convolution with acourate fir filter

[SMSWAP]

(09-12-2018 13:52)Alandbush Wrote:  

(09-12-2018 10:36)SMSWAP Wrote:  /share/CACHEDEV1_DATA/.qpkg/ffmpeg/ffmpeg

seems to be the newly installed 4.x FFMPEG version.

NOW, it saves without an error, BUT it still doesn't convolute the file

This is how stream.options currently looks like:
convOut=-i /share/CACHEDEV1_DATA/Music/ConvolutionFiles/Echo44.wav

You can definitively confirm the version of ffmpeg being invoked by use of the following command.

-version

Your convout command should also be suffixed with the following to invoke convolution.

-lavfi afir

You might find this Ffmpeg documentation page useful as well.

Having said all of that, convolution can have a subtle effect on the audio file and you have not hinted at the type of convolution that you are applying. Perhaps, to remove any doubt, you could generate a convolution filter with an obvious effect, e.g. extreme high pass or low pass.

Hi Alan,

I am currently using the following command:

convOut=-i /share/CACHEDEV1_DATA/Music/ConvolutionFiles/Echo44.wav -lavfi afir

So in that respect this should work as expected. The version is confirmed, but maybe the QKPG one doesn't work properly. However, I am lost finding the right FFMPEG to install manually in the default folder /mnt/ext/opt/ffmpeg/usr/bin/ffmpeg.

The should actually introduce a very audible echo, which it doesn't... You are right, I could try it with a more drastic example like high pass or low pass.