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diff --git a/DOCS/pl/sound.html b/DOCS/pl/sound.html new file mode 100644 index 0000000000..3a3ebaca4b --- /dev/null +++ b/DOCS/pl/sound.html @@ -0,0 +1,292 @@ +<HTML> + +<HEAD> +<STYLE> + .text + {font-family : Verdana, Arial, Helvetica, sans-serif; + font-size : 14px;} +</STYLE> +</HEAD> + +<BODY BGCOLOR=white> + +<FONT CLASS="text"> + +<P><B><A NAME=2.3.2>2.3.2. Audio output devices</A></B></P> + +<P><B>MPlayer</B>'s audio interface is called <I>libao2</I>. It currently +contains these drivers:</P> + +<TABLE BORDER=0> + +<TR><TD COLSPAN=4><P><B><FONT CLASS="text">General:</B></P></TD></TR> + +<TR><TD> </TD><TD VALIGN=top><FONT CLASS="text">oss</TD><TD> </TD><TD><FONT CLASS="text">OSS (ioctl) driver</TD></TR> +<TR><TD></TD><TD VALIGN=top><FONT CLASS="text">sdl</TD><TD></TD><TD><FONT CLASS="text">SDL driver (supports up/downsampling, <B>ESD</B>, <B>ARTS</B> etc)</TD></TR> +<TR><TD></TD><TD VALIGN=top><FONT CLASS="text">nas</TD><TD></TD><TD><FONT CLASS="text">NAS (Network Audio System) driver</TD></TR> +<TR><TD></TD><TD VALIGN=top><FONT CLASS="text">alsa5</TD><TD></TD><TD><FONT CLASS="text">native ALSA 0.5 driver</TD></TR> +<TR><TD></TD><TD VALIGN=top><FONT CLASS="text">alsa9</TD><TD></TD><TD><FONT CLASS="text">native ALSA 0.9 driver (works, but has problems -> use OSS)</TD></TR> +<TR><TD></TD><TD VALIGN=top><FONT CLASS="text">sun</TD><TD></TD><TD><FONT CLASS="text">SUN audio driver (/dev/audio) for BSD and Solaris8 users</TD></TR> + +</TABLE> + +<P>Fact is, Linux sound card drivers have compatibility problems. +It <B>may</B> take a while to find your optimal settings.</P> + +<UL> +<LI>If you have an OSS driver, first try <CODE>-ao oss</CODE> (this is the default). +If you experience glitches, halts or anything out of the ordinary, try +<CODE>-ao sdl</CODE> (NOTE: you need to have SDL libraries and header files +installed). The SDL audio driver helps in a lot of cases and also supports ESD, +ARTS, and up/downsampling. (ESD is the sound daemon from GNOME, ARTS is from KDE.)</LI> +<LI>If you have ALSA version 0.5, then you almost always have to use <CODE>-ao alsa5</CODE> , +since ALSA 0.5 has buggy OSS emulation code, and will <B>crash MPlayer</B> with +a message like this:<BR> +<CODE>DEMUXER: Too many (945 in 8390980 bytes) video packets in the buffer!</CODE></LI> +<LI>If you have ALSA version 0.9 you may choose between <CODE>-ao oss</CODE> and +<CODE>-ao sdl</CODE>. You can also use <CODE>-ao alsa9</CODE>. It works, but +there are problems like lost sync and disappearing audio.</LI> +</UL> + +<P>On <B>Solaris/FreeBSD</B> systems, use the SUN audio driver with the +<CODE>-ao sun</CODE> option, otherwise neither video nor audio will work.</P> + +<P><B><A NAME=2.3.2.1>2.3.2.1. Sound Card experiences, recommendations</A></B></P> + +<TABLE BORDER=0 WIDTH="100%"> +<TR><TD COLSPAN=3><B><FONT CLASS="text">VIA onboard chipset (via82cxxx) 48kHz only</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">Driver:</TD><TD><FONT CLASS="text"> from <A HREF="http://sourceforge.net/project/showfiles.php?group_id=3242&release_id=59602">here</A></TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">Aureal Vortex 2</B></TD><TR> +<TD> </TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">no driver</TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS/Pro:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">no driver</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD>48</TD><TR> +<TD></TD><TD><FONT CLASS="text">Driver:</TD><TD><FONT CLASS="text"><A HREF="http://aureal.sourceforge.net">aureal.sourceforge.net</A></TD><TR> +<TD></TD><TD><FONT CLASS="text">Driver2:</TD><TD><FONT CLASS="text"> from <A HREF="http://makacs.poliod.hu/~pontscho/aureal/au88xx-1.1.3.tar.bz2">here</A><BR> +(<I>buffer size increased to 32k</I>)</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">GUS PnP</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">no driver</TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS/Pro:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">48</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">SB Live!</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">Analog OK, SP/DIF not working</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">Both OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">192</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">SB AWE 64</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">max 44kHz</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">48kHz sounds bad</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">48</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">Gravis UltraSound ACE</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">not OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">44</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">Gravis UltraSound MAX</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK (?)