[MEncoder-users] Skipping frame! and duplicate frame(s)! problems

[Jonathan]

RC wrote:
> On Fri, 10 Jun 2005 20:25:40 -0400
> Jonathan <jonathan at kc8onw.net> wrote:
> 
> 
>>   While trying to encode some of my DVDs for portability purposes
>>I've run into problems with a lot of skipped and duplicated frames.
> 
> 
> I see that you've got a few duplicate frames, and skiped frames,
> but I don't see a problem.

In the areas where this happens the output is horribly 
interlaced/telecined and farther into the source it starts skipping 
frames every 5-10 frames and went on doing so for over 500 frames before 
I killed the encode.

I just stepped through a large portion of that section and it is all 
very short <20 frames telecined clips and even with vf pullup,softskip I 
still see a lot of skipped frame messages.  The output does look a lot 
better with the pullup filter but still not perfect, although given the 
source material it does do a really good job.

> 
> Why do you think a few skiped/duplicate frames is a problem?
> 
I'm okay with a few, like in the very beginning, but it looks like it is 
going to wind up skipping 100's of frames.  I guess I don't like the 
messages because they seem like error messages, especially with the "!", 
and it makes me feel like I'm losing video quality because of them.

> 
>>As you can see below mencoder changes the framerate which leads to a
>>lot of skipped frames.  Does the framerate really need to be
>>changed?  
> 
> 
> mencoder doesn't really change the framerate per-se, it's just informing
> you that the framerate of the source video has changed.
> 
Is that hardcoded into the video stream or is it just something mencoder 
figures out?

Of course I feel rather stupid for not checking the effects on the 
actual playback before sending an email but I guess thats what I get for 
sending mail when tired :P  I still have not checked the effects on 
encoded material but thats partly a time issue, H.264 is *really* nice 
but a bit slow!

Thanks for putting up with yet another mencoder n00b,
Jonathan