[MPlayer-users] buggy audio w/ ffwmav2 under 1.0pre3

[k. m.]

Hello, all. New to the list, though not new to MPlayer.

I'm running MPlayer 1.0pre3 (latest official release, not CVS) and have
found it can't handle files that use the audio codec ffwmav2 and an
audio bitrate of either 32000 or 16000.

Video plays fine, if a little jerky, but the audio comes out like
"dbfzzzt...[2-3 seconds of silence]...bzzort...zeeplt..." and so on.
Qualitatively, it sounds like mplayer is trying to process and play 3-4
seconds of audio *at once*, giving up, and then trying it again with the
next 3-4 seconds.

The problem is not strictly linear; 32k and 16k exhibit the bug, but
files using the same audio codec with a bitrate of 48k or 64k are fine.
Audio bitrate of 32040, or something else just shy of the magic number,
is also OK.

I can't reproduce the bug in 0.92. It's just not there. Ordinarily I'd
ignore the problem and drop down a version, but 1.0 is in other respects
vastly superior and if this is a fixable bug I'd rather not.

I'm running Debian woody (or something very close to it, given the
vagaries of apt-get) over the 2.2.22 kernel. I have a CrystalFusion 4281
soundcard and am using the OSS drivers. A bugfix beginning "first, you
upgrade to the 2.4 kernel" won't help me. The exact reason is long,
stupid, and not of general interest, but the upshot is that I'm stuck
with 2.2.

Below is MPlayer's output when playing a representative file. If
necessary, I can also post the output of dmesg and ./configure.

---

Output when playing essence.wmv (with -identify flag) under 1.0pre3:

MPlayer 1.0pre3-3.3.2 (C) 2000-2003 MPlayer Team
CPU: Advanced Micro Devices K6-2 475.8 MHz (Family: 5, Stepping: 12)
Detected cache-line size is 32 bytes
3DNow supported but disabled
CPUflags:  MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX

Reading config file /usr/local/etc/mplayer/mplayer.conf: No such file or
directory
Reading config file /home/booklegger/.mplayer/config
Reading /home/booklegger/.mplayer/codecs.conf: 61 audio & 169 video
codecs
font: can't open file: /home/booklegger/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Failed to open /dev/rtc: No such device (mplayer should be setuid root
or /dev/rtc should be readable by the user.)
Using usleep() timing
Input config file /home/booklegger/.mplayer/input.conf parsed: 53 binds

Playing essence.wmv.
Cache fill: 14.16% (1187840 bytes)    ASF file format detected.
============ ASF Stream group == START ===
object size = 38
stream count=[0x2][2]
stream id=[0x1][1]
max bitrate=[0x8610][34320]
stream id=[0x2][2]
max bitrate=[0x4e520][320800]
============ ASF Stream group == END ===
VIDEO:  [WMV1]  320x240  24bpp
Clip info:
name:
author:
copyright:
comments:
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 32000 Hz, 2 ch, 16 bit (0x10), ratio: 4000->128000 (32.0 kbit)
Selected audio codec: [ffwmav2] afm:ffmpeg (DivX audio v2 (ffmpeg))
==========================================================================
ID_FILENAME=essence.wmv
ID_VIDEO_FORMAT=WMV1
ID_VIDEO_BITRATE=0
ID_VIDEO_WIDTH=320
ID_VIDEO_HEIGHT=240
ID_VIDEO_FPS=1000.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_CODEC=ffwmav2
ID_AUDIO_FORMAT=353
ID_AUDIO_BITRATE=32000
ID_AUDIO_RATE=32000
ID_AUDIO_NCH=2
ID_LENGTH=317
vo: X11 running at 800x600 with depth 24 and 32 bpp (":0.0" => local
display)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffwmv1] vfm:ffmpeg (FFmpeg M$ WMV1/WMV7)
==========================================================================
Checking audio filter chain for 32000Hz/2ch/16bit ->
32000Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 32000 hz, little endian signed int
AF_pre: 32000Hz 2ch Signed 16-bit (Little-Endian)
AO: [oss] 32000Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
Building audio filter chain for 32000Hz/2ch/16bit ->
32000Hz/2ch/16bit...
Starting playback...
VDec: vo config request - 320 x 240 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [x11] 320x240 => 320x240 Planar YV12
SwScaler: using unscaled Planar YV12 -> BGR 32-bit special converter
New_Face failed. Maybe the font path is wrong.
Please supply the text font file (~/.mplayer/subfont.ttf).
subtitle font: load_sub_face failed.
Exiting... (Quit)

