[MPlayer-users] a52 problems - Audio Stream detection.
Marcos Aurelio Lenharo
lenharo at gmx.net
Thu May 9 20:57:02 CEST 2002
Hi!
This is really not an a52 problem.
There is something strange with the audio stream detection.
I ripped a DVD to my harddisk and when i try do use mplayer it says:
Detected MPEG-PS file format!
==> Found audio stream: 137 uh????? (there is no audio stream 137!!!)
Searching for sequence header... OK!
VIDEO: MPEG2 720x576 (aspect 3) 25.00 fps 7500.0 kbps (937.5
kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400
get_path('sub/') -> '/home/lenharo/.mplayer/sub/'
Detected audio codec: [a52] drv:14 (AC3-liba52)
Initializing audio codec...
Selecting Audio Decoder: [liba52] AC3-liba52
dec_audio: Allocating 3840 bytes for input buffer
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer
Using 3DNowEx optimized IMDCT transform
==> Found audio stream: 130
==> Found audio stream: 128
==> Found audio stream: 131
==> Found audio stream: 132
{ERROR5,c=0}
{ERROR5,c=0}
a52: CRC check failed!
AC3: 2.0 (stereo) 48000 Hz 40.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0x2
Using MMX optimized resampler
AUDIO: srate=48000 chans=2 bps=2 sfmt=0x10 ratio: 5000->192000
Great! The 4 audio streams were detected, but then...
==========================================================================
AO: [oss] 48000Hz Stereo Signed 16-bit (Little-Endian)
AO: Description: OSS/ioctl audio output
AO: Author: A'rpi
ao2: 48000 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 48000 Hz samplerate (requested: 48000)
audio_setup: frags: 128/128 (1024 bytes/frag) free: 131072
Start playing...
a52: error at resampling
{ERROR5,c=0}
{ERROR5,c=0}
==> Found subtitle: 3
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
{ERROR5,c=0}
a52: CRC check failed!
a52: error at resampling
If I use -aid with a valid audio stream it plays the stream but the
output is different:
with -aid=128
Detected MPEG-PS file format!
==> Found audio stream: 137
==> Found audio stream: 130
==> Found audio stream: 128
Searching for sequence header... OK!
VIDEO: MPEG2 720x576 (aspect 3) 25.00 fps 7500.0 kbps (937.5
kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400
get_path('sub/') -> '/home/lenharo/.mplayer/sub/'
Detected audio codec: [a52] drv:14 (AC3-liba52)
Initializing audio codec...
Selecting Audio Decoder: [liba52] AC3-liba52
dec_audio: Allocating 3840 bytes for input buffer
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer
Using 3DNowEx optimized IMDCT transform
AC3: 5.1 (3f+2r+lfe) 48000 Hz 384.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0xA
Using MMX optimized resampler
AUDIO: srate=48000 chans=2 bps=2 sfmt=0x10 ratio: 48000->192000
with -aid=130
Detected MPEG-PS file format!
==> Found audio stream: 137
==> Found audio stream: 130
Searching for sequence header... OK!
VIDEO: MPEG2 720x576 (aspect 3) 25.00 fps 7500.0 kbps (937.5
kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400
get_path('sub/') -> '/home/lenharo/.mplayer/sub/'
Detected audio codec: [a52] drv:14 (AC3-liba52)
Initializing audio codec...
Selecting Audio Decoder: [liba52] AC3-liba52
dec_audio: Allocating 3840 bytes for input buffer
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer
Using 3DNowEx optimized IMDCT transform
AC3: 5.1 (3f+2r+lfe) 48000 Hz 384.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0xA
Using MMX optimized resampler
AUDIO: srate=48000 chans=2 bps=2 sfmt=0x10 ratio: 48000->192000
with -aid=131
Detected MPEG-PS file format!
==> Found audio stream: 137
==> Found audio stream: 130
==> Found audio stream: 128
==> Found audio stream: 131
Searching for sequence header... OK!
VIDEO: MPEG2 720x576 (aspect 3) 25.00 fps 7500.0 kbps (937.5
kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400
get_path('sub/') -> '/home/lenharo/.mplayer/sub/'
Detected audio codec: [a52] drv:14 (AC3-liba52)
Initializing audio codec...
Selecting Audio Decoder: [liba52] AC3-liba52
dec_audio: Allocating 3840 bytes for input buffer
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer
Using 3DNowEx optimized IMDCT transform
AC3: 2.0 (dolby) 48000 Hz 192.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0xA
Using MMX optimized resampler
AUDIO: srate=48000 chans=2 bps=2 sfmt=0x10 ratio: 24000->192000
and with -aid=132
Detected MPEG-PS file format!
==> Found audio stream: 137
==> Found audio stream: 130
==> Found audio stream: 128
==> Found audio stream: 131
==> Found audio stream: 132
Searching for sequence header... OK!
VIDEO: MPEG2 720x576 (aspect 3) 25.00 fps 7500.0 kbps (937.5
kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400
get_path('sub/') -> '/home/lenharo/.mplayer/sub/'
Detected audio codec: [a52] drv:14 (AC3-liba52)
Initializing audio codec...
Selecting Audio Decoder: [liba52] AC3-liba52
dec_audio: Allocating 3840 bytes for input buffer
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer
Using 3DNowEx optimized IMDCT transform
AC3: 2.0 (dolby) 48000 Hz 96.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0xA
Using MMX optimized resampler
AUDIO: srate=48000 chans=2 bps=2 sfmt=0x10 ratio: 12000->192000
So... the audio stream auto-detection depends on the -aid flag?
and which audio stream does it try to play when I don't use the -aid
flag?
I didn't find anything in the DOCs about it.
Thanks
>
--
Marcos Aurelio Lenharo
ICQ #122749321
GPG Key Available - Key ID 820DE59F.
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