[MPlayer-users] Having trouble producing mpeg from mov

[Philip Walden]

Philip Walden wrote:

> The Wanderer wrote:
>
>> Philip Walden wrote:
>>
>>> I am trying to convert some mov files with no audio to mpeg for
>>> better compression.
>>>
>>> When do:
>>>
>>> mencoder -of mpeg -ovc lavc -lavcopts vcodec=msmpeg4v2 -o
>>> PC290052.mpg PC290052.MOV
>>>
>>> and try mplayer to see the result I get:
>>>
>>> Playing PC290052.mpg.
>>> Win32 LoadLibrary failed to load: avisynth.dll, 
>>> /usr/lib/win32/avisynth.dll, /usr/local/lib/win32/avisynth.dll
>>> MPEG: Missing video stream!? Contact the author, it may be a bug :(
>>> libavformat file format detected.
>>> LAVF: no audio or video headers found - broken file?
>>>
>>> When I drop the "-of mpeg" option (which I understand now creates an
>>> avi container) the result can be played back with mplayer. [In
>>> addition I can real player, window media player to play it, but
>>> quicktime lock up! separate issue]
>>>
>>> What am I doing wrong?
>>>
>>> Below is the mencoder log with the "-of mpeg" option that appears to
>>> cause the problem.
>>> =====================================
>>>
>>> $ mencoder -of mpeg -ovc lavc -lavcopts vcodec=msmpeg4v2 -o
>>> PC290052.mpg PC290052.MOV
>>
>>
>>
>> <snip>
>>
>>> Writing AVI header...
>>
>>
>>
>> Okay, this is a problem right there. Since you specified -of mpeg, there
>> should be no "AVI header" involved. I do not get a corresponding message
>> with the same set of options and a random MOV file I happen to have
>> sitting around (for which I specify -noaudio to duplicate your situation
>> as closely as possible). This is with MPlayer/MEncoder from CVS as of
>> the 27th.
>>
>> If I try to play the resulting file with no MPlayer options, I get the
>> same messages you do up through "may be a bug", then it falls back on
>> XMMS plugins trying to demux the file. If I explicitly specify -demuxer
>> 35, I then get the "broken file?" message you describe.
>>
>> I suspect that the MEncoder output you gave and the MEncoder command
>> line you provided do not go with one another. However, the problem
>> appears to exist regardless.
>>
> No fooling, the output from the "$ mencoder -of mpeg ... " and on was 
> cut-n-pasted directly from the terminal window. So there is no chance 
> that I mucked it up. However, I doubled checked now and have the same 
> output results.
>
> I also tried adding an -audiofile with acodec=mp2, but I get the same 
> bad results indicating an AVI header is being written.
>
I have downloaded dev-CVS-060106 and attempted to produce mpeg and avi 
files with mpeg compression with very mixed results. You all may want to 
check this out

For avi container with mpeg video:
   mencoder -ovc lavc -lavcopts vcodec=<see table below> -o PC290052.avi 
PC290052.MOV

vcodec            |   -o file sz   |   mplayer   |   realplayer10        
|   MS media player   |   Quicktime7
mpeg1video   |   3028430    |   works      |   fails                   
   |   fails                        |   crashes
mpeg2video   |  3027836    |    works      |   needs new codec  |   
needs new codec     |  needs new SW
msmpeg4v2   |  3013762    |  works        |   works                   
|   works                      |   needs new SW


For mpeg container with mpeg video:
    mencoder -of mpeg -ovc lavc -lavcopts vcodec=<see table below> -o 
PC290052.mpg PC290052.MOV

vcodec            |   -o file sz   |   mplayer   |   realplayer10        
|   MS media player   |   Quicktime7
mpeg1video   |   3051524    |   works      |   fails                     
|   crashes                    |   not recognized
mpeg2video   |   3051524    |   works      |   fails                     
|   fails                        |   not recognized
msmpeg4v2    |  2052 !!!!    |   no video  |    needs new SW    |   
needs new SW       |   not recognized