (ffv1 (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 131 >= 131
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 173 >= 173
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 210 >= 210
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 817 >= 817
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 836 >= 836
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 849 >= 849
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 868 >= 868
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0: 881 >= 881
[null @ 0x3101c20] Application provided invalid, non monotonically
increasing dts to muxer in stream 0
... and more