[MEncoder-users] Bug Report: MEncoder - Missing Frames encoding H.263(+)

[Wiese, Hendrik]

Mplayer & MEncoder CVS 20060511:

Linux ISTS 2.6.14.1-ILX-5.0.70-DPN-TEST #23 SMP PREEMPT Thu Mar 2 12:32:21
CET 2006 i586 GenuineIntel unknown GNU/Linux

-rwxrwxrwx  1 root root 1397168 Jul 26  2004 /lib/libc-2.3.3.so
-rwxrw-rw-  1 root root 1397168 Jul 26  2004 /lib/libc.so.6

Reading specs from /usr/lib/gcc-lib/i586-pc-linux-gnu/3.3.3/specs
Configured with: ../gcc-3.3.3/configure --prefix=/usr --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-languages=c,c++
Thread model: posix
gcc version 3.3.3

GNU ld version 2.14 20030612

GNU assembler version 2.14 (i586-pc-linux-gnu) using BFD version 2.14
20030612

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 1
model name      : Intel(R) Pentium(R) 4 CPU 1.70GHz
stepping        : 2
cpu MHz         : 1695.527
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
bogomips        : 3393.06

Please download http://www.syncro-community.de/downloads/foreman.zip (7MB,
11MB uncompressed AVI file inside) for this test!
 
By using
 
bash# mencoder -ovc lavc -lavcopts vbitrate=128000:vcodec=h263p foreman.avi
-of rawvideo -o foreman.h263
 
and redecoding the stream with
 
bash# mencoder -ovc raw foreman.h263 -o foreman-new.avi
 
there are several frames missing at the end.
 
Outputs
-----------
 
Encoding:
 
.
.
.
Pos:  10.0s    150f (99%)  0.00fps Trem:   0min   0mb  A-V:0.000 [158:0]
Flushing video frames
 
Video stream:  158.260 kbit/s  (19782 B/s)  size: 197825 bytes  10.000 secs
150 frames
---------
 
Decoding:
 
.
.
.
VDec: vo config request - 176 x 144 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
Writing header...
ODML: vprp aspect is 4:3.
Writing header...
ODML: vprp aspect is 4:3.
Pos:   9.9s    149f (99%)  0.00fps Trem:   0min   5mb  A-V:0.000 [4561:0]
Flushing video frames
Writing index...
Writing header...
ODML: vprp aspect is 4:3.
 
Video stream: 4561.920 kbit/s  (570240 B/s)  size: 5664384 bytes  9.933 secs
149 frames
 
-----------------------
 
See there's 1 frame missing (encoding 150frames, 10.0secs - decoding 149
frames, 9.933secs)

Other bitrates result in more missing frames. Try 64000 for example! Or
incredibly low bitrate of 4! 

Is it my mistake or is this a bug in mencoder?


Thanks
H.Wiese
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