![]() It's in sync beginning and end, wanders in and out during the middle.īest I could do without dividing it into pieces Used offset and time stretch (Change Tempo in Audacity) I know you are saying that dropped frames wouldn't affect duration, but wouldn't it technically? for instance, if I were to remove 10 frames, that means there's 10 less frames of video, and wouldn't it technically cause the audio to eventually become out of sync, because those frames are in one of the videos, but not in the other? Within 10 seconds or so, of the video being in sync, I notice the sync start to drift away (while playing side by side). The start time is slightly different, just because of the intro start point, but again, I've been using avidemux to sync, so i'm seeing the audio and video at the same time, and syncing it up. I would find 2 frames that you can identify, one as close to the start as possible and one as close to the end.įind these frames in each version of the movie and see how many seconds offset they have Alright, I did what you said, it's actually a show, not a movie: The 5 second difference assumes, of course, the exact same cut of the movie. You don't need to remove the frames because they don't affect the running time. Sorry for all the questions, just trying to learn. Is there a problem with muxing audio from a 23.976 fps video to a 59.940fps video just in general? does frequency play a factor in that as well? If one is 48.0, and the other is 44.1Khz, would that alone cause an issue? or can all of those things be mixed without issue, and an issue like this would solely have to be the result of the actual video being sped up/slowed down and missing frames? I guess i could technically go frame by frame, and see where the break lies, but that may take a while. Which makes me think that the video is either sped up/slowed down slightly, or there's some dropped frames that aren't noticeable during playback. I've played the videos side by side, and they stay in sync for 10 seconds or so, and then slowly lose sync, but there's no "scene" change, commercial breaks, nothing, it's just in the middle of a scene. There's a 14 second difference between the videos, but that's just because of the end credits on one of the videos, which goes on a little longer. Or it may be arbitrary (the possibilty of extra scenes, closing or ending titles,etc.) I definitely see what you're saying, but I can confirm it's not that, or at least nothing significant. But the length may give a clue as to what to target, it may infer a difference due to to slowdown/speedup (frame rate related) I skim through the video, and if everything is in sync, then it's all good, and if not, I splice the video at the moment it starts going out of sync, and i adjust the audio once again, and so on. I normally use avidemux, sync the audio, and go from there. The running time of the original and the running time of the new audio I've done this before, but I don't rely on matching lengths. You say you've done this before, yet you have not mentioned one of the most the most important things: I'm wondering if there's any way to correct this, and if not, does anybody know of a better method to splice the files in 10 second increments and merge them? avidemux often has issues with precise cuts, and relies on keyframes most of the time, and that wouldn't work out. I've ran into this problem before, but never looked into it, so I figured I'd ask this time. I work with a few different tools when I mux audio avidemux, mkvtoolnix, and audacity. Essentially what happens is, I sync up the audio, and it seems to be synced for about 10 seconds or so, and then it loses sync (this is while i'm working on it using avidemux). ![]() I also converted the video 1 fps, to match video 2, but no luck. I've converted the audio frequency of video 2, to match video one, but that didn't do it. I assume this has something to do with the audio/video possibly being sped up or slowed down, and a ntsc vs pal issue, but not positive. I'm by no means an expert, but I have some experience with muxing/syncing, but can't figure this one out. ![]() I'm trying to take a foreign dubbed video, and mux in an english audio track. Wasn't sure where to put this, as I guess it's technically a video question too, but this seemed more fitting. Alright, So I figured I'd come to the experts on this one.
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