[MEncoder-users] MPEG-2 muxer

[Nico Sabbi]

Nicolas Hesler wrote:

>Nico Sabbi wrote:
>  
>
>>Nicolas Hesler wrote:
>>
>>  
>>
>>  
>>    
>>
>>>Can you recommend a method by which you could use Mencoder as the 
>>>encoder, retain sync as much as possible and end up with 2 files (m2v 
>>>and ac3)? 
>>>
>>>Thanks for this.
>>>
>>> 
>>>
>>>    
>>>      
>>>
>>getting the audio and video files is as easy as running
>>mencoder -of rawaudio  and mencoder -of rawvideo
>>on the final mpeg file, but your question shows that
>>you didn't understand the problem: whenever you demultiplex
>>the mpeg file you are likely to introduce desynchrony
>>
>>  
>>    
>>
>Is this desynchrony due poor muxing/encoding on the part of the original 
>encoder?
>  
>

sometimes mencoder doesn't do a good job, especially -o[av]c copy,
but in this case it's simply due to the absence of timestamps in the audio
and video files (only the muxed file has timestamps)

>Is there demultiplex software that can "fix" the streams to be in sync? 
>(if that makes sense)
>  
>

try ffmpeg

>I'm transcoding high bitrate, high res. (1280x720) MPEG2 video to DVD 
>compliant MPEG2 video.  The source contains PCM audio and I'm 
>transcoding to AC3 audio.
>
>I hope I'm not sounding dense. I'd like the understand the problem and 
>learn if there is a solution to this, since several DVD authoring 
>programs only readily accept separate audio and video files.
>
>  
>
becaue throughout dvd authoring software stupidity rulezzz!!!!!!!!!!!!