error when transcoding to h263 and the reason I think

[solar.gg]

when I use vlc.0.8.6(windows install version) to transcode a mpeg2/ps file to h263 format, I got the following error message:

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ffmpeg error: cannot open encoder stream_out_transcode error: cannot find encoder ((null)) stream_out_transcode error: cannot create video chain main error: cannot create packetizer output (mpgv)

what ever using ts or avi to encapsule it.

I have traying some other input format, like h264 and mpeg1, the same error message got.

Later, I compiled vlc.0.9.0 using Cygwin successfully, and using following 2 commands to stranscode a mpeg2/ps file to h263 format, but I still got a error,

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./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263}:standard{access=file,mux=ts,dst=ATCA_video_263.ts}'

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./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263}:standard{access=file,mux=avi,dst=ATCA_video_263.avi}'

and the error message in the activated dialog is:

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streaming/stranscoding failed: vlc could not open the encoder.

and the key message in the console is:

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[00000412] packetizer_mpegvideo packetizer debug: size 320x240 fps=29.970 [00000316] main stream output debug: adding a new input [00000317] stream_out_transcode private debug: creating video transcoding from fcc=`mpgv' to fcc=`h263' [00000413] main decoder debug: looking for decoder module: 26 candidates [00000413] main decoder debug: using decoder module "libmpeg2" [00000414] main encoder debug: looking for encoder module: 10 candidates [00000414] ffmpeg encoder debug: libavcodec initialized (interface 3348736 ) [00000414] ffmpeg encoder debug: The specified picture size of 320x240 is not valid for the H.263 codec. Valid sizes are 128x96, 176x144, 352x288, 704x576, and 1408x1152. Try H.263+.(h263@00C14950) [00000414] ffmpeg encoder error: cannot open encoder [00000312] main interface error: option errors-dialog does not exist [00000317] stream_out_transcode private error: cannot find encoder ((null))

This time, I found that the reason of this error is the video size of the source file can not be surported by H.263 and ffmpeg still do not surport H.263+, so I change my command like this:

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./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263,width=352,height=288}:standard{access=file,mux=avi,dst=ATCA_video_263.avi}'

This time, I got a well h263/avi file!
But, I still can not stranscode to a h263/ts file.