[FFmpeg-user] What does this message mean?

[batguano999]

Hi
What does this message mean please?
"Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead."

It is brown, not red, so I suppose it is not an error - only advisory.

Should I modify my commands?

@Xubuntu:~/ffmpeg-HEAD-66558fe$ ./ffmpeg -i foo.wav foo.flac
ffmpeg version 2.2.git-66558fe Copyright (c) 2000-2014 the FFmpeg developers
  built on Jul 12 2014 13:10:07 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration: 
  libavutil      52. 92.100 / 52. 92.100
  libavcodec     55. 69.100 / 55. 69.100
  libavformat    55. 45.100 / 55. 45.100
  libavdevice    55. 13.102 / 55. 13.102
  libavfilter     4. 10.100 /  4. 10.100
  libswscale      2.  6.100 /  2.  6.100
  libswresample   0. 19.100 /  0. 19.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'foo.wav':
  Metadata:
    encoder         : Lavf55.41.100
  Duration: 00:00:30.00, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
[flac @ 0xaeca240] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
Output #0, flac, to 'foo.flac':
  Metadata:
    encoder         : Lavf55.45.100
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s16, 128 kb/s
    Metadata:
      encoder         : Lavc55.69.100 flac
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> flac (native))
Press [q] to stop, [?] for help
size=    3239kB time=00:00:30.10 bitrate= 881.3kbits/s    
video:0kB audio:3231kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.250537%