[MEncoder-users] Error message: "Invalid frame duration" - What is causing this and what could be done about it?

[Roger Pryor]

Hi:

I trust that I am asking this in the correct newsgroup - apologies if not.

I'm using a pcHDTV HD5500 HDTV video card, with an analog cable TV input
to record, using mencoder.  The command line is embedded in a shell
script, below, and is simply invoked with a run (duration) time and a
channel number.  Occasionaly, perhaps 1 in 10 times, or perhaps worse, I
get a stream of error messages, below, and a video file that is bad, jumpy
images, possibly field reversed, although I wouldn't recognise that if it
bit me.

I would appreciate advise as to what could be causing this and what could
be done about it.

Thank you


ERROR Message:

Invalid frame duration value (5039.772/5039.562 => -0.210). Defaulting to
0.053 sec.


COMMAND Line:

Command line from the shell script, where S2 is the channel# and $1 is the
running time

> mencoder tv:// \
> -tv
> driver=v4l2:chanlist=us-cable:norm=NTSC-M:device=/dev/video0:input=0:quality=0:width=640:height=480:brightness=20:saturation=20:adevice=hw.0:alsa:channel=
> $2 \ -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000:vratetol=32000:mbd=2
> \ -oac mp3lame -lameopts fast \ -vf
> crop=636:476:2:2,denoise3d=4:3:6,harddup \ -noskip -noencodedups
> -skiplimit 0 -endpos $1 \ -of avi -ofps 30000/1001 -o test.avi


SUCCESSFUL output for a (very) short run

> MEncoder 1.0rc2-SUSE Linux 10.3 (x86_64)-Packman-4.2.1 (C) 2000-2007
> MPlayer Team CPU: Intel(R) Core(TM)2 CPU          6420  @ 2.13GHz
> (Family: 6, Model: 15, Stepping: 6) CPUflags: Type: 6 MMX: 1 MMX2: 1
> 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions:
> MMX MMX2 3DNow 3DNowEx 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: pcHDTV HD5500 HDTV
>  Tuner cap:
>  Tuner rxs:
>  Capabilites:  video capture  VBI capture device  tuner  read/write
> streaming supported norms: 0 = PAL-BG; 1 = PAL-DK; 2 = PAL-I; 3 = PAL-M;
> 4 = PAL-N; 5 = PAL-Nc; 6 = PAL-60; 7 = NTSC-M; 8 = NTSC-M-JP; 9 =
> NTSC-443; 10 = SECAM-DK; 11 = SECAM-L; inputs: 0 = Television; 1 =
> Composite1; 2 = S-Video; Current input: 0 Current format: BGR24
> v4l2: current audio mode is : MONO
> v4l2: ioctl set format failed: Invalid argument
> v4l2: ioctl set format failed: Invalid argument
> Selected channel: 3 (freq: 61.250)
> Channel count not available - reverting to default: 2
> Channel count not available - reverting to default: 2
> [V] filefmt:9  fourcc:0x59565955  size:640x480  fps:29.97  ftime:=0.0334
> ==========================================================================
> 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: [harddup]
> Opening video filter: [denoise3d=4:3:6]
> Opening video filter: [crop w=636 h=476 x=2 y=2]
> Crop: 636 x 476, 2 ; 2
> ==========================================================================
> Opening video decoder: [raw] RAW Uncompressed Video
> VDec: vo config request - 640 x 480 (preferred colorspace: Packed UYVY)
> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> VDec: using Packed UYVY 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 @ 0xd323f0]SwScaler: BICUBIC scaler, from uyvy422 to yuv420p
> using MMX2 [swscaler @ 0xd323f0]SwScaler: using 4-tap MMX scaler for
> horizontal luminance scaling [swscaler @ 0xd323f0]SwScaler: using 4-tap
> MMX scaler for horizontal chrominance scaling [swscaler @ 0xd323f0]
> SwScaler: using 1-tap MMX "scaler" for vertical scaling (YV12 like)
> [swscaler @ 0xd323f0]SwScaler: 640x480 -> 640x480 videocodec: libavcodec
> (636x476 fourcc=34504d46 [FMP4]) [VE_LAVC] High quality encoding
> selected (non-realtime)! Selected video codec: [rawuyvy] vfm: raw (RAW
> UYVY)
> ==========================================================================
> MP3 audio selected. 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: Aspect information not (yet?) available or unspecified, not
> writing vprp header. Writing header...
> ODML: Aspect information not (yet?) available or unspecified, not
> writing vprp header. Pos:   5.0s    150f ( 0%) 28.71fps Trem:   0min
> 0mb  A-V:0.000 [2530:174] Flushing video frames.
> Writing index...
> Writing header...
> ODML: Aspect information not (yet?) available or unspecified, not
> writing vprp header.
> 
> Video stream: 2530.538 kbit/s  (316317 B/s)  size: 1583168 bytes  5.005
> secs  150 frames
> 
> Audio stream:  174.123 kbit/s  (21765 B/s)  size: 108596 bytes  4.989
> secs v4l2: 157 frames successfully processed, 0 frames dropped.


--------------------------------------------------------------------------
Roger Pryor    Email: rpryor at infoserve.net
Vancouver, Canada