[MPlayer-users] Re: Mencoder - video buffer full after ~4 mins. of recording (James Lancaster)

[Ken Fuhrman]

> How fast is your system? CPU etc (looks like the mencoder output was clipped,
> as mencoder should aways print it (along with version number) so PLEASE don't
> clip the output.

Sorry about that, below is the missing output.  It is a 900Mhz VIA C3
processor.  The FPU is running slower in this C3 processor, the next
version of this processor is suppose to enable the FPU to run twice as
fast.  I think the solution will be to encode audio as PCM (no
compression).  And then make a 2nd pass later to compress the audio and
reduce the file size.

-- missing mencoder output ----
 
MEncoder 0.90rc4-RPM-3.1 (C) 2000-2003 Arpad Gereoffy (see DOCS)
 
CPU: IDT/Centaur/VIA  (Family: 6, Stepping: 9)
Detected cache-line size is 32 bytes
CPUflags: Type: 6 MMX: 1 MMX2: 0 3DNow: 1 3DNow2: 0 SSE: 0 SSE2: 0
Reading /root/.mplayer/codecs.conf: can't open
'/root/.mplayer/codecs.conf': No such file or directory
Reading /etc/mplayer/codecs.conf: 50 audio & 135 video codecs
File not found: 'frameno.avi'
Reading config file /root/.mplayer/mencoder: No such file or directory
success: format: 0  data: 0x0 - 0x0
TV detected! ;-)

> 
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > In general mencoder is working fine with no frame drops, for the
> > bitrates and parameters set, but after approximately 4-5 minutes of
> > recording it starts reporting that the  "video buffer full - dropping
> > frame".  I am recording
> > from v4l using mpeg4 and mp3 (see mencoder arguments below).
> >
> 
> This will happen if your system is just a bit too slow to encode it. it
> records to memory, but doesn't get encoded fast enough.
> 
> > Mencoder continues reporting this message and no additional frames are
> > encoded.  The video/audio recorded to that point plays perfectly with no
> > frame drops.  I included the output of mencoder which shows when this
> > happens.
> >
> > I am trying to figure out what is causing this, if there was an overall
> > performance problem I would expect more spurious frame drops.  I realize
> > mencoder takes up half of the memory and that I can specify a maximum
> > framebuffer size.
> > Any comments on why this is happening...I would love to use mencoder to
> > record longer video programs ;)
> >
> > mencoder arguments:
> >
> > mencoder  -tv
> > on:driver=v4l:device=/dev/video2:chanlist=us-cable:channel=3:forcechan=2:no
> >rm=NTSC:width=320:height=240 \
> > -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=750:v4mv:vqmax=31:keyint=300
> > \
> > -oac mp3lame -lameopts cbr:br=64 -o output.avi
> >
> > Output of mencoder:
> >
> > Selected device: BT878(Hauppauge (bt878))
> >  Capabilites: capture tuner overlay clipping frameram scales
> >  Device type: 235
> >  Supported sizes: 48x32 => 768x480
> >  Inputs: 4
> >   0: Television: tuner audio tv camera  (tuner:1, norm:ntsc)
> >   1: Composite1: audio camera  (tuner:0, norm:ntsc)
> >   2: S-Video: audio camera  (tuner:0, norm:ntsc)
> >   3: Composite3: audio camera  (tuner:0, norm:ntsc)
> > Using input 'Television'
> > Selected channel: 3 (freq: 61.250)
> > [V] filefmt:9  fourcc:0x32315659  size:320x240  fps:29.00  ftime:=0.0345
> > ==========================================================================
> > Opening audio decoder: [pcm] Uncompressed PCM audio decoder
> > AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 176400->176400 (1411.2
> > kbit)
> > Selected audio codec: [pcm] afm:pcm (Uncompressed PCM)
> > ==========================================================================
> > Opening video filter: [expand=-1:-1:-1:-1:1]
> > Expand: -1 x -1, -1 ; -1  (-1=autodetect) osd: 1
> > ==========================================================================
> > Opening video decoder: [raw] RAW Uncompressed Video
> > 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.
> > videocodec: libavcodec (320x240 fourcc=58564944 [DIVX])
> > Selected video codec: [rawyv12] vfm:raw (RAW YV12)
> > ==========================================================================
> > MP3 audio selected
> > Building audio filter chain for 44100Hz/2ch/16bit ->
> > 44100Hz/2ch/16bit...
> > Writing AVI header...
> > Forcing audio preload to 0, max pts correction to 0
> > Pos: 263.5s   7892f ( 0%)  27fps Trem:   0min   0mb  A-V:0.000 [755:63]]
> > video buffer full - dropping frame
> > CBR audio: 8000 bytes/sec, 209 bytes/block
> >
> > Writing AVI index...
> > Fixing AVI header...
> >
> > Video stream:  752.184 kbit/s  (94022 bps)  size: 26183782 bytes
> > 278.483 secs  8341 frames
> >
> > Audio stream:   64.000 kbit/s  (7999 bps)  size: 2227722 bytes  278.465
> > secs
> >