[MPlayer-users] [Mencoder][Drop frame]

[Jean Guyader]

Hello,

I try to do some on the fly compression with mencoder. The flow to
encoder is represent here by the file test.ts. In the first case I
compres the file directly and I get 96 frames. But when I use a pipe
between my file and mencoder it does'nt work, I get only 51 frames may
be is because the stream is not seakable. I try with a named pipe it
is the same result. How can I do my convertion on the fly.

Here output of mplayer :
$ mencoder test.ts -o test.avi -oac copy -ovc lavc -lavcopts codec=mpeg2video
MEncoder 2:0.99+1.0pre7try2+cvs20060117-0ubuntu8 (C) 2000-2006 MPlayer Team
CPU: Intel Pentium 4/Celeron 4 Northwood; Pentium 4 EE/Xeon Prestonia,Gallatin
(Family: 15, Stepping: 7)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
91 audio & 204 video codecs
success: format: 0  data: 0x0 - 0x492d2c
TS file format detected.
DEMUX OPEN, AUDIO_ID: -1, VIDEO_ID: -1, SUBTITLE_ID: -2,
PROBING UP TO 2000000, PROG: 0
VIDEO MPEG2(pid=163)NO AUDIO!  NO SUBS (yet)!  PROGRAM N. 0
Opened TS demuxer, audio: ffffffff(pid -1), video: 10000002(pid 163)...POS=188
VIDEO:  MPEG2  720x576  (aspect 2)  25.000 fps  15000.0 kbps (1875.0 kbyte/s)
[V] filefmt:29  fourcc:0x10000002  size:720x576  fps:25.00  ftime:=0.0400
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred colorspace: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Try adding the scale filter, e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
videocodec: libavcodec (720x576 fourcc=3267706d [mpg2])
Writing header...2f ( 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.

1 duplicate frame(s)!
TS_PARSE: COULDN'T SYNC%) 60.90fps Trem:   0min   4mb  A-V:0.000 [9327:0]
Pos:   3.8s     96f (100%) 59.93fps Trem:   0min   4mb  A-V:0.000 [9387:0]
Flushing video frames
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp
header.

Video stream: 9387.760 kbit/s  (1173470 B/s)  size: 4459186 bytes  3.800 secs
96 frames

$ cat test.ts | mencoder - -o test.avi -oac copy -ovc lavc -lavcopts
codec=mpeg2video
MEncoder 2:0.99+1.0pre7try2+cvs20060117-0ubuntu8 (C) 2000-2006 MPlayer Team
CPU: Intel Pentium 4/Celeron 4 Northwood; Pentium 4 EE/Xeon Prestonia,Gallatin
(Family: 15, Stepping: 7)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
91 audio & 204 video codecs
Reading from stdin...
success: format: 0  data: 0x0 - 0x0
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Win32 LoadLibrary failed to load: avisynth.dll, /usr/lib/win32/avisynth.dll,
/usr/local/lib/win32/avisynth.dll
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
Cannot seek backward in linear streams!
Seek failed
TS file format detected.
DEMUX OPEN, AUDIO_ID: -1, VIDEO_ID: -1, SUBTITLE_ID: -2,
Cannot seek backward in linear streams!
Seek failed
PROBING UP TO 2000000, PROG: 0
VIDEO MPEG2(pid=163)NO AUDIO!  NO SUBS (yet)!  PROGRAM N. 0
Opened TS demuxer, audio: ffffffff(pid -1), video: 10000002(pid
163)...POS=102084
Cannot seek backward in linear streams!
Seek failed
VIDEO:  MPEG2  720x576  (aspect 2)  25.000 fps  15000.0 kbps (1875.0 kbyte/s)
[V] filefmt:29  fourcc:0x10000002  size:720x576  fps:25.00  ftime:=0.0400
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred colorspace: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Try adding the scale filter, e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
videocodec: libavcodec (720x576 fourcc=3267706d [mpg2])
Writing header...2f ( 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.

1 duplicate frame(s)!
TS_PARSE: COULDN'T SYNC%)  0.00fps Trem:   0min   0mb  A-V:0.000 [10839:0]
Pos:   2.0s     51f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.000 [10924:0]
Flushing video frames
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp
header.

Video stream: 10924.020 kbit/s  (1365502 B/s)  size: 2731005 bytes  2.000 secs
51 frames

Thanks for your help.

-- 
Jean Guyader