[MEncoder-users] Mp4 to m4v options assistance

[Simon]

Hi There,

We are running a script to encode uploaded mp4 video into m4v for use within
a flash based video player using the following script:

mencoder video_in.mp4 -quiet -o "video_in_temp.264" -passlogfile
"video_in_temp.log -ovc x264 -x264encopts
bitrate=512:frameref=4:bframes=3:b_adapt:b_pyramid=normal:weight_b:partitions=all:8x8dct:me=umh:subq=7:trellis=2:threads=auto:pass=1:analyse=all
-of rawvideo -nosound

This is to encode a video in x264. After this process we extract the audio
and encode it with aacplus and mux it back together.  The video is 406x228
at 25fps. We have an error plus would really like some assistance with some
of the options to make sure we are using them correctly please?

The main error is:

x264 [warning]: b-pyramid + mb-tree is not supported

Is there anything that anyone can see that we can improve on? Also, does
anyone have any good links to assist with understanding some of the other
options?

Many thanks,

Simon

Output of command:

MEncoder SVN-r29962-4.3.2 (C) 2000-2009 MPlayer Team
success: format: 0  data: 0x0 - 0x3a5d4a
libavformat file format detected.
[lavf] Video stream found, -vid 0
[lavf] Audio stream found, -aid 1
VIDEO:  [H264]  406x228  24bpp  25.000 fps  1649.1 kbps (201.3 kbyte/s)
[V] filefmt:44  fourcc:0x34363248  size:406x228  fps:25.000  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: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect..000 [0:0]
x264 [warning]: b-pyramid + mb-tree is not supported
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
x264 [info]: profile High, level 2.0
[h264 @ 0x884ccc0]AVC: Consumed only 11414 bytes instead of 11419[546:0]]
Pos:  16.0s    450f (99%) 25.40fps Trem:   0min   1mb  A-V:0.000 [547:0]
Flushing video frames.

Video stream:  547.604 kbit/s  (68450 B/s)  size: 1229372 bytes  17.960
secs  450 frames
x264 [info]: frame I:3     Avg QP:10.52  size:  9019
x264 [info]: frame P:216   Avg QP:13.36  size:  4433
x264 [info]: frame B:230   Avg QP:17.52  size:  1064
x264 [info]: consecutive B-frames: 22.6% 21.5% 12.8% 43.0%
x264 [info]: mb I  I16..4: 57.4% 15.6% 27.1%
x264 [info]: mb P  I16..4:  3.8%  8.7%  3.4%  P16..4: 21.3% 14.3% 10.3%
2.0%  1.6%    skip:34.5%
x264 [info]: mb B  I16..4:  0.5%  0.6%  0.5%  B16..8: 23.3%  2.0%  2.4%
direct: 3.8%  skip:66.9%  L0:32.2% L1:39.9% BI:27.9%
x264 [info]: final ratefactor: 12.38
x264 [info]: 8x8 transform intra:50.1% inter:39.3%
x264 [info]: coded y,uvDC,uvAC intra: 47.9% 61.0% 54.1% inter: 18.1% 21.9%
12.8%
x264 [info]: i16 v,h,dc,p: 61% 20% 14%  6%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 17% 39%  3%  3%  2%  9%  3%
6%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 22% 26%  3%  5%  3% 10%  2%
4%
x264 [info]: Weighted P-Frames: Y:13.0%
x264 [info]: ref P L0: 67.8% 10.7% 13.7%  3.6%  3.8%  0.3%
x264 [info]: ref B L0: 88.4%  8.3%  3.2%
x264 [info]: kb/s:547.60