On Saturday 1 Apr 2017 23:51 CEST, Moritz Barsnick wrote: > On Sat, Apr 01, 2017 at 23:41:21 +0200, Cecil Westerhof wrote: >>> You can use then use that value for the volume filter - note the >>> "dB" syntax: >>> >>> $ ffmpeg -y -i speaker.MP4 -vcodec copy -af volume="7.7 dB" >>> speakerAudioInc.MP4 >> >> Almost all give 0.0 dB (12), or -0.0 dB (4). When using that there >> will change nothing. Or am I overlooking something? >> There is also a -0.4 dB and a -0.2 dB. > > 0 dB change indeed means no change (it's a logarithmic scale - sorry > if that's too mathematical for you). In other words, the loudest > parts of the file are already at maximum, and raising their volume > will introduce clipping, what could be perceived as distortion.
That sounds quit weird to me, because everything was very subdued in my opinion. > Apparently, even at "volume=3", it's not noticable to you yet, at > "volume=4" it is. At volume=3 I do not hear distortions. At volume=4 a lot. But maybe I am just to tired: it was an enervating day after an enervating week. > Did you try dynaudnorm? If "volume=3" isn't good enough for you, it > could be a better solution. > https://ffmpeg.org/ffmpeg-filters.html#dynaudnorm I am already uploading one. (One person could not wait to see how she performed.) I will look into your suggestion tomorrow. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
