[MEncoder-users] The track parameters do not match.

[Pengpeng]

t at pt-laptop:~$ mkvmerge  -o  outfile3  /home/pt/sbd/sbd29  +/home/pt/sbd/sbd30  +/home/pt/sbd/sbd31
mkvmerge v3.0.0 ('Hang up your Hang-Ups') built on Dec 29 2009 00:24:14
'/home/pt/sbd/sbd29': Using the Quicktime/MP4 demultiplexer.
'/home/pt/sbd/sbd30': Using the Quicktime/MP4 demultiplexer.
'/home/pt/sbd/sbd31': Using the Quicktime/MP4 demultiplexer.
'/home/pt/sbd/sbd29' track 1: Extracted the aspect ratio information from the MPEG-4 layer 10 (AVC) video data and set the display dimensions to 576/432.
'/home/pt/sbd/sbd29' track 1: Using the MPEG-4 part 10 (AVC) video output module.
'/home/pt/sbd/sbd29' track 2: Using the AAC output module.
'/home/pt/sbd/sbd30' track 1: Extracted the aspect ratio information from the MPEG-4 layer 10 (AVC) video data and set the display dimensions to 768/576.
'/home/pt/sbd/sbd30' track 1: Using the MPEG-4 part 10 (AVC) video output module.
'/home/pt/sbd/sbd30' track 2: Using the AAC output module.
'/home/pt/sbd/sbd31' track 1: Extracted the aspect ratio information from the MPEG-4 layer 10 (AVC) video data and set the display dimensions to 768/576.
'/home/pt/sbd/sbd31' track 1: Using the MPEG-4 part 10 (AVC) video output module.
'/home/pt/sbd/sbd31' track 2: Using the AAC output module.
No append mapping was given for the file no. 1 ('/home/pt/sbd/sbd30'). A default mapping of 1:1:0:1,1:2:0:2 will be used instead. Please keep that in mind if mkvmerge aborts with an error message regarding invalid '--append-to' options.
No append mapping was given for the file no. 2 ('/home/pt/sbd/sbd31'). A default mapping of 2:1:1:1,2:2:1:2 will be used instead. Please keep that in mind if mkvmerge aborts with an error message regarding invalid '--append-to' options.
Error: The track number 1 from the file '/home/pt/sbd/sbd30' cannot be appended to the track number 1 from the file '/home/pt/sbd/sbd29'. The track parameters do not match.
how can  i  do?