</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">48</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">ESS 688</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK (?)</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">48</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">C-Media cards (which ones?)</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">not OK (hissing) (?)</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK (?)</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">?</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">Yamaha cards (*ymf*)</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">not OK (?) (maybe <CODE>-ao sdl</CODE>)</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">OK only with ALSA 0.5 with OSS emulation <B>AND</B> <CODE>-ao sdl</CODE> (!) (?)</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">?</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">Cards with envy24 chips (like Terratec EWS88MT)</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">?</TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS/Pro:</TD><TD><FONT CLASS="text">OK</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">?</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">?</TD><TR> + +<TD COLSPAN=3><B><FONT CLASS="text">PC Speaker or DAC</B></TD><TR> +<TD></TD><TD><FONT CLASS="text">OSS:</TD><TD><FONT CLASS="text">OK (Use the SDL driver: <CODE>-ao sdl</CODE>)</TD><TR> +<TD></TD><TD><FONT CLASS="text">ALSA:</TD><TD><FONT CLASS="text">no driver</TD><TR> +<TD></TD><TD><FONT CLASS="text">Max kHz:</TD><TD><FONT CLASS="text">The driver emulates 44.1, maybe more.</TD><TR> +<TD></TD><TD><FONT CLASS="text">Driver:</TD><TD><FONT CLASS="text"><A HREF="ftp://ftp.infradead.org/pub/pcsp">ftp://ftp.infradead.org/pub/pcsp</A></TD> +</TABLE> + +<UL> +<LI>On Linux, a 2.4.x kernel is highly recommended. Kernel 2.2 is not tested.</LI> +<LI>If sound clicks when playing from CD-ROM, turn on IRQ unmasking, e.g. + <CODE>hdparm -u1 /dev/cdrom</CODE> (<CODE>man hdparm</CODE>). This is + generally beneficial and described more detailed in the + <A HREF="cd-dvd.html#4.1">CD-ROM section</A>.</LI> +<LI>Sharing your sound card with another application like XMMS is <B>strongly discouraged</B>! + If the other sound application is using ESD, start <B>MPlayer</B> with the <CODE>-vo sdl:esd</CODE> option + to combine both sound streams! In fact, the option <CODE>-vo sdl:esd</CODE> could be used with ESD + even when playing <B>Mplayer</B> alone.</LI> +<LI>Feedback to this document is welcome. Please tell us how <B>MPlayer</B> and + your sound card(s) worked together.</LI> +</UL> + + +<P><B><A NAME=2.3.2.2>2.3.2.2. Audio plugins</A></B></P> + +<P><B>MPlayer</B> has support for audio plugins. Audio plugins can be used for + changing the properties of the audio data before the sound reaches the sound + card. They are enabled using the <CODE>-aop</CODE> switch which takes a + <CODE>list=plugin1,plugin2,...</CODE> argument. The <CODE>list</CODE> argument + is required and determines which plugins should be used and in which order they + should be executed. Example: +</P> + +<P> <CODE>mplayer media.avi -aop list=resample,format</CODE></P> + +<P>would run the sound through the resampling plugin followed by the format + plugin. +</P> + +<P>The plugins can also have switches that change their behavior. These + switches are explained in detail in the sections below. A plugin will execute + using default settings if its switches are omitted. Here is an example of how + to use plugins in combination with plugin specific switches: +</P> + +<P> <CODE>mplayer media.avi -aop + list=resample,format:fout=44100:format=0x8</CODE> +</P> + +<P>would set the output frequency of the resample plugin to 44100Hz and the + output format of the format plugin to AFMT_U8. +</P> + +<P>Currently audio plugins can not be used in <B>MEncoder</B>.