[ExtractStream] divx and extractstream...so close and yet so far...

[Michael Loftis]

I just don't split crap up anymore. They never re-sync properly

I've been using tyconvert and mfs_export or mfs_stream, once tyconverted 
I use tmpegenc to concat multiple parts together in MPEG format, then I 
use flask to recode it as DivX.

Any time I split them into seperate A/V streams they never stay in sync.

oddmanout67 wrote:

>I was just curious if anyone else is needing to use a rather large 
>offset for audio in order to get reasonable sync (I usually end up 
>with -600 to -400 ms). The offset values I get from splitting raw ty 
>files are only very rarely even close. I've used extractstream and 
>splitstream for a long time, but have recently started trying 
>mfs_stream and vsplit. The first time using mfs_stream/vsplit was 
>pretty much right on, but since then it's way off each time, just 
>like extractstream/splitstream was. 
>
>I've been converting everything to divx using this method: First, I 
>extract the raw ty file and split it. The audio I load into winamp 
>and save out as mp3, which I then open in mp3gain to normalize the 
>volume. The video I compress using Gordian Knot/Nandub. Once the 
>video and audio are finished, I load both into Nandub and check the 
>frame rate option. I compare the current frame rate and what the 
>frame rate would need to be adjusted to in order for the audio and 
>video to match. I divide the total number of video frames by each of 
>the two rates to estimate the length of both audio and video. I take 
>the difference and use that to offset the start of the audio. The 
>values I get are usually between -400 and -600 ms (unless there's 
>something wrong with one of the files). I know this is kind of a 
>strange way to go about it, but it's the only way I can get my audio 
>even remotely close to being in sync. 
>
>My question is...the offset values I'm getting seem to be quite a bit 
>different than everyone else, and if I could just use the offset 
>values from splitting the ty file, it would save a few steps in this 
>process. 
>
>How can I improve what I'm doing? 
>
>Thanks!
>
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