Sur d’autres sites (7887)

• avcodec/mips : Improve hevc bi 4 tap hv mc msa functions

  6 novembre 2017, par Kaustubh Raste

  avcodec/mips : Improve hevc bi 4 tap hv mc msa functions
  Use global mask buffer for appropriate mask load.
  
  Use immediate unsigned saturation for clip to max saving one vector register.
  Signed-off-by : Kaustubh Raste <kaustubh.raste@imgtec.com>
  
  Reviewed-by : Manojkumar Bhosale <Manojkumar.Bhosale@imgtec.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mips/hevc_mc_bi_msa.c

• Ffmpeg : mixed audio is played louder and louder, how to set a constant intensity ?

  29 août 2020, par JarsOfJam-Scheduler

  I have these items :

  


  

  • A video (my_video_with_music.webm)

  


  • Three sounds (tmp_music/forest_15s.wav, tmp_music/forest2_15s.wav and tmp_music/creak_15s.wav)

  


  • A background music (tmp_music/original_music.mp3)

  


  


  I mix all these files in two steps. First, I mix the video with the background music. Then, I mix this output with the sounds. A video with the music and the sounds, let name it "THE_VIDEO", is output.

  


  My problem is that "THE_VIDEO" increases in loudness along the video. At the beginning, it's not very loud. At the end of the video, it's very loud. I don't know why. I would want to have a constant loudness (not too loud, not too low).

  


  How can I do it ? Note that the original music file and sounds files don't increase in loudness : they have themselves a constant intensity. So it's actually FFMPEG that increases it when mixing them with the video.

  


  Sources

  


  Mixing the background music with the video (this command doesn't trigger the bug !) :

  


  C:/Users/x/Downloads/ffmpeg/bin/ffmpeg.exe -i my_video.webm -stream_loop -1 -i tmp_music/original_music.mp3 -c:v copy -shortest -fflags +shortest -max_interleave_delta 100M  my_video_with_music.webm


  


  Adding the sounds (this is the command that triggers the bug !) :

  


  C:/Users/x/Downloads/ffmpeg/bin/ffmpeg.exe -i my_video_with_music.webm -i tmp_music/forest_15s.wav -i tmp_music/creak_15s.wav -i tmp_music/forest2_15s.wav -filter_complex [1]adelay=7000|7000[a1];[1]adelay=37000|37000[a2];[1]adelay=88000|88000[a3];[2]adelay=118000|118000[a4];[0][a1][a2][a3][a4]amix=5 -c:v copy my_video_with_music_with_songs.webm


  


• ffmpeg not working in other directory same encoder

  14 mars 2018, par Moein Hosseini

  I’m using a script to convert mp3 file to ogg file by libopus codec.

  when I use it in my home directory it works using this command :

  ffmpeg -i music.mp3 -c libopus out.ogg

  but when I’m in this directory :

  /home/moein/Desktop/BeatkhorBot/music

  the command does not work and gives me this error :

  Invalid encoder type 'libopus'

  does anyone know how to fix this ?