[FFmpeg-user] Problems to transcode the avi(dv25) codec into mpeg2video

[肖波]

hi everyone,


Recently I'm using the latest ffmpeg 1.0 to do some video file transcoding test under Windows 7.
my source file is in avi format, it's video codec is dv25, and I need to transcode it into mpeg2video codec, and then muxing it into mxf format.


I tested with ffmpeg.exe using the following command lines:
ffmpeg.exe  -i test-dv25.avi -c:v mpeg2video -c:a pcm_s16le test.mxf


But I got the following results:
[swscaler @ 00603040] Exactly one scaler algorithm must be chosen, got 0
    Last message repeated 2 times
[auto-inserted scaler 0 @ 00618f20] Failed to configure output pad on auto-inser
ted scaler 0
Error opening filters!


What's the problem? I found the message is in swscale module, but I'm new for ffmpeg,can anybody help me to solve the problem?
My test file is uploaded to:ftp://upload.ffmpeg.org/incoming/test-dv25.avi