[#4108] mplayer cannot play mp3 smoothly

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[#4108] mplayer cannot play mp3 smoothly

Submitted By: Yi Li

Open Date

2008-05-16 05:01:39    

Priority:

Low     Assignee:

Nobody

Status:

Open     Fixed In Release:

N/A

Found In Release:

N/A     Release:

trunk

Category:

N/A     Board:

STAMP

Processor:

BF537     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

N/A

Uboot version or rev.:

    Toolchain version or rev.:

App binary format:

N/A     

Summary: mplayer cannot play mp3 smoothly

Details:

 

uclinux-dist: Revision: 6686

linux-kernel: Revision: 4747

 

BF537-STAMP, ad1836

 

mplayer cannot play a mp3 file smoothly, there are jitters every several seconds. However, mp3play works well. So I am thinking this is a mplayer problem. Hope this issue is reproducible.

 

root:/> lsmod                                                                  

Module                  Size  Used by                                          

snd_pcm_oss            30400  0                                                

snd_mixer_oss          11168  1 snd_pcm_oss                                    

snd_ad1836             16136  0                                                

snd_pcm                49028  2 snd_pcm_oss,snd_ad1836                         

snd_timer              13764  1 snd_pcm                                        

snd_page_alloc          4072  1 snd_pcm                                        

snd                    31572  5 snd_pcm_oss,snd_mixer_oss,snd_ad1836,snd_pcm,snr

soundcore               3908  1 snd                                            

                                                                       

root:/> mplayer -ao help                                                       

MPlayer dev-SVN-r6686-4.1.2 (C) 2000-2007 MPlayer Team                         

Available audio output drivers:                                                

        oss     OSS/ioctl audio output                                         

        mpegpes DVB audio output                                               

        v4l2    V4L2 MPEG Audio Decoder output                                 

        null    Null audio output                                              

        pcm     RAW PCM/WAVE file writer audio output                          

                                                                               

117 audio & 238 video codecs                                                   

 

root:/> mplayer test.mp3                                                       

MPlayer dev-SVN-r6686-4.1.2 (C) 2000-2007 MPlayer Team                         

117 audio & 238 video codecs                                                   

                                                                               

Playing test.mp3.                                                              

Audio file file format detected.                                               

Clip info:                                                                     

Title: It's All Over Now, Baby Blue                                           

Artist: Joan Baez                                                             

Album: Baez Sings Dylan                                                       

Year: 1998                                                                    

Comment:                                                                      

Track: 2                                                                      

Genre: Folk                                                                   

==========================================================================     

Opening audio decoder: [libmad] libmad mpeg audio decoder                      

AUDIO: 44100 Hz, 2 ch, s16le, 256.0 kbit/18.14% (ratio: 32000->176400)         

Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)              

==========================================================================     

AO: [oss] 44100Hz 2ch s16le (2 bytes per sample)                               

Video: no video                                                                

Starting playback...                                                           

A:   9.0 (08.9) of 208.0 (03:28.0)  1.4%                                       

                                                                               

MPlayer interrupted by signal 2 in module: play_audio                          

root:/>                                                                        

root:/> mp3play -v -P test.mp3                                                 

test.mp3:                                                                      

    MPEG1-III stereo 256kbps 44100Hz (208394 ms)                               

    Decoding: Channels=2 Quality=2 Frequency=44100Hz                           

    Title:    It's All Over Now, Baby Blue                                     

    Artist:   Joan Baez                                                        

    Album:    Baez Sings Dylan                                                 

    Year:     1998                                                             

    Comments:                                                                  

    Genre:    Folk                                                             

 

Follow-ups

 

--- Mike Frysinger                                           2008-05-16 09:49:33

mp3play does not use libmad ... it uses its own internal mp3 decoding routines

 

 

 

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