Quote:
Originally Posted by Zathor
Are you able to upload a sample file? I would like to reproduce it.
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Hi, Zathor!
This is not a problem in the h.264 video stream, but in the chapters markers time positions. And also there is no video/audio sync issue.
With a small sample you would not be able to notice it, since the error becomes noticeable only after minutes of video.
I can't upload minutes of copyrighted video.
The error in chapters positions is:
((60000/1000fps / 60000/1001fps) - 1), which is equal to
((1001/1000) - 1), which is equal to
(1.001 - 1), which is equal to
0.001, which is equal to
0.00001%
So:
- In 1 minute (60 seconds) of video, the error in chapters positions is only 60 seconds * 0.001, which is equal to 0.06 seconds.
- In 17 minutes of video, the error in chapters positions becomes more noticeable, about 1 second of error
MeGUI puts inside the 59.94fps (or 29.97fps) h.264 output the chapters positions as if the video was going to be played at 60fps (or 30fps).
I guess it doesn't affect PAL DVDs because in PAL there is no dual fps (for example, there is no 24.97fps versus 25 fps). PAL is just 25fps, there is no 24.97fps.
I'm just playing the NTSC DVD "ABBA in Japan" here and:
- My Sony Blu-Ray player plays the DVD using 60fps, not 59.94fps, so chapter 14 ("Thank You for the Music" song) starts on DVD at 00:50:00 (hh:mm:ss)
- On the HandBrake M4V's 59.94fps file, chapter 14 starts on 00:50:03 which is 3 seconds later, but since the video reproduction is also 0.00001% later because it plays 0.00001% slower in 59.94fps than in 60fps, the HandBrake M4V's chapter 14 starts exactly in the same video position as when the DVD is played on Blu-Ray player
(all my DVDs are the originals, not DVD-R copies or pirates)
Well, it's interesting that my Sony Blu-Ray player plays NTSC DVDs using 60fps and not 59.94fps...
So, what's the correct fps to playing NTSC DVDs?
59.94fps?
Or 60fps?
Maybe Sony is wrong and the rest of the world is correct...