On 3/30/18, Martin Vignali <martin.vign...@gmail.com> wrote: > Hello, > > After discussion in user mailing list, > several patchs, trying to fix various "issue" with showvolume filter > > A wav example can be found here (1000 hz with -12 db, then -18 db then 0 > db) : > https://we.tl/X6L69kEWAN > > Command line to test (vertical) > ./ffmpeg -i inputFile.wav -filter_complex > "[0:a]showvolume=w=340:h=5:o=v:f=1.:p=1.:t=0:m=p:v=0[v]" > -map "[v]" -c:v qtrle resAudioMeter004.mov > > Command line to test (horizontal) > ./ffmpeg -i inputFile.wav -filter_complex > "[0:a]showvolume=w=340:h=5:o=h:f=1.:p=1.:t=0:m=p:v=0[v]" > -map "[v]" -c:v qtrle resAudioMeter004.mov > > > > 001 : add comments to help to remember the orientation value inside func > > 002 : calculate fade only if fade option is not set to 1. > 003 : indent > > 004 : clear buffer at each frame (not sure it's the best way to fix) > with this patch the wav sample at the start of this email, show a correct > audio meter > (the -18 db part of the wav, is correctly display) > 005 : indent > > 006 : use another scale for display (some kind of log scale), more close to > a classic audio meter display. IMHO, it's better, but if need, i will add > and option, for choosing the scale display. > > 007 : Fix doc, for orientation parameter (possible value are h or v, not > horizontal or vertical) > > > I think the result of rms mode is still not right, but need more work. > > Comments welcome > > Martin >
I applied what I considered useful. For different scale, please implement it as another option. Just use f=0 if you want instant output without fading. With some of your patches this option wouldn no longer do anything. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
