[MPlayer-users] Question about H.263 encoder using mencoder

[Weilin Chen]

1. I am sorry about the unclearly question before. I try the command
   " mencoder ./foreman_cif.yuv -ovc lavc vcodec=h263 -o outfile.263"
   the encode file is yvu420 format, and the result as shows below:
  = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
  MEncoder 1.0pre7try2-3.3.4 (C) 2000-2005 MPlayer Team
  CPU: Intel  (Family: 8, Stepping: 1)
  Detected cache-line size is 64 bytes
  CPUflags: Type: 8 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
  Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

  File not found: 'frameno.avi'
  Failed to open frameno.avi
  success: format: 0  data: 0x0 - 0x2b81800
  libavformat file format detected.
  picture size invalid (0x0)
  LAVF_header: av_find_stream_info() failed
  ======== Sorry, this file format is not recognized/supported  =======
  === If this file is an AVI, ASF or MPEG stream, please contact the
author! ===
  Cannot open demuxer.

  Exiting...
 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
it's look like can't decode the yuv file, or somting I loss append to
the command line?

 2. I try to modify the file ./libavcodec/apiexample.c to encode the
    YUV stream using H.263 codec, and the input sequence format is
    YUV420P. I have checked the encoded file header informations, and
    those are all correct, but when I try to decode the encoded stream.263
    within apiexample function "video_decode_example," it's cannot be
    decoded correctly, is't can be use to encode the YVU stream and
    decode the h.263 stream correctly?