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686 discussions

madplay or libmad eating out the last part of the audio output
by Alexandru Munteanu 04 Jun '11

04 Jun '11

Hello, This mail is related to the following mp3splt bug report: http://sourceforge.net/tracker/index.php?func=detail&aid=2424463&group_id=5… What I was trying to find out is why the audio output length is different using other decoders or different madplay "options" I have made some tests on the attached file; here are the results : ------------------------------------------------------------------- - madplay with alsa output does not outputs the last part of the file (the laughter is missing) - madplay with wave output, then playing the created file with 'aplay' plays it entirely (with the laughter) - madplay on windows (MAD frontend version 1.4.1 - http://members.home.nl/w.speek/mad_frontend.htm) plays the whole - mpg123 also plays it entirely I don't understand why the audio output is different. I first tried to compare the number of frames and the frame sizes of mpg123 and libmad, but they were the same. Do you know how can I debug this further ? Any help is appreciated. Some more details : ------------------- $ lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux testing (wheezy) Release: testing Codename: wheezy $ uname -a Linux xxx 2.6.38-2-amd64 #1 SMP Sun May 8 13:51:57 UTC 2011 x86_64 GNU/Linux $ madplay --version MPEG Audio Decoder 0.15.1 (beta) Copyright © 2000-2004 Underbit Technologies, Inc. Build options: DEBUG FPM_DEFAULT ID3 Tag Library 0.15.1 (beta) Copyright © 2000-2004 Underbit Technologies, Inc. Build options: NDEBUG madplay 0.15.2 (beta) Copyright © 2000-2004 Robert Leslie Build options: DEBUG AUDIO_DEFAULT=audio_alsa ENABLE_NLS $ mpg123 --version mpg123 1.12.1 $ dpkg -l | grep "alsa-" ii alsa-base 1.0.23+dfsg-4 ALSA driver configuration files ii alsa-utils 1.0.23-5+b1 Utilities for configuring and using ALSA -- Alex

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python module
by Luis A. Florit 13 Feb '11

13 Feb '11

Hi folks, I'm new to the list, and this will certainly be a trivial question. Sorry for that... I just want to use libmad as a python module to do basic mp3 stuff. There is a module called pymad, but I failed miserably to install it in Maemo. So: how do I retrieve an MP3 play time duration in python? Thanks in advance, and sorry for the silly question. Cheers! L. -- My gallery: http://luis.impa.br/photos

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madplay play back error on start and end of file
by Krzysztof Stankiewicz 19 Jan '11

19 Jan '11

Hi, sorry its my first posting... hoping for some clues.. When I play back i get some noise at the beginning and end of the mp3... Iim using alsa soundcard on arm-linux. but cant compile madplay --with-alsa because libasound is not found, where is that? compiling without that flag all works except the noise at beginning and end of playback, im guessing madplay is outputing a non-raw format to a soundcard thats expecting raw?

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Enhancing madplay to speed up audio books and podcasts
by Bill Cox 10 Jan '11

10 Jan '11

I would like to enhance an audio book player called "daisy-player" to allow the user to control the speed. It uses madplay for all of it's sound output. I wrote a simple package called "sonic" that speeds up speech with low distortion. It's in plain ANSI C, and works well on ARM CPUs with no FPU (tested on Android). Since sonic is not yet included in Debian, I recommend just adding two files to the madplay source: sonic.c and sonic.h. I would be happy to make the initial edits to incorporate sonic speed up in the output stream processing of madplay. Would such an enhancement be of interest? Thanks, Bill

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Speeding up audio books and podcasts
by Bill Cox 09 Jan '11

09 Jan '11

Hi, Jos. Thanks for writing daisy-player. It looks quite good to me. I find that a lot of vision impaired people like to speed up podcasts and audio books. This is a feature I would be happy to help add to daisy-player. I wrote a simple C library called sonic which can speed up or slow down speech with fairly low distortion. It's best attribute is low distortion at high speed up factors of 2X or more. It looks like I need to modify madplay, to enable speeding up of speech as an option, which should not be too hard. I'll post to their dev list to see if I the author is interested in including the capability. Bill

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compile MAD on snowleopard
by jschmidt＠folkwang-hochschule.de 04 Jan '11

