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mplayer_seek_problem
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mplayer_seek_problem
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实际时间： 04:15, 04:13
显示时间： A: 269.9 (04:29.8) of 4131.0 ( 1:08:51.0) 1.5% 感觉这个时间并不准确，有一定的缓冲。播放时间位置一直落后于这个显示时间。
04:20
ideer@ideer:/home/chenz/aMule/Incoming/MusiCD$ time mplayer -ao alsa LPCD45之等你等到我心痛精选.flac
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz (Family: 6, Model: 15, Stepping: 13)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
/home/ideer/.fonts/STHeiti.ttf doesn't look like a bitmap font description, ignoring.
Cannot load bitmap font: /home/ideer/.fonts/STHeiti.ttf
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing LPCD45之等你等到我心痛精选.flac.
Audio file file format detected.
Clip info:
Album: LPCD45之等你等到我心痛精选
Artist: 张学友
==========================================================================
Forced audio codec: mad
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 858.9 kbit/60.86% (ratio: 107359->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio decoder)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 264.2 (04:24.1) of 4131.0 ( 1:08:51.0) 1.5%
MPlayer interrupted by signal 2 in module: play_audio
real 4m13.190s
user 0m6.400s
sys 0m0.724s
手机计时 00:04:14:98s
说明实际歌曲长度在4:13左右，但是我们seek到253s，歌曲并没有结束
ideer@ideer:/home/chenz/aMule/Incoming/MusiCD$ time mplayer -ao alsa LPCD45之等你等到我心痛精选.flac
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz (Family: 6, Model: 15, Stepping: 13)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
/home/ideer/.fonts/STHeiti.ttf doesn't look like a bitmap font description, ignoring.
Cannot load bitmap font: /home/ideer/.fonts/STHeiti.ttf
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing LPCD45之等你等到我心痛精选.flac.
Audio file file format detected.
Clip info:
Album: LPCD45之等你等到我心痛精选
Artist: 张学友
==========================================================================
Forced audio codec: mad
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 858.9 kbit/60.86% (ratio: 107359->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio decoder)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 263.8 (04:23.8) of 4131.0 ( 1:08:51.0) 1.5%
MPlayer interrupted by signal 2 in module: play_audio
real 4m12.802s
user 0m6.520s
sys 0m0.864s
手机时间：00:04:12:59s
ideer@ideer:/home/chenz/aMule/Incoming/MusiCD$ time mplayer -ao alsa LPCD45之等你等到我心痛精选.flac
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz (Family: 6, Model: 15, Stepping: 13)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
/home/ideer/.fonts/STHeiti.ttf doesn't look like a bitmap font description, ignoring.
Cannot load bitmap font: /home/ideer/.fonts/STHeiti.ttf
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing LPCD45之等你等到我心痛精选.flac.
Audio file file format detected.
Clip info:
Album: LPCD45之等你等到我心痛精选
Artist: 张学友
==========================================================================
Forced audio codec: mad
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 858.9 kbit/60.86% (ratio: 107359->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio decoder)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 264.1 (04:24.0) of 4131.0 ( 1:08:51.0) 1.5%
MPlayer interrupted by signal 2 in module: play_audio
real 4m13.072s
user 0m6.384s
sys 0m0.760s
手机时间: 00:04:12:82
ideer@ideer:/home/chenz/aMule/Incoming/MusiCD$ time mplayer -ao alsa '黄凯芹 LPCD45.flac'
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz (Family: 6, Model: 15, Stepping: 13)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
/home/ideer/.fonts/STHeiti.ttf doesn't look like a bitmap font description, ignoring.
Cannot load bitmap font: /home/ideer/.fonts/STHeiti.ttf
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing 黄凯芹 LPCD45.flac.
Audio file file format detected.
Clip info:
Album: LPCD45之黄凯芹
Artist: 黄凯芹
==========================================================================
Forced audio codec: mad
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, s16le, 835.8 kbit/59.23% (ratio: 104479->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio decoder)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 264.0 (04:24.0) of 4028.0 ( 1:07:08.0) 1.5%
MPlayer interrupted by signal 2 in module: play_audio
real 4m18.166s
user 0m6.864s
sys 0m0.872s
手机时间： 00:04:17:95
这个显示时间也许只是缓冲区内的时间，并不是实际已经播放的时间。seek操作可能是根据这个时间来进行，但是
这是错误的。但是绝对寻址不应该根据这个时间啊，困惑。
假设p1指向实际的播放位置，p2指向缓冲区中已经解码的位置，seek delta的结果应该是 p1 = p1 + delta，
而不是仅把delta之后的加到缓冲区中。先清空p1，然后另p1指向新的位置。
seek不但不能清空缓冲区，