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[simoncn]

(03-01-2016 03:13)Mihaylov Wrote:  Whether it is possible to add an option +6 db of the volume level to the mode of conversion dsf:wav, for example, so: dsf:wav+6db. In the ffmpeg options there is vol key.

If this is supported by ffmpeg, you should be able to do it by using the convOut option of the stream.options property.