04 Jan '11

Hi everybody, I would like to include MAD in an xcode project and I used the very simple minimad.c file. I also included the headers from the project trunk. But then I get an error: "_mad_decoder_finish", referenced from: _main in main.o during the linking. So I realized that I have to build the mad-lib first (right?) and I started the ./configure from console which went well but the make throws another error: (sed -e '1s|.*|/*|' -e '1b' -e '$s|.*| */|' -e '$b' \ -e 's/^.*/ *&/' ./COPYRIGHT; echo; \ echo "# ifdef __cplusplus"; \ echo 'extern "C" {'; \ echo "# endif"; echo; \ if [ ".-DFPM_INTEL" != "." ]; then \ echo ".-DFPM_INTEL" | sed -e 's|^\.-D|# define |'; echo; \ fi; \ sed -ne 's/^# *define *$HAVE_.*_ASM$.*/# define \1/p' \ config.h; echo; \ sed -ne 's/^# *define *OPT_$SPEED\|ACCURACY$.*/# define OPT_\1/p' \ config.h; echo; \ sed -ne 's/^# *define *$SIZEOF_.*$/# define \1/p' \ config.h; echo; \ for header in version.h fixed.h bit.h timer.h stream.h frame.h synth.h decoder.h; do \ echo; \ sed -n -f ./mad.h.sed ./$header; \ done; echo; \ echo "# ifdef __cplusplus"; \ echo '}'; \ echo "# endif") >mad.h make all-recursive if /bin/sh ./libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I. -DFPM_INTEL -DASO_ZEROCHECK -Wall -march=i486 -g -O -fforce-mem -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 -fstrength-reduce -MT version.lo -MD -MP -MF ".deps/version.Tpo" -c -o version.lo version.c; \ then mv -f ".deps/version.Tpo" ".deps/version.Plo"; else rm -f ".deps/version.Tpo"; exit 1; fi mkdir .libs gcc -DHAVE_CONFIG_H -I. -I. -I. -DFPM_INTEL -DASO_ZEROCHECK -Wall -march=i486 -g -O -fforce-mem -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 -fstrength-reduce -MT version.lo -MD -MP -MF .deps/version.Tpo -c version.c -fno-common -DPIC -o .libs/version.o cc1: warning: -f[no-]force-mem is nop and option will be removed in 4.3 version.c:1: error: CPU you selected does not support x86-64 instruction set version.c:1: error: CPU you selected does not support x86-64 instruction set make[2]: *** [version.lo] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 This looks like the wrong architecture.. but I am not so familiar with the options in 'make'. Can anybody confirm the first case and does anyone have an idea for the make-problem? Thanks a lot in advance! Best Johannes

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madplay
by Neil Jones 22 Sep '10

22 Sep '10

Hi, Im trying to play mp3's on a new arch using madplay and alsa. If I pipe the output of madplay into alsa it works fine eg: madplay -R48000 -o wav:- file.mp3 | aplay -cc but if I invoke it directly: madplay - R48000 file.mp3 it sounds horrible, like its clipping and there lots of white/pinknoise mixed in. I have tried attenuating the output (-a -10) and check alasa-mixer settings that doesn't help. I also get the same effect when playing audio via mplayer (using libmad) I have no FPU so cant try mpg123 for instance. Any help or hints welcome. Cheers Neil

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Skipping and Rewinding to certain frames (Low Level API)
by Adam Magaluk 09 Jun '10

09 Jun '10

Hello Mad List, I am working on a project that uses libmad to decode mp3s, one requirement for the project is for rewinding or fast forwarding to a particular frame at any point in the playback. What is the preferred way to do that? Currently I set a variable when skipping forward that disables the write to output (which is libao). It works but I get a bunch of alsa underun errors (Not a libmad problem though). What bothers me more though is when I want to rewind I have to re-initialize the song and skip to the frame that is needed. That seems very inefficient to me. Is there a better way? Thanks for any advice, Adam Magaluk

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help
by 肖芳 08 Jun '10

08 Jun '10

hello : I want to use this libmad on FPGA to decode MP3,but I get the results of zeros ,I don't know why,please help me ! thank you ! xiao fang

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libmad and pkgconfig
by Александр Цамутали 20 Apr '10

20 Apr '10

Hi! I've sent this email today without subscribing first. It seems like it didn't reached list. So I subscribed and sent it again. Recently I packaged mpd for NixOS [1] and found one problem. mpd's configure uses pkgconfig to find libmad. There was no mad.pc in NixOS and I was surprised to find that Arch Linux, Gentoo and Debian patch libmad to install mad.pc. So I took patch from Arch Linux [2]. I think it would be good to add this patch to libmad sources, what do you think? [1] http://nixos.org [2] http://repos.archlinux.org/wsvn/packages/libmad/trunk/libmad.patch -- Александр Цамутали

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