VideoHelp Forum

+ Reply to Thread
Results 1 to 4 of 4
Thread
  1. Member
    Join Date
    Nov 2011
    Location
    chicago
    Search PM
    ffplay -af "volumedetect" shows a max volume of 21.0 recommendation while ffmpeg shows a recommendation of 8.2db
    both programs are at the same version/levels. both run against the same input mvk file.
    The original file is notably low volume, so Id like to increase it. Any reason why the different numbers? Which number should I use?
    Quote Quote  
  2. Member
    Join Date
    Mar 2008
    Location
    United States
    Search Comp PM
    this filter in ffplay displays max and average volume.
    These levels are shown in the usual -dB notation
    Image Attached Thumbnails Click image for larger version

Name:	vd.png
Views:	23
Size:	43.3 KB
ID:	59592  

    Quote Quote  
  3. Member
    Join Date
    Nov 2011
    Location
    chicago
    Search PM
    Correct. Using ffmpeg -i %1 -af "volumedetect" -f null NUL
    and
    ffplay -i %1 -af "volumedetect"

    with the same input file shows the same output levels in the usual -dB notation but with different output -dB values. WHY? Which is the correct?
    Quote Quote  
  4. Member
    Join Date
    Mar 2008
    Location
    United States
    Search Comp PM
    I get the same numbers
    Image Attached Thumbnails Click image for larger version

Name:	ff1.png
Views:	22
Size:	68.4 KB
ID:	59605  

    Quote Quote  



Similar Threads