[MPlayer-users] Mencoder - video buffer full after ~4 mins. of recording
james at kirk.math.twsu.edu
Tue Mar 11 06:32:12 CET 2003
On Monday 10 March 2003 19:19, you wrote:
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.
> [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
> 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
> -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
> 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 ->
> 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
> RTFM!!! http://www.MPlayerHQ.hu/DOCS
> Search: http://www.MPlayerHQ.hu/cgi-bin/htsearch
More information about the MPlayer-users