[MPlayer-users] Re: Mencoder - video buffer full after ~4 mins. of recording (James Lancaster)
wodz at soliton.ch.pw.edu.pl
Tue Mar 11 20:23:38 CET 2003
Uz.ytkownik Ken Fuhrman napisa?:
>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>>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
>>>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
>>>Any comments on why this is happening...I would love to use mencoder to
>>>record longer video programs ;)
>>>-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
Your system i s definitly too slow for realtime encoding. VIA C3 are
known to be very slow in coding.
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