[MPlayer-users] Cutting DVD video with the '-sb' and '-endpos' options

[Jonathan Busby]

RC wrote:
> On Sun, 29 Mar 2009 10:09:54 -0500
> Jonathan Busby <jonathanbusby at gmail.com> wrote:
>
>   
>> Unfortunately the part(s) of the source video
>> that I marked to be encoded using Mplayer with '-edlout' , 'i' and
>> '.' for frame-stepping do not correspond (...) to the part(s) encoded
>> in the output video.
>>     
>
> Your description is very hard to follow.  If you are saying that you are
> frame-stepping to get to the frame in question, then hitting "i" to
> generate an EDL entry, I can see why that wouldn't work as expected. 
> You may want to try using -edlout with -nosound, or perhaps a low
> enough speed value that you can hit "i" accurately without pausing and
> frame-stepping through the video.
>   
That's what I was saying ie. I navigate to a position, say, a
second before the frame at which I want to use 'i' to place
the starting cut entry, and then I frame step using '.' until
the desired frame shows up. At this point I press 'i'. I don't
see any other way to do it, unless you're Spiderman :).

> If you still can't generate an accurate EDL file, you may try editing
> the values by hand, or use some other app to generate the EDL file. 
>   

The problem is that all the software I have in my repertoire
has either a) an audio de-synch issue with the source video
or b) an issue understanding the source video, for example,
Cinelerra.

>  
>   
>> I've repeated the above only to get the same *exact* results -- the
>> timestamps produced by pressing 'i' with the '-edlout' option using
>> Mplayer do not correspond to *absolute* timestamps. That is,
>> whenever there is a progressive<->interlaced transition in the
>> source video that results in a frame rate change the video timestamps
>> often get skewed eg. either by being reset, or jumping backwards.
>>     
>
> Yes.  Which is exactly what -hr-edl-seek exists to fix.
>   

The problem must lie then in the inaccurate timestamps
generated by Mplayer and subsequently written to the EDL
file. See the attached text file for an example. :)

>   
>> So, unless I'm missing something really obvious, it seems that the
>> utility of using Mplayer as a cutting tool for non-progressive video
>> is nil.
>>     
>
> MEncoder isn't designed to be a video editor.  It does just happen to
> work well for many of us, however.
>
> Why do you insist on using MEncoder when there are REAL video editors
> out there (and I certainly don't mean Avidemux)?
>
>   
Please suggest a video editor besides Cinelerra or Avidemux
that is free and runs on Linux natively -- I haven't found
anything else that is suitable, but again I don't know much
about the video editing scene. :)

Jonathan


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