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Topic: Change frame rate? (Read 2228 times)
mp666
Newbie
Posts: 20
Change frame rate?
«
on:
January 22, 2010, 10:27:43 am »
Yes, I looked at the FAQs but there is nothing about changing the frame rate. The movie file is at 23.98 FPS. The SRT file is at 29.97. In other words, the sync difference changes as the movie plays.
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #1 on:
January 23, 2010, 12:21:44 pm »
Although you can transcode the frame rate, the philosophy is not to change the rate, but to load it with the correct value.
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mp666
Newbie
Posts: 20
Re: Change frame rate?
«
Reply #2 on:
January 28, 2010, 08:36:47 am »
OK, 'nuf of philosophy. How do I correct an SRT file so it plays in sync with the video? Can Jubler do this?
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #3 on:
January 28, 2010, 09:56:30 am »
Use Recode from the Tools menu.
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effemmeffe
Newbie
Posts: 20
Re: Change frame rate?
«
Reply #4 on:
January 29, 2010, 02:50:42 pm »
Quote from: teras on January 23, 2010, 12:21:44 pm
Although you can transcode the frame rate, the philosophy is not to change the rate, but to load it with the correct value.
That is a curiosity I always had, but never found the time to check, so I'l just ask.
If I open a .srt file and I change the frame rate in the initial window, Jubler changes all the times according to the frame rate I chosed?
So, if I have a subtitle file and a video file which doesn't match together I can try to open the subtitle file with different frame rates until I find the right one? (altough maybe I'll need to shift time)
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #5 on:
January 30, 2010, 09:58:08 pm »
Quote from: effemmeffe on January 29, 2010, 02:50:42 pm
If I open a .srt file and I change the frame rate in the initial window, Jubler changes all the times according to the frame rate I chosed?
No, because SRT is not a frame-rate based file format. It practically does nothing.
See for example the save file dialog, and try to select different subtitle formats.
Quote
So, if I have a subtitle file and a video file which doesn't match together I can try to open the subtitle file with different frame rates until I find the right one? (altough maybe I'll need to shift time)
No, if it is in SRT you need to recode, either with the tool window or with the help of mplayer (as shown in FAQ).
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phase5
Newbie
Posts: 8
Re: Change frame rate?
«
Reply #6 on:
February 02, 2010, 10:50:23 pm »
Quote from: mp666 on January 22, 2010, 10:27:43 am
Yes, I looked at the FAQs but there is nothing about changing the frame rate. The movie file is at 23.98 FPS. The SRT file is at 29.97. In other words, the sync difference changes as the movie plays.
Hey, I had to do this yesterday. Except it was a 23.98 FPS to 25 FPS as I'd upscaled and format converted an avi to MPEG2 PAL.
Start Jubler.
Open the SRT file.
Select all the subtitles.
Then, like the man said, use TOOLS -> RECODE.
Then fill in 23.98 to 29.97. May take a minute or so to complete.
I saved the recode file as an "slt" for use in DSP4.
Dropped in the assests and that was it. Took all of 10 minutes.
Worked well for me. Subtitles in the right place.
Have fun.
«
Last Edit: February 02, 2010, 10:53:39 pm by phase5
»
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #7 on:
February 03, 2010, 10:04:56 am »
By the way, SRT subtitles
should NOT
have any problems with the frame rate, by definition.
If they do, it means that the subtitles are bad made.
Or probably badly converted from some other format.
In other words, SRT subtitles that need their frame rate corrected, means bad subtitles.
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mp666
Newbie
Posts: 20
Re: Change frame rate?
«
Reply #8 on:
February 24, 2010, 03:42:16 am »
OK, they are bad. That is academic info, not helpful. You must realize that 90% of the folks using Jubler are dealing with a video file and an SRT file that did not come from the same source. That's just the idiotic situation we have. If a torrent has both the AVI file and the SRT file that were extracted by the same person from the same DVD, it's a day made in heaven. The reality is that those days are few and far between. One person extracts an AVI file from his DVD, but does not extract any subtitles. Then he posts a torrent for just the video file. Another person extracts a subtitle file, but does not extract any video file. Then he uploads that file to
www.allsubs.org
or similar site. When we get the two files together, we find that either they came from different DVD versions that have different length introductory material (requiring that we use Jubler to add or subtract X number of seconds from every entry in the subtitle file), or the first entry is in sync, but as the movie plays, the subtitles begin to lag farther and farther behind. Get it? We are looking for a solution to the latter issue.
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #9 on:
February 24, 2010, 01:15:34 pm »
Well, I am academic and I built Jubler for academic reasons.
Probably if some people were thinking more about fixing things, than hide them underneath the rug, things will be better.
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mp666
Newbie
Posts: 20
Re: Change frame rate?
«
Reply #10 on:
March 24, 2010, 02:34:37 am »
I'm no software developer, but it seems to me this is primarily an issue of mathematics. When an SRT file shows a predictable increase or decrease in the time that should be added from one entry to the next, a formula could adjust for that. I'm not talking about adding some exact number of seconds to each entry, but using a scale such that a time of 00:10:05,100 in the movie would compute to 00:10:09,400 in the SRT, and a time of 00:20:08,100 in the movie would compute to 00:20:19,300 in the SRT. Once you have found at least three time differences, the formula would be able to find Y (an SRT time) for any X (a movie time). For example, I have a movie (A Tree Grows in Brooklyn) that has the last word spoken at 02:08:00, but the same last word is shown in the SRT at 02:02:53. The first words spoken exactly coincide. I know the SRT is "wrong", but unless I rewrite it by hand or use some application that can make the adjustment, I'm out of luck, because all the SRT files I find are the same.
«
Last Edit: March 24, 2010, 02:48:01 am by mp666
»
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roxannpark
Newbie
Posts: 2
Re: Change frame rate?
«
Reply #11 on:
August 18, 2010, 03:54:05 pm »
despite the fact you can transcode the frame rate, the logic is not to change the rate, instead to load it with the correct value.
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natechupa
Newbie
Posts: 6
Re: Change frame rate?
«
Reply #12 on:
August 19, 2010, 12:14:52 pm »
OK, they are bad. That is academic info, not helpful. You must realize that 90% of the folks using Jubler are dealing with a video file and an SRT file that did not come from the same source. That's just the idiotic situation we have. If a torrent has both the AVI file and the SRT file that were extracted by the same person from the same DVD, it's a day made in heaven. The reality is that those days are few and far between. One person extracts an AVI file from his DVD, but does not extract any subtitles. Then he posts a torrent for just the video file. Another person extracts a subtitle file, but does not extract any video file. Then he uploads that file to
www.allsubs.org
or similar site. When we get the two files together, we find that either they came from different DVD versions that have different length introductory material (requiring that we use Jubler to add or subtract X number of seconds from every entry in the subtitle file), or the first entry is in sync, but as the movie plays, the subtitles begin to lag farther and farther behind. Get it? We are looking for a solution to the latter issue.
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teras
Administrator
Hero Member
Posts: 633
Re: Change frame rate?
«
Reply #13 on:
August 19, 2010, 03:56:41 pm »
If you read the FAQ, you'll see that there is an easy solution for this problem.
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