[MPlayer-users] MP3 playback: bleep at start

ACS adrian.bacon at xs4all.nl
Sun Feb 5 15:45:47 CET 2006


I just noticed about 1 out of 30 of my MP3s give a bleep at start of 
decoding.
To me it's obvious the problem is in mp3 decoder/demuxer and not in 
soundcard output interface:
-This error is reproducible on both my htpc (geexbox MPlayer 
dev-CVS-051213-22:) as well as on my desktop (latest cvs:MPlayer 
dev-CVS-060205-14:)

On an older mplayer version (MPlayer 1.0pre6-3.3.4 ), I do not have this 
problem.
Also other linux players (xmms and VLC) and MS-based winamp have no trouble 
playing these files

I already tried overruling the demuxer auto settings without improvement:
-demuxer 17 -rawaudio format=0x55

If required, I can upload the start of 3 trouble mp3s for testing (tell me 
where)

Find below the commandline output. I already compared versus output for 
normal file and didn't find any clues



root at elite16:/root/cvs/main# ./mplayer -v  /mnt/m/video/test/berlin.mp3
MPlayer dev-CVS-060205-14:33-4.0.2 (C) 2000-2006 MPlayer Team
CPU: Intel Pentium 4/Celeron 4 Northwood; Pentium 4 EE/Xeon 
Prestonia,Gallatin (Family: 15, Stepping: 4)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2


get_path('codecs.conf') -> '/home/pvgelderen/.mplayer/codecs.conf'
Reading /home/pvgelderen/.mplayer/codecs.conf: Can't open 
'/home/pvgelderen/.mplayer/codecs.conf': No such file or directory
Reading /usr/local/etc/mplayer/codecs.conf: Can't open 
'/usr/local/etc/mplayer/codecs.conf': No such file or directory
Using built-in default codecs.conf.
CommandLine: '-v' '/mnt/m/video/test/berlin.mp3'
init_freetype
get_path('font/font.desc') -> '/home/pvgelderen/.mplayer/font/font.desc'
font: can't open file: /home/pvgelderen/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
Using Linux hardware RTC timing (1024Hz).
get_path('input.conf') -> '/home/pvgelderen/.mplayer/input.conf'
Can't open input config file /home/pvgelderen/.mplayer/input.conf: No such 
file or directory
Can't open input config file /usr/local/etc/mplayer/input.conf: No such file 
or directory
Falling back on default (hardcoded) input config
get_path('berlin.mp3.conf') -> '/home/pvgelderen/.mplayer/berlin.mp3.conf'
Playing /mnt/m/video/test/berlin.mp3.
get_path('sub/') -> '/home/pvgelderen/.mplayer/sub/'
[file] File size is 4118593 bytes
STREAM: [file] /mnt/m/video/test/berlin.mp3
STREAM: Description: File
STREAM: Author: Albeu
STREAM: Comment: based on the code from ??? (probably Arpi)
Checking for YUV4MPEG2
ASF_check: not ASF guid!
Checking for NuppelVideo
Checking for REAL
Checking for SMJPEG
Searching demuxer type for filename /mnt/m/video/test/berlin.mp3 ext: .mp3
Trying demuxer 17 based on filename extension
==> Found audio stream: 0
demux_audio: seeking from 0x3ED841 to start pos 0x0
demux_audio: audio data 0x0 - 0x3ED7C1
Audio file file format detected.
Clip info:
 Title: The Mobiles - Drowning in Berl
 Artist: Various
 Album: A Kick up the 80's
 Year: ????
 Comment: Created: MP3 Strip_It! Digita
 Genre: Pop
==========================================================================
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 MMX optimized decore!
MP3lib: init layer2&3 finished, tables done
MPEG 1.0, Layer III, 44100 Hz 160 kbit Stereo, BPF: 522
Channels: 2, copyright: No, original: No, CRC: No, emphasis: 0
AUDIO: 44100 Hz, 2 ch, s16le, 160.0 kbit/11.34% (ratio: 20000->176400)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
Building audio filter chain for 44100Hz/2ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 44100Hz/2ch/s16le
[dummy] Was reinitialized: 44100Hz/2ch/s16le
ao2: 44100 Hz  2 chans  s16le
audio_setup: using '/dev/dsp' dsp device
audio_setup: using '/dev/mixer' mixer device
audio_setup: using 'pcm' mixer device
audio_setup: sample format: s16le (requested: s16le)
audio_setup: using 2 channels (requested: 2)
audio_setup: using 44100 Hz samplerate (requested: 44100)
audio_setup: frags:  14/14  (4096 bytes/frag)  free:  57344
AO: [oss] 44100Hz 2ch s16le (2 bytes per sample)
AO: Description: OSS/ioctl audio output
AO: Author: A'rpi
Building audio filter chain for 44100Hz/2ch/s16le -> 44100Hz/2ch/s16le...
[dummy] Was reinitialized: 44100Hz/2ch/s16le
[dummy] Was reinitialized: 44100Hz/2ch/s16le
Video: no video
Freeing 0 unused video chunks.
Starting playback...




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