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Hi.

I got a weird issue, here's what I've done.

The source quicktime file has been captured in 24p. I've encoded this file to avc with DSE.
To synch the 24p video with the subtitles, I've used avisynth. Using the captured quicktime file and an srt file of the subtitle file synched it so it matched perfectly with the .mov file. I had to convert the subtitle file from 25fps to 24fps, did this using Belle Nuit. The new 24fps as I said, match up perfectly with the capture file.
I do my thing to convert it to dostudio format, I've checked to see if the timecodes of the .dost file are the same as the srt file, it is. I then insert them into the feature title in DoStudio. After compile is where it's getting weird, the subtitles keeps dragging, almost as if they're in 23.976fps. At the start they're dead on, at the middle they drag about 2-3 seconds after the video/audio, at the end it's about 5 seconds after the video/audio. Any idea what this can be? Is there a bug in the multiplexer that converts them to 23.976 or something cause I really can't figure this out. I'm certain I converted the file to 24fps, which shows by using this 24fps to synch with the captured file.

Sincerely
Boody

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Actually, to add, the subtitles doesn't drag behind, they drag before the video, which would indicate that they're actually a higher framerate than 24, but not nearly as high as 25, so this just got weirder when I think about it. The DSE encode can't be the problem, because the audio directly from the capture is in synch with the video from the DSE encode.
Can you paste your dost file header in here?
Yes, and that made me think of the solution.

$FORMAT=480
$DROP=23.976
$VERSION=1.2
$ULEAD=TRUE

I changed the drop to 24000, should compile fine now then :)
Another question, is the FORMAT = 480 correct here? Should this be 1080? does it matter that it says 480? The subtitles look fine on the final compile.

Thanks btw Peter, for reminding me of this setting in the Header :)

Boody
You are welcome, BoodyBaggage. I had the same problem a few weeks ago ;-)
As for the 480, I leave it as it is. It looks like an NTSC trash to me, but it doesn't hurt.
Just a follow-up question on this.

As it is now, I convert my 25fps subtitles to 24fps using belle nuit. But, can I instead just make a 25fps dostudio script, and change the drop from 25000 to 24000 instead of converting? Will the DoStudio multiplexer convert all the timecodes correctly?

B
Hi,

You are correct, DoStudio will treat each time code as though it was 24 fps. This should do the job you are looking for.

Cheers,

Denny
Hi,
I have the same problem with the subs running ahead of the feature more and more. However my dost file is set to 23976 and my video encode is 23976 so I am not sure why it does not work. Any ideas? My video is AVC but it also happens with MPEG-2??
Just to add my header file is this:

$FORMAT=480
$VERSION=1.2
$ULEAD=TRUE
$DROP=23976

It is in a different order to the one on this post, but I am pretty sure this is the way it says to do it in the manual. Shall I try the different ordered header??
Hi Chris,

Your header order is ok because the order is not important.

Cheers,

Denny

Hello BoodyBaggage,

I also have to convert subtitles from 25fps to 24fps but couldn't figure out how to do this with Belle Nuit subtitles. Could you tell me how this is done?

Thanks,

Tony


BoodyBaggage said:

Just a follow-up question on this.

As it is now, I convert my 25fps subtitles to 24fps using belle nuit. But, can I instead just make a 25fps dostudio script, and change the drop from 25000 to 24000 instead of converting? Will the DoStudio multiplexer convert all the timecodes correctly?

B

I don't use Belle anymore for DoStudio. I don't remember how the interface looked, but I think it was menu item Tools -> Spotting.

Boody

tony said:

Hello BoodyBaggage,

I also have to convert subtitles from 25fps to 24fps but couldn't figure out how to do this with Belle Nuit subtitles. Could you tell me how this is done?

Thanks,

Tony


BoodyBaggage said:

Just a follow-up question on this.

As it is now, I convert my 25fps subtitles to 24fps using belle nuit. But, can I instead just make a 25fps dostudio script, and change the drop from 25000 to 24000 instead of converting? Will the DoStudio multiplexer convert all the timecodes correctly?

B

We always have to change the header file from 23976 to 24000 for subs to fit despite the actual asset being 23976...

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