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debian - mplayer couldn't find audio filter 'resample ...
https://unix.stackexchange.com/questions/186202/mplayer-couldnt-find-audio-filter-resample
The mplayer command that causes this error is this: mplayer -slave -identify -noframedrop -nojoystick -nolirc -vo \ yuv4mpeg:file=/tmp/.movie-to-dvd.12234.yuv -channels 2 -ao \ pcm:waveheader:file=/tmp/.movie-to-dvd.12234.wav -af \ resample=46034:0:2,volnorm -osdlevel 0 -zoom -vf scale=720:576,harddup \ -- movie.mp4
[ubuntu] Mplayer...seek failed error? [Archive] - Ubuntu ...
https://ubuntuforums.org/archive/index.php/t-1291926.html
Trying filter chain: vo Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] SwScale params: -1 x -1 (-1=no scaling) Trying filter chain: scale vo The selected video_out device is incompatible with this codec. Try appending the scale filter to your filter list, e.g. -vf spp,scale instead of -vf spp.
Chapter 8. Frequently Asked Questions - MPlayer
http://www.mplayerhq.hu/DOCS/HTML/en/faq.html
A: This can have multiple reasons. Your CPU and/or video card and/or bus is too slow. MPlayer displays a message if this is the case (and the dropped frames counter goes up fast). If it is an AVI, maybe it has bad interleaving, try the -ni option to work around this. Or it may have a bad header, in this case -nobps and/or -mc 0 can help.
3.10. Channel manipulation - MPlayer
http://www.mplayerhq.hu/DOCS/HTML/en/advaudio-channels.html
Audio files that truly have one channel are automatically played through two speakers; unfortunately, most files with mono sound are actually encoded as stereo with one channel silent. The easiest and most foolproof way to make both speakers output the same audio is the extrastereo filter: mplayer filename-af extrastereo=0
Do mplayer's audio filters contain the opposite of ...
https://unix.stackexchange.com/questions/77244/do-mplayers-audio-filters-contain-the-opposite-of-karaoke-mode
A friend showed me mplayer's Karaoke mode (-af karaoke), and I was blown away by how good it is on the majority of the tracks I threw at it.Instead of tweaking the 10-band EQ, is there an audio filter for the opposite of Karaoke Mode? Specifically, is there an audio filter that would allow me to "extract the vocals" and filter out the music?
MPlayer OS X / Discussion / Help: real media support
https://sourceforge.net/p/mplayerosx/discussion/212431/thread/10e58274/
Opening audio decoder: [realaud] RealAudio decoder opening shared obj '/usr/local/lib/mplayer/' mplayer: can't map file: /usr/local/lib/mplayer/ ((os/kern) invalid argument) Error: dlcompat: object file setup failure ERROR: Could …
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