error when transcoding to h263 and the reason I think
Posted: 29 Mar 2007 11:20
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:
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,
and the error message in the activated dialog is:
and the key message in the console is:
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:
This time, I got a well h263/avi file! 
But, I still can not stranscode to a h263/ts file.
Code: Select all
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)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,
Code: Select all
./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263}:standard{access=file,mux=ts,dst=ATCA_video_263.ts}'Code: Select all
./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263}:standard{access=file,mux=avi,dst=ATCA_video_263.avi}'Code: Select all
streaming/stranscoding failed:
vlc could not open the encoder.Code: Select all
[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))Code: Select all
./vlc -vvv ATCA_video.mpg --sout '#transcode{vcodec=h263,width=352,height=288}:standard{access=file,mux=avi,dst=ATCA_video_263.avi}' But, I still can not stranscode to a h263/ts file.