From 6f6ba55b51d52e4e4ef46f303e6ec8bcfd193dd3 Mon Sep 17 00:00:00 2001 From: nell Date: Fri, 10 May 2002 11:17:41 +0000 Subject: refresh and charset settings git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6041 b3059339-0415-0410-9bf9-f77b7e298cf2 --- DOCS/Polish/sound.html | 381 ++++++++++++++++++++++++++++++++++--------------- 1 file changed, 265 insertions(+), 116 deletions(-) (limited to 'DOCS/Polish/sound.html') diff --git a/DOCS/Polish/sound.html b/DOCS/Polish/sound.html index 6e067c6bb8..3a3ebaca4b 100644 --- a/DOCS/Polish/sound.html +++ b/DOCS/Polish/sound.html @@ -1,143 +1,292 @@ + + + + + - + -

MPlayer's audio interface is called libao2. It currently -contains these drivers :

+contains these drivers:

- + - - - - - - + + + + + +

General:
General:
	oss	OSS (ioctl) driver
	sdl	SDL driver (supports up/downsampling, ESD, ARTS etc)
	nas	NAS (Network Audio System) driver
	alsa5	native ALSA 0.5 driver
	alsa9	native ALSA 0.9 driver (works, but has problems -> use OSS)
	sun	SUN audio driver (/dev/audio) for BSD and Solaris8 users
	oss	OSS (ioctl) driver
	sdl	SDL driver (supports up/downsampling, ESD, ARTS etc)
	nas	NAS (Network Audio System) driver
	alsa5	native ALSA 0.5 driver
	alsa9	native ALSA 0.9 driver (works, but has problems -> use OSS)
	sun	SUN audio driver (/dev/audio) for BSD and Solaris8 users

The fact is, Linux soundcard drivers are usually bad, and always as -incompatible as they can be. It MAY take a while to find your optimal settings.

if you have OSS as driver, first try with -ao oss (this is the default). -If you experience glitches, halts or anything out of the ordinary, have a -look at -ao sdl (NOTE: of course you'll have to have a new SDL library and its -devel pair installed). It helps in a lot of cases (it also supports ESD, ARTS, and -up/downsampling. /esd is GNOME's, arts is KDE's sound daemon/).
if you have ALSA version 0.5, then you ALMOST always have to use -ao alsa5 , -since 0.5 has buggy OSS emulation code, and will crash MPlayer with +
Fact is, Linux sound card drivers have compatibility problems. +It may take a while to find your optimal settings.
+ +
- If you have an OSS driver, first try -ao oss (this is the default). +If you experience glitches, halts or anything out of the ordinary, try +-ao sdl (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.)
- If you have ALSA version 0.5, then you almost always have to use -ao alsa5 , +since ALSA 0.5 has buggy OSS emulation code, and will crash MPlayer with a message like this:
  -
  -
- if you have ALSA version 0.9, use -ao oss or -ao sdl as you -wish. You can also use -ao alsa9 as it works now, however it has many -problems (losing sync, disappearing audio, etc).
+DEMUXER: Too many (945 in 8390980 bytes) video packets in the buffer!
If you have ALSA version 0.9 you may choose between -ao oss and +-ao sdl. You can also use -ao alsa9. It works, but +there are problems like lost sync and disappearing audio.

On Solaris/FreeBSD systems, use the SUN audio driver with the --ao sun option, otherwise you'll have no video, nor audio playing.

+-ao sun option, otherwise neither video nor audio will work.

2.3.2.1. Soundcard experiences, recommendations

2.3.2.1. Sound Card experiences, recommendations

- - +
VIA onboard chipset (via82cxxx) 48Khz only
Driver: from here
+ + - - - - - - - + + + + + + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
VIA onboard chipset (via82cxxx) 48kHz only
Driver: from here
Aureal Vortex 2
OSS: no driver
OSS/Pro: OK
ALSA: no driver
Max kHz: 48
Driver: aureal.sourceforge.net
Driver2: from here
+ Aureal Vortex 2
OSS: no driver
OSS/Pro: OK
ALSA: no driver
Max kHz: 48
Driver: aureal.sourceforge.net
Driver2: from here
(buffer size increased to 32k)
GUS PnP
OSS: no driver
OSS/Pro: OK
ALSA: OK
Max kHz: 48
SB Live!
OSS: OK
ALSA: (?)
Max kHz: 48
SB AWE 64
OSS: max 44kHz
ALSA: 48kHz sounds shit
Max kHz: 48
Gravis UltraSound ACE
OSS: max 44Khz. not OK
ALSA: OK
Max kHz: 48
Gravis UltraSound MAX
OSS: OK
ALSA: OK (?)
Max kHz: 48
ESS 688
OSS: OK
ALSA: OK (?)
Max kHz: 48
C-Media cards (which ones?)
OSS: not OK (hissing) (?)
ALSA: OK (?)
Max kHz: ?
Yamaha cards (*ymf*)
OSS: not OK (?) (maybe -ao sdl)
ALSA: OK only with ALSA 0.5 with OSS emulation AND -ao sdl (!) (?)
Max kHz: ?
Cards with envy24 chips (like Terratec EWS88MT)
OSS: ?
OSS/Pro: OK
ALSA: ?
Max kHz: ?
PC Speaker or DAC
OSS: OK (use the SDL driver : -ao sdl)
ALSA: no driver
Max kHz: the driver emulates 44.1 maybe more
Driver: ftp://ftp.infradead.org/pub/pcsp