</P> + + +<P><B><A NAME=2.3.2.2.1>2.3.2.2.1. Up/Downsampling</A></B></P> + +<P><B>MPlayer</B> fully supports up/downsampling of the sound. This plugin can + be used if you have a fixed frequency sound card or if you are + stuck with an old sound card that is only capable of max 44.1kHz. + Limitations in your hardware are not auto detected, so you have to specify + the sample frequency explicitly. This plugin has one switch: + <CODE>fout</CODE> which is used for setting the desired output sample + frequency. It defaults to 48kHz, and is given in + <Hz>. +</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop list=resample:fout=<required + frequency in Hz, like 44100></CODE></P> + +<P>Note that the output frequency should not be scaled up from the default value. + Scaling up will cause the audio and video streams to be played in slow motion + in addition to audio distortion.</P> + +<P><B><A NAME=2.3.2.2.2>2.3.2.2.2. Surround Sound decoding</A></B></P> + +<P><B>MPlayer</B> has an audio plugin that can decode matrix encoded +surround sound. Dolby Surround is an example of a matrix encoded format. +Many files with 2 channel audio actually contain matrixed surround sound. +To use this feature you need a sound card supporting at least 4 channels.</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop list=surround</CODE></P> + + +<P><B><A NAME=2.3.2.2.3>2.3.2.2.3. Sample format converter</A></B></P> + +<P>If your sound card driver does not support signed 16bit <CODE>int</CODE> data type, + this plugin can + be used to change the format to one which your sound card can understand. It + has one switch, <CODE>format</CODE>, which can be set to one of the numbers + found in <CODE>libao2/afmt.h</CODE>. This plugin is hardly ever needed and is + intended for advanced users. Keep in mind that this plugin only changes the + sample format and not the sample frequency or the number of channels. +</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop + list=format:format=<required output format></CODE> +</P> + + +<P><B><A NAME=2.3.2.2.4>2.3.2.2.4. Delay</A></B></P> + +<P>This plugin delays the sound and is intended as an example of how to develop + new plugins. It can not be used for anything useful from a users perspective + and is mentioned here for the sake of completeness only. Do not use this + plugin unless you are a developer.</P> + +<P><B><A NAME=2.3.2.2.5>2.3.2.2.5. Software volume control</A></B></P> + +<P>This plugin is a software replacement for the volume control, and + can be used on machines with a broken mixer device. It can also be + used if one wants to change the output volume of <B>MPlayer</B> + without changing the PCM volume setting in the mixer. It has one + switch <CODE>volume</CODE> that is used for setting the initial + sound level. The initial sound level can be set to values between 0 + and 255 and defaults to 101 which equals 0dB amplification. Use this + plugin with caution since it can reduce the signal to noise ratio of + the sound. In most cases it is best to set the level for the PCM + sound to max, leave this plugin out and control the output level to + your speakers with the master volume control of the mixer. If there is an + external amplifier connected to the computer (this is almost always + the case), the noise level can be minimized by adjusting the master + level and the volume knob on the amplifier until the hissing noise + in the background is gone. +</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop + list=volume:volume=<0-255></CODE> +</P> + +<P>This plugin also has compressor or "soft-clipping" capabilities. + Compression can be used if the dynamic range of the sound is very + high or if the dynamic range of the loudspeakers is very + low. Be aware that this feature creates distortion and should be + considered a last resort. +</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop + list=volume:softclip</CODE> +</P> + + +<P><B><A NAME=2.3.2.2.6>2.3.2.2.6. Extrastereo</A></B></P> + +<P>This plugin (linearly) increases the difference between left and right + channels (like the XMMS extrastereo plugin) which gives some sort of "live" + effect to playback. +</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop list=extrastereo</CODE><BR> + <CODE>mplayer media.avi -aop list=extrastereo:mul=3.45</CODE></P> + +<P>The default coefficient (<CODE>mul</CODE>) is a float number that defaults + to 2.5. If you set it to 0.0, you will have mono sound (average of both + channels). If you set it to 1.0, sound will be unchanged.</P> + + +<P><B><A NAME=2.3.2.2.7>2.3.2.2.7. Volume normalizer</A></B></P> + +<P>This plugin maximizes the volume without distorting the sound.</P> + +<P>Usage:<BR> + <CODE>mplayer media.avi -aop list=volnorm</CODE><BR> + + +<P><B><A NAME=2.3.2.2.8>2.3.2.2.8. Surround</A></B></P> + +<P>Someone should document something, sometime.</P> + +</BODY> +</HTML> |