[MPlayer-users] Noise at beginning of some MP3 files

[Timo Teifel]

Hi,

I use mplayer as Movie- and MP3 Player. 

When played with mplayer, some of my mp3's begin always 
with about half a second very loud noise, then they get
played perfectly.
Other mp3 Players play them without that noise.
This happens only with a few files, not with all. 

I uploaded a sample file named mp3_noise.mp3

This happens with MPlayer 0.90-RC2 and RC4. Current CVS doesn't
compile/link on my computer:
mplayer.o(.data+0x22d4): undefined reference to `readPPOpt'
mplayer.o(.data+0x22e8): undefined reference to `revertPPOpt'
mplayer.o(.data+0x2328): undefined reference to `pp_help'
libmpcodecs/libmpcodecs.a(vf.o)(.data+0x30): undefined reference to 
`vf_info_pp'
collect2: ld returned 1 exit status
make: *** [mplayer] Error 1

That's why I didn't test it with latest CVS. Sorry...

Also the noise is there on different computers, so I suppose it isn't
hard-/software specific...

Anyway, here the output of mplayer -v:
-----------------------
Using GNU internationalization
Original domain: messages
Original dirname: /usr/share/locale
Current domain: mplayer
Current dirname: /usr/local/share/locale


MPlayer 0.90rc4-3.2 (C) 2000-2003 Arpad Gereoffy (see DOCS)

CPU: Advanced Micro Devices Athlon TB Thunderbird (Family: 6, Stepping: 2)
Detected cache-line size is 64 bytes
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx

Reading config file /usr/local/etc/mplayer/mplayer.conf
Reading config file /home/tt/.mplayer/config
Reading /home/tt/.mplayer/codecs.conf: 50 audio & 135 video codecs
CommandLine: '20 Death Of The Beast & Destruction Of The Black Fortress.mp3' 
'-v'
get_path('font/font.desc') -> '/home/tt/.mplayer/font/font.desc'
Font /home/tt/.mplayer/font/font.desc loaded successfully! (206 chars)
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
Using Linux hardware RTC timing (1024Hz).
get_path('input.conf') -> '/home/tt/.mplayer/input.conf'
Parsing input config file /home/tt/.mplayer/input.conf
Input config file /home/tt/.mplayer/input.conf parsed : 52 binds
Setting up LIRC support...
get_path('20 Death Of The Beast & Destruction Of The Black Fortress.mp3.conf') 
-> '/home/tt/.mplayer/20 Death Of The Beast & Destruction Of The Black 
Fortress.mp3.conf'

Playing 20 Death Of The Beast & Destruction Of The Black Fortress.mp3
Not an URL!
File size is 845824 bytes
CACHE_PRE_INIT: 0 [0] 0  pre:0  eof:0
Cache fill:  2.52% (845824 bytes)    Checking for YUV4MPEG2
DEMUXER: freeing demuxer at 0x8464b88
ASF_check: not ASF guid!
DEMUXER: freeing demuxer at 0x8464b88
Checking for NuppelVideo
DEMUXER: freeing demuxer at 0x8464b88
Checking for REAL
DEMUXER: freeing demuxer at 0x8464b88
Checking for SMJPEG
DEMUXER: freeing demuxer at 0x8464b88
Searching demuxer type for filename 20 Death Of The Beast & Destruction Of The 
Black Fortress.mp3 ext: .mp3
Trying demuxer 17 based on filename extension
==> Found audio stream: 0
demux_audio: audio data 0x19E - 0x0
Audio file detected.
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
dec_audio: Allocating 4608 + 65536 = 70144 bytes for output buffer
mp3lib: made decode tables with MMX optimization
mp3lib: using 3DNow!Ex optimized decore!
MP3lib: init layer2&3 finished, tables done
MPEG 1.0, Layer III, 44100 Hz 128 kbit Stereo, BPF: 418
Channels: 2, copyright: No, original: Yes, CRC: No, emphasis: 0
AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 16000->176400 (128.0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
Checking audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
[libaf] Adding filter dummy
[dummy] Was reinitialized, rate=44100Hz, nch = 2, format = 0x00000001 and bps 
= 2
AF_pre: af format: 2 bps, 2 ch, 44100 hz, little endian signed int
AF_pre: 44100Hz 2ch Signed 16-bit (Little-Endian)
ao2: 44100 Hz  2 chans  Signed 16-bit (Little-Endian)
audio_setup: using '/dev/dsp' dsp device
audio_setup: sample format: Signed 16-bit (Little-Endian) (requested: Signed 
16-bit (Little-Endian))
audio_setup: using 2 channels (requested: 2)
audio_setup: using 44100 Hz samplerate (requested: 44100)
audio_setup: frags:  16/16  (4096 bytes/frag)  free:  65536
AO: [oss] 44100Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
AO: Description: OSS/ioctl audio output
AO: Author: A'rpi
Building audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
[dummy] Was reinitialized, rate=44100Hz, nch = 2, format = 0x00000001 and bps 
= 2
[dummy] Was reinitialized, rate=44100Hz, nch = 2, format = 0x00000001 and bps 
= 2
Video: no video
Freeing 0 unused video chunks
Starting playback...
Uninit audio filters...
[libaf] Removing filter dummy
uninit audio: mp3lib
DEMUXER: freeing demuxer at 0x8465528
DEMUXER: freeing sh_audio at 0x8465ec8
vo: x11 uninit called but X11 not inited..

Exiting... (Quit)
------------------------

My system is Redhat 8, Kernel 2.4.20, KDE 3.05
using oss output with a Soundblaster Live 5.1

If you have any further questions, send me an email!

Thanks!
Timo