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MPlayer
https://mplayerhq.hu/DOCS/man/en/mplayer.1.html
AUDIO OUTPUT OPTIONS (MPLAYER ONLY) -abs (-ao oss only) (OBSOLETE) Override audio driver/card buffer size detection.-format (also see the format audio filter) Select the sample format used for output from the audio filter layer to the sound card. The values that can adopt are listed below in the description of the format audio filter.-mixer
ffmpeg noise filter usage based on mplayer noise settings ...
https://forum.videohelp.com/threads/372482-ffmpeg-noise-filter-usage-based-on-mplayer-noise-settings
Available values for component flags are: ‘a’ averaged temporal noise (smoother) ‘p’ mix random noise with a (semi)regular pattern ‘t’ temporal noise (noise pattern changes between frames) ‘u’ uniform noise (gaussian otherwise) atm. I would guess that. - mplayer "noise=5t:5t", would map to ffmpeg "noise=alls=5:allf=t".
3.11. Software Volume adjustment - MPlayer
http://www.mplayerhq.hu/DOCS/HTML/en/advaudio-volume.html
The -softvol option works by controlling the volume audio filter. If you want to play a file at a certain volume from the beginning you can specify volume manually: mplayer quiet-file-af volume=10. This will play the file with a ten decibel gain. Be careful when using the volume filter - you could easily hurt your ears if you use too high a value. Start low and work your way up …
New Filter - MPlayerNoise - Doom9's Forum
https://forum.doom9.org/showthread.php?t=84181
Posts: 76. New Filter - MPlayerNoise. I have created this filter, because i like the ffdshow noise filter on movies with low bitrate in combination with postprocessing. Now i bought a DVD burner and want a little bit of noise on upsized DVB captures. Values of 2 to 4 on the Y plane look very well.
MPlayer(1) manual page - SourceForge
http://tivo-mplayer.sourceforge.net/docs/mplayer-man.html
-af-adv <force=(0-3):list=(filters)> (see -af option too) Specify advanced audio filter options: force=<0-3> Forces the insertion of audio filters to one of the following: 0: Completely automatic insertion of filters (default) 1: Optimize for speed 2: Optimize for accuracy 3: Turn off auto list=<filters> Same as -af (see -af option).
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