[Mplayer-users] Fast-forward causing A/V de-sync

[Niklas Karlsson]

Hello,

I'm using MPlayer CVS-010827-16:28, and I seem to consistently have the
problem that audio and video get de-synced if I use the fast-forward or
rewind functions. This occurs in all DivX files I've been able to get my
hands on, both broken and un-broken ones (e.g. both with and without
using the -idx option). The audio track seems to get fast-forwarded
slower than the video, e.g. actors' mouths move first, then the speech
comes several seconds later.

I'm using a Debian 2.2 system, with some changes, as noted below.

Kernel version: Linux nestor 2.4.3 #13 SMP Wed May 9 13:08:20 CEST 2001
i686 unknown

libc version:
-rwxr-xr-x    1 root     root       887712 Sep  1  2000
/lib/libc-2.1.3.so
lrwxrwxrwx    1 root     root           14 Nov 23  2000 /lib/libc.so.5
-> libc.so.5.4.46
-rw-r--r--    1 root     root       586720 Feb  9  1999
/lib/libc.so.5.4.46
lrwxrwxrwx    1 root     root           13 Nov 22  2000 /lib/libc.so.6
-> libc-2.1.3.so


X version:
XFree86 Version 4.0.99.2 / X Window System
(protocol Version 11, revision 0, vendor release 6510)
Release Date: 6 April 2001

(I installed this pre-release version of X in order to get DRI working
with my ATI Rage 128 Pro graphics card.)

GCC and ld versions:
gcc version 2.95.2 20000220 (Debian GNU/Linux)
GNU ld version 2.10.1 (with BFD 2.10.1)

Binutils version:
GNU assembler 2.10.1

CPU info:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 8
model name	: Pentium III (Coppermine)
stepping	: 3
cpu MHz		: 731.498
cache size	: 256 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat
pse36 mmx fxsr sse
bogomips	: 1458.17

Video card:
ATI Rage 128 Pro PF (AGP)

Video driver:
ATI: ATI driver (version 6.3.1) for chipsets: ati, ativga
DRI from X 4.0.99.2

Sound card:
Sound Blaster 16 PCI
Creative Ensoniq AudioPCI 97 driver

lspci output on sound card:
00:0a.0 Multimedia audio controller: Ensoniq: Unknown device 5880 (rev
02)
	Subsystem: Ensoniq: Unknown device 2000
	Flags: bus master, slow devsel, latency 32, IRQ 3
	I/O ports at c000 [size=64]
	Capabilities: [dc] Power Management version 1

Verbose mplayer output:

MPlayer CVS-010827-16:28(C) 2000-2001 Arpad Gereoffy (see DOCS/AUTHORS)

CommandLine: '-v' '-vo' 'xv' '-idx' 'Dune.avi'
num_filenames: 1
Reading /home/niklas/.mplayer/codecs.conf: 16 audio & 36 video codecs
font: can't open file: /home/niklas/.mplayer/font/font.desc
font: can't open file: /usr/share/mplayer/font/font.desc
Playing Dune.avi
File size is 724407732 bytes
Detected AVI file format!
======= AVI Header =======
us/frame: 41667  (fps=24.000)
max bytes/sec: 211986
padding: 0
MainAVIHeader.dwFlags: (2064) HAS_INDEX TRUST_CKTYPE
frames  total: 589243   initial: 0
streams: 2
Suggested BufferSize: 58428
Size:  720 x 272
==> Found video stream: 0
======= STREAM Header =======
Type: vids   FCC: DIV4 (34564944)
Flags: 0
Priority: 0   Language: 0
InitialFrames: 0
Rate: 24/1 = 24.000
Start: 0   Len: 196427
Suggested BufferSize: 58428
Quality 5000
Sample size: 0
found 'bih', 40 bytes of 40
======= VIDEO Format ======
  biSize 40
  biWidth 720
  biHeight 272
  biPlanes 1
  biBitCount 24
  biCompression 861292868='DIV3'
  biSizeImage 587520
===========================
==> Found audio stream: 1
======= STREAM Header =======
Type: auds   FCC:  (0)
Flags: 0
Priority: 0   Language: 0
InitialFrames: 0
Rate: 16000/1 = 16000.000
Start: 0   Len: 392832000
Suggested BufferSize: 16388
Quality -1
Sample size: 1
found 'wf', 30 bytes of 20
======= WAVE Format =======
Format Tag: 85 (0x55)
Channels: 2
Samplerate: 48000
avg byte/sec: 16000
Block align: 1
bits/sample: 0
cbSize: 12
Found movie at 0x800 - 0x2B55AA78
stream_seek: WARNING! Can't seek to 0x2B55AA78 !
stream_seek: WARNING! Can't seek to 0x2B2DA000 !
AVI: Generated index table for 203873 chunks!
AVI index offset: 0
Auto-selected AVI video ID = 0
Auto-selected AVI audio ID = 1
AVI: Searching for audio stream (id:1)
XXX initial  v_pts=0.958  a_pos=0 (0.000) 
AVI video length=332569456
VIDEO:  [DIV3]  720x272  24bpp  24.00 fps  325.1 kbps (39.7 kbyte/s)
[V] filefmt:3  fourcc:0x33564944  size:720x272  fps:24.00  ftime:=0.0417
Detected audio codec: [mp3] drv:1 (MPEG layer-2, layer-3)
Initializing audio codec...
dec_audio: Allocating 4608 + 65536 = 70144 bytes for output buffer
mp3lib: Processor ID: 683
mp3lib: Using SSE! optimized decore.
AUDIO: srate=48000  chans=2  bps=2  sfmt=0x10  ratio: 16000->192000
Detected video codec: [divxds] drv:4 (DivX ;-) (MS MPEG-4 v3))
Loading DLL: /usr/lib/win32/divx_c32.ax  OK
Using DirectShow codec: divx_c32.ax
Decoder is capable of YUV output ( flags 0x1 )
m_bIsDivX=1
INFO: Win32/DShow video codec init OK!
VO: [xv] 720x272 => 720x272 Packed YUY2 
VO: Description: X11/Xv
VO: Author: Gerd Knorr <kraxel at goldbach.in-berlin.de>
video_out->init(720x272->720x272,flags=0,'MPlayer',0x32595559)
vo: X11 color mask:  FFFF  (R:F800 G:7E0 B:1F)
vo: X11 running at 1024x768 depth: 16 (":0" => local display)
Xvideo image format: 0x32595559 (YUY2) packed
Xvideo image format: 0x59565955 (UYVY) packed
Xvideo image format: 0x32315659 (YV12) planar
Xvideo image format: 0x30323449 (I420) planar
using Xvideo port 50 for hw scaling
[xv] dcx: 159 dcy: 247 dx: 0 dy: 0 dw: 720 dh: 272
INFO: Video OUT driver init OK!
AO: [oss] 48000Hz Stereo Signed 16-bit (Little-Endian)
AO: Description: OSS/ioctl audio output
AO: Author: A'rpi
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 48000 Hz samplerate (requested: 48000)
audio_setup: frags: 128/128  (1024 bytes/frag)  free: 131072
Start playing...




(The seek errors are due to this run being made on a broken AVI.
However, as I said, the problem also occurs with all non-broken AVIs
I've tried it on.)

Regards,
Niklas

-- 
 Spammers. Can't live with them, can't flay them
and throw them into a bath of coarse sea salt.

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