I gather that ffmpeg "-vol" option is deprecated and ffmepg has new audio options, eg http://ffmpeg.mplayerhq.hu/ffmpeg-filters.html#volume
but neither googling nor the ffmpeg documentation show me how to use these new options (in windows) to normalize audio volume.
I hope someone can show me how to do something broadly along the lines:
Sample scripts and advice would be most welcome.
... if worst comes to worst, then I guess I will need to extract the audio and normalize in separate steps, similar to
http://superuser.com/questions/32311...o-using-ffmpeg
and
http://1024.gr/blog/normalize-audio-...nd-sox-windows
and use something this to recode/mux the video and normalized audio at the same time:
(I gather -map 0:v excludes the audio from the first input file, since we need to discard that un-normalized audio ?)
PS also, is this still true of the current version of ffmpeg ? :
http://ffmpeg.org/trac/ffmpeg/ticket/720
-af was never integrated in the main repository,
and using -vf for audio filters i evidently wrong,
so the only way to use audio filtering is through the lavfi input device.
You use it this way:
ffmpeg -f lavfi -i "amovie=INFILE,volume=0.1" OUTFILE
edit: http://forum.videohelp.com/threads/3...=1#post2209366 show -af works OK
PPS if anyone knows how to compress the audio range at the same time, some hints would be handy
- volumedetect
- volume=volume=+3.1dB
but neither googling nor the ffmpeg documentation show me how to use these new options (in windows) to normalize audio volume.
I hope someone can show me how to do something broadly along the lines:
Code:
ffmpeg -i a.mpg [audio parsing options to establish normalization value]
ffmpeg -i a.mpg [video conversion options] [audio conversion options] -af "volume=+[?normalization increase?]dB" out.mp4... if worst comes to worst, then I guess I will need to extract the audio and normalize in separate steps, similar to
http://superuser.com/questions/32311...o-using-ffmpeg
and
http://1024.gr/blog/normalize-audio-...nd-sox-windows
and use something this to recode/mux the video and normalized audio at the same time:
Code:
ffmpeg -i a.mpg -i a_normalized.wav -map 0:v -map 1:a [video conversion options] [audio conversion options] out.mp4PS also, is this still true of the current version of ffmpeg ? :
http://ffmpeg.org/trac/ffmpeg/ticket/720
Quote:
-af was never integrated in the main repository,
and using -vf for audio filters i evidently wrong,
so the only way to use audio filtering is through the lavfi input device.
You use it this way:
ffmpeg -f lavfi -i "amovie=INFILE,volume=0.1" OUTFILE
PPS if anyone knows how to compress the audio range at the same time, some hints would be handy