- -

on Linux, use at least kernel 2.4 if possible, 2.2 isn't tested -
if sound clicks when playing from CD-ROM, turn on IRQ unmasking ! - for example "hdparm -u1 /dev/cdrom" (see "man hdparm" !!!) - This is recommended anyways... (for XMMS, etc...) - Read section 4.1. -
don't use your soundcard by other application ( for ex. XMMS ) ! - if you use ESD, start MPlayer with the '-vo sdl:esd' option ! -
Please tell us how MPlayer and your soundcard(s) worked together! -

- - -

2.3.2.2. Audio plugins

- -

2.3.2.2.1. Up/Downsampling

- -

MPlayer fully supports up/downsampling of audio stream. -It is not autodetected, so you have to specify it explicitly even when -for example you have a max 44.1Khz capable soundcard, and the audio -is 48Khz. Also, this functionality is currently unimplemented in -MEncoder.

- -

Usage :
+GUS PnP +OSS:no driver +OSS/Pro:OK +ALSA:OK +Max kHz:48 + +SB Live! +OSS:Analog OK, SP/DIF not working +ALSA:Both OK +Max kHz:192 + +SB AWE 64 +OSS:max 44kHz +ALSA:48kHz sounds bad +Max kHz:48 + +Gravis UltraSound ACE +OSS:not OK +ALSA:OK +Max kHz:44 + +Gravis UltraSound MAX +OSS:OK +ALSA:OK (?) +Max kHz:48 + +ESS 688 +OSS:OK +ALSA:OK (?) +Max kHz:48 + +C-Media cards (which ones?) +OSS:not OK (hissing) (?) +ALSA:OK (?) +Max kHz:? + +Yamaha cards (*ymf*) +OSS:not OK (?) (maybe -ao sdl) +ALSA:OK only with ALSA 0.5 with OSS emulation AND -ao sdl (!) (?) +Max kHz:? + +Cards with envy24 chips (like Terratec EWS88MT) +OSS:? +OSS/Pro:OK +ALSA:? +Max kHz:? + +PC Speaker or DAC +OSS:OK (Use the SDL driver: -ao sdl) +ALSA:no driver +Max kHz:The driver emulates 44.1, maybe more. +Driver:ftp://ftp.infradead.org/pub/pcsp + + +

On Linux, a 2.4.x kernel is highly recommended. Kernel 2.2 is not tested.

If sound clicks when playing from CD-ROM, turn on IRQ unmasking, e.g. + hdparm -u1 /dev/cdrom (man hdparm). This is + generally beneficial and described more detailed in the + CD-ROM section.

Sharing your sound card with another application like XMMS is strongly discouraged! + If the other sound application is using ESD, start MPlayer with the -vo sdl:esd option + to combine both sound streams! In fact, the option -vo sdl:esd could be used with ESD + even when playing Mplayer alone.

Feedback to this document is welcome. Please tell us how MPlayer and + your sound card(s) worked together.

+ + +

2.3.2.2. Audio plugins

+ +

MPlayer 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 -aop switch which takes a + list=plugin1,plugin2,... argument. The list argument + is required and determines which plugins should be used and in which order they + should be executed. Example: +

+ +

mplayer media.avi -aop list=resample,format

+ +

would run the sound through the resampling plugin followed by the format + plugin. +

+ +

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: +

+ +

mplayer media.avi -aop + list=resample,format:fout=44100:format=0x8 +

+ +

would set the output frequency of the resample plugin to 44100Hz and the + output format of the format plugin to AFMT_U8. +

+ +

Currently audio plugins can not be used in MEncoder.

+ + +

2.3.2.2.1. Up/Downsampling

+ +

MPlayer 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: + fout which is used for setting the desired output sample + frequency. It defaults to 48kHz, and is given in + <Hz>. +

+ +

Usage:
mplayer media.avi -aop list=resample:fout=<required frequency in Hz, like 44100>

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.

+ +

2.3.2.2.2. Surround Sound decoding

+ +

MPlayer 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.

+ +

Usage:
+ mplayer media.avi -aop list=surround

+ + +

2.3.2.2.3. Sample format converter

+ +

If your sound card driver does not support signed 16bit int data type, + this plugin can + be used to change the format to one which your sound card can understand. It + has one switch, format, which can be set to one of the numbers + found in libao2/afmt.h. 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. +

+ +

Usage:
+ mplayer media.avi -aop + list=format:format=<required output format> +

+ + +

2.3.2.2.4. Delay

+ +

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.

+ +

2.3.2.2.5. Software volume control

+ +

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 MPlayer + without changing the PCM volume setting in the mixer. It has one + switch volume 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. +

+ +

Usage:
+ mplayer media.avi -aop + list=volume:volume=<0-255> +

+ +

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. +

+ +

Usage:
+ mplayer media.avi -aop + list=volume:softclip +

+ + +

2.3.2.2.6. Extrastereo

+ +

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. +

+ +

Usage:
+ mplayer media.avi -aop list=extrastereo
+ mplayer media.avi -aop list=extrastereo:mul=3.45

+ +

The default coefficient (mul) 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.

+ + +

2.3.2.2.7. Volume normalizer

+ +

This plugin maximizes the volume without distorting the sound.

+ +

Usage:
+ mplayer media.avi -aop list=volnorm
+ + +

2.3.2.2.8. Surround

+ +

Someone should document something, sometime.

-- cgit v1.2.3

VIA onboard chipset (via82cxxx) 48Khz only
	Driver:	from here