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• ffmpeg replace audio with filter complex start and end time [closed]

  3 juin 2020, par a4n6c

  I have this code that I found on one of the posts in StackOverflow and I tested it and it works however the only slight problem I need fixing on this.
  

  



  ffmpeg -y -i  "C:\Users\test\Desktop\vidz\New folder (2)\target\vaastav song .mp4" -i "C:\Users\test\Desktop\vidz\New folder (2)\target\2.mp3" -filter_complex "[0:a]atrim=start=0:05,asetpts=PTS-STARTPTS[aud1];[1:a]atrim=0:09,afade=t=out:st=57:d=3,asetpts=PTS-STARTPTS[aud2];  [aud2][aud1]concat=n=2:v=0:a=1[aout]"  -map 0:v -map "[aout]" -c:v copy -c:a  libmp3lame "C:\Users\test\Desktop\vidz\New folder (2)\target\output1.mp4"


  



  were you see the end-time [1:a]atrim=0:09 works ok does what i need it to do but the start time is not working accordingly as it starts playing the mp3 on the start of the video even when i set the time too atrim=start=0:05.

  


• Revision 16783 : use stream.time_base for subtitles to keep time from input if possible, ...

  14 janvier 2010, par j — Log

  use stream.time_base for subtitles to keep time from input if possible, patch by ogg.k

• FFmpeg for marking time video based on a reference date

  29 décembre 2018, 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
  
  ...
  
  ...