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• FFmpeg for marking time video based on a reference date

  3 août 2016, par Denio Mariz

  I am trying to mark a timestamp in a video using Drawtext filter.
  FFmpeg easily marks timestamps based on localtime, gmtime or even PTS. However, I want to assign a reference time (start time) for the timestamp in order to represent the time the video was recorded (not encoded).

  Reading the documentation, I found that option "basetime" can be used for this purpose. However it seems that is not working or I am missing something.

  The command line I am using is :

  ffmpeg -y -i input.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1456007118" output.mp4

  By using basetime=1456007118", it was expected the start time was set to ’02/20/2016 20:25:18’ since 1456007118 is the UTC time for that time and date :

  date -d '02/20/2016 20:25:18' +"%s" # format MM/DD/AAAA hh:mm:ss
  
  1456007118

  However, no error is issued by FFMpeg and the video is marked with current GMT, ignoring "basetime" option.

  Any hint ?
  Thanks.

  Complete information about FFmpeg version and output is :

     ffmpeg -y -i /home/denio/Videos/Interstellar_2014_Trailer_4_5.1-1080p-HDTN.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1470226363" /tmp/x.mp4
   ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
     built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2.1) 20160413
     configuration: --enable-libxavs --enable-bzlib --enable-libfaac --enable-libfreetype --enable-libfontconfig --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-x11grab --enable-static --enable-pthreads --enable-gpl --enable-nonfree --enable-version3 --disable-ffserver --enable-libgsm --enable-librtmp --enable-libvpx --enable-libschroedinger --enable-libopencore-amrnb --enable-libopenjpeg
     libavutil      55. 28.100 / 55. 28.100
     libavcodec     57. 48.101 / 57. 48.101
     libavformat    57. 41.100 / 57. 41.100
     libavdevice    57.  0.101 / 57.  0.101
     libavfilter     6. 47.100 /  6. 47.100
     libswscale      4.  1.100 /  4.  1.100
     libswresample   2.  1.100 /  2.  1.100
     libpostproc    54.  0.100 / 54.  0.100
   ...
   ...

• FFmpeg error - “at least one output file must be specified” windows version

  30 juin 2016, par AComputert

  I’m having a little trouble, and I feel like the solution is probably starting me in the face.
  How Can I extract mp4 from HTTP live streaming m3u8 file ? I Tried this command below :

  ffmpeg -i http://ms1.movieland.ir/marci6z9OSicn34CRRcin2y4nv6KRZvigAIBsBbBGlj2HUPZBeEOY1019Zxc6zlQrq3ZkYrW0PiM1WDbpVn2JQ2/vod/5787c62c-fb29-4ca4-a328-b7447bb83436/medialist.m3u8?rpt=%5C2016%5C6%5C5787c62c-fb29-4ca4-a328-b7447bb83436&pid=0 -c copy -bsf:a aac_adtstoasc f:\stream\dora.mp4

  When run, this yells at me that "At least one output file must be specified". I’ve been knocking me head on the wall for hours now, what am I missing ?

• ffmpeg difference between time and rtime, utime

  15 janvier, par nojob

  When I execute a command with "-benchmark" I can get some information like
rtime, utime, stime which are real time, user time and system time respectively.
But I can't understand what are they exactly ?
Because as I know, the real time is the wall clock which means the time that the whole process needs.

  


  And there is another time at the end of the command.

  


  Like below :

  


  

  


  What is the difference between them ?
time : 00:00:00.16
rtime : 0.197s