[MEncoder-users] audio encoding problem from tv

[SZABO Zsolt]

I tried the following command after downloading and compiling 1.0rc2 from 
mplayerhq (it is a pitty, but I was not able to compile the svn 
source):

mencoder -endpos 60 -o zzz.avi tv://\
  -tv driver=v4l2:normid=0:input=1:width=720:height=576:\
alsa:adevice=hw.1:amode=1:immediatemode=0\
  -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1200:autoaspect\
  -oac lavc -lavcopts acodec=ac3:abitrate=96:threads=2 -af volnorm\
  -vf crop=688:560:16:8,pp=lb -ffourcc XVID

The problem is that when trying to skip frames (pressing right/up arrow) 
during playing the obtained zzz.avi, the sound playback starts over. 
Furthermore, there is some A/V syncing problem (the sound is in late 
relative to the video) even without skipping.

I have attached the output... no idea what the problem is. Previously I 
used the syntax above with 1.0pre7try2 on another machine without any such 
problem.

TIA,
Zsolt

MEncoder 1.0rc2-4.1.2 (C) 2000-2007 MPlayer Team
CPU: Genuine Intel(R) CPU           T2300  @ 1.66GHz (Family: 6, Model: 
14, Stepping: 8)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

success: format: 9  data: 0x0 - 0x0
TV file format detected.
Selected driver: v4l2
  name: Video 4 Linux 2 input
  author: Martin Olschewski <olschewski at zpr.uni-koeln.de>
  comment: first try, more to come ;-)
Selected device: Pinnacle PCTV USB 2
  Tuner cap:
  Tuner rxs:
  Capabilites:  video capture  tuner  audio  read/write  streaming
  supported norms: 0 = PAL; 1 = NTSC; 2 = SECAM; 3 = PAL-M;
  inputs: 0 = Television; 1 = Composite1; 2 = S-Video;
  Current input: 0
  Current format: YUYV
v4l2: current audio mode is : STEREO
[V] filefmt:9  fourcc:0x32595559  size:720x576  fps:25.00  ftime:=0.0400
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 44100 Hz, 2 ch, s16le, 1411.2 kbit/100.00% (ratio: 176400->176400)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [pp=lb]
Opening video filter: [crop w=688 h=560 x=16 y=8]
Crop: 688 x 560, 16 ; 8
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 720 x 576 (preferred colorspace: Packed YUY2)
[PP] Using external postprocessing filter, max q = 6.
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Packed YUY2 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 9 -> 8
[swscaler @ 0x8775490]SwScaler: BICUBIC scaler, from yuyv422 to yuv420p 
using MMX2
[swscaler @ 0x8775490]SwScaler: using 4-tap MMX scaler for horizontal 
luminance scaling
[swscaler @ 0x8775490]SwScaler: using 4-tap MMX scaler for horizontal 
chrominance scaling
[swscaler @ 0x8775490]SwScaler: using 1-tap MMX "scaler" for vertical 
scaling (YV12 like)
[swscaler @ 0x8775490]SwScaler: 720x576 -> 720x576
videocodec: libavcodec (688x560 fourcc=34504d46 [FMP4])
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
Forcing output FourCC to 44495658 [XVID].
Forcing audio preload to 0, max pts correction to 0.
Writing header...1f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]
ODML: vprp aspect is 16384:13335.
Writing header...
ODML: vprp aspect is 16384:13335.
Pos:  60.0s   1501f ( 0%) 24.90fps Trem:   0min   0mb  A-V:0.000 [1205:95]
Flushing video frames.
Writing index...
Writing header...
ODML: vprp aspect is 16384:13335.

Video stream: 1205.428 kbit/s  (150678 B/s)  size: 9046735 bytes  60.040 
secs  1501 frames

Audio stream:   96.000 kbit/s  (11999 B/s)  size: 720142 bytes  60.012 
secs
v4l2: 1507 frames successfully processed, 0 frames dropped.