---

Messages when playing the same file (sans -identify) using 0.92:

MPlayer 0.92-3.3.2  (C) 2000-2003 MPlayer Team
CPU: Advanced Micro Devices K6-2 (Family: 5, Stepping: 12)
Detected cache-line size is 32 bytes
3DNow supported but disabled
CPUflags:  MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX

Reading config file /usr/local/etc/mplayer/mplayer.conf: No such file or
directory
Reading config file /home/booklegger/.mplayer/config
Reading /home/booklegger/.mplayer/codecs.conf: 50 audio & 136 video
codecs
font: can't open file: /home/booklegger/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Failed to open /dev/rtc: No such device (mplayer should be setuid root
or /dev/rtc should be readable by the user.)
Using usleep() timing
Input config file /home/booklegger/.mplayer/input.conf parsed: 52 binds

Playing essence.wmv
Cache fill: 12.50% (1048576 bytes)    ASF file format detected.
============ ASF Stream group == START ===
object size = 38
stream count=[0x2][2]
stream id=[0x1][1]
max bitrate=[0x8610][34320]
stream id=[0x2][2]
max bitrate=[0x4e520][320800]
============ ASF Stream group == END ===
VIDEO:  [WMV1]  320x240  24bpp
Clip info:
name:
author:
copyright:
comments:
==========================================================================
Opening audio decoder: [dmo] Win32/DMO decoders
======= WAVE Format =======
Format Tag: 353 (0x161)
Channels: 2
Samplerate: 32000
avg byte/sec: 4000
Block align: 768
bits/sample: 16
cbSize: 10
Unknown extra header dump: [0] [88] [0] [0] [17] [0] [0] [1e] [0] [0]
======= WAVE Format =======
Format Tag: 1 (0x1)
Channels: 2
Samplerate: 32000
avg byte/sec: 128000
Block align: 4
bits/sample: 16
cbSize: 0
External func OLEAUT32.dll:7
External func OLEAUT32.dll:8
GetOutput r=0x0   size:16384  align:1
StreamCount r=0x0  1  1
AUDIO: 32000 Hz, 2 ch, 16 bit (0x10), ratio:
4000->128000 (32.0 kbit)
Selected audio codec: [wmadmo] afm:dmo (Windows Media Audio DMO)
==========================================================================
vo: X11 running at 800x600 with depth 24 and 32 bpp (":0.0" => local
display)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffwmv1] vfm:ffmpeg (FFmpeg M$ WMV1/WMV7)
==========================================================================
Checking audio filter chain for 32000Hz/2ch/16bit ->
32000Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 32000 hz, little endian signed int
AF_pre: 32000Hz 2ch Signed 16-bit (Little-Endian)
AO: [oss] 32000Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
Building audio filter chain for 32000Hz/2ch/16bit ->
32000Hz/2ch/16bit...
Starting playback...
VDec: vo config request - 320 x 240 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [x11] 320x240 => 320x240 Planar YV12
Using MMX for colorspace transform
SwScaler: using unscaled Planar YV12 -> BGR 32-bit special converter
New_Face failed. Maybe the font path is wrong.
Please supply the text font file (~/.mplayer/subfont.ttf).
subtitle font: load_sub_face failed.
Total Unfree 0 bytes cnt 0 [(nil),0].073  266/266  18% 34%  6.4% 1 0 93%
Exiting... (Quit)

---

Thanks for your help.

- katherine




---
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