You can use that method to map the drift.Originally Posted by carlmart
If you find you have 0 at the beginning, 4 secs at the middle, 8 secs at the end, then stretching the sound by a 8 secs should resync it.
You don't stretch for a constant delay, you can add (or subtract) a delay with DelayCut. And almost all authoring apps allow you to specify a fixed delay when muxing.
Actually, Audioscale is lossless for AC3 corrections.Originally Posted by carlmart
Using a general sound editor like Soundforge will entail two conversions, (when it opens and when it saves) so it will degrade quality. Probably barely noticeable though. But if you go back to a source file, then it would be no extra loss.
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Originally Posted by guns1inger
But where is that numbpad to adjust the delay with? I must be missing it. Sorry.
It would be great to have some kind of timeline to see that, but I don't know any besides Avid and others. And they do not accept these files. -
In this case the delay is not fixed: things look fine at the beginning and get worst by the end of the movie. What I may try is use your suggestion to see what's the total shift and stretch things more accurately.
Open the .m2v and .ac3 in mediainfo. It will give you a duration. That fraction is the amount you stretch/shrink the audio
e.g.
video 100sec
audio 99sec
You would have to stretch the audio by 100/99. Already mentioned, you can do this in most audio editors. This method will only give accurate values if your streams have no errors. If the header information is damaged, or there are gaps/dropouts/discontinunities, the reported duration might be off. -
Originally Posted by carlmart
It shows the numeric delay below the screen when you change it. -
Originally Posted by poisondeathray
Open the .m2v and .ac3 in mediainfo. It will give you a duration. That fraction is the amount you stretch/shrink the audio
e.g.
video 100sec
audio 99sec
You would have to stretch the audio by 100/99. Already mentioned, you can do this in most audio editors. This method will only give accurate values if your streams have no errors.
If the header information is damaged, or there are gaps/dropouts/discontinunities, the reported duration might be off. -
Try using another media player, eg. smplayer that will also give the the audio delay using the "+" or "-" keys - but again this won't help you in this case, because the audio & video are in sync at the beginning
Approximately how far off is it by the end? 1sec? 5sec?
If you play just the .m2v (in a separate folder from the audio) in a media player, what is the reported duration?
If you do the same with the .ac3 (separate folder from video) in a media player, what is the duration?
If your stream is damaged, you might see a gap during playback, pixellation, or crackles in the audio. Sometimes the error point is where the desychronization occurs (that would explaing it playing fine in the beginning, but not at the end) . The fix might be to cut out the offending section.
There is no sure fire way to identify or fix it. You can try running it as an .mpeg (multiplexed) thru videoredo using the quickstream fix
Examine both the source closely and the output .m2v and .ac3 to see what is different? Did the problem occur in the source file? or during encoding of the audio or video? Trace your steps backwards to see where the error might have occurred -
Originally Posted by carlmart
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Originally Posted by AlanHK
Of course I tried the numberpad on the right, on my desktop. The only results I get are with the "numlock" button on, when I get a zoom in by pressing the +key. -
Originally Posted by poisondeathray
If you play just the .m2v (in a separate folder from the audio) in a media player, what is the reported duration?
If you do the same with the .ac3 (separate folder from video) in a media player, what is the duration?
If your stream is damaged, you might see a gap during playback, pixellation, or crackles in the audio. Sometimes the error point is where the desychronization occurs (that would explaing it playing fine in the beginning, but not at the end) . The fix might be to cut out the offending section.
One thing I am considering, though I don't know if it would work, is to capture the DVD from an external player, and then use the audio.
There is no sure fire way to identify or fix it. You can try running it as an .mpeg (multiplexed) thru videoredo using the quickstream fix
Examine both the source closely and the output .m2v and .ac3 to see what is different? Did the problem occur in the source file? or during encoding of the audio or video? Trace your steps backwards to see where the error might have occurred -
DGPulldown should have no effect on audio sync or file length/running time (which would also affect sync). All DGPulldown does in insert flags into the file that tell the playback device to add in extra frames on the fly without changing the length.
Read my blog here.
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Originally Posted by guns1inger
This progressive asynch with it being OK at the beginning and off a second by the end (is that about right?) is a strange one, though. It could point to a 23.976fps vs a 24fps kind of thing. But never having used AvsToDVD, I wouldn't know if that's even possible when using it.
carlmart, when using MPC or MPC HC, right-click the screen and go Options->Audio Switcher and check to make sure the "Enable Built In Audio Switcher" box is checked. Also, go into View (at the top) and make sure that "Status" is checked. If you're unable to adjust the delay on the fly, almost certainly it's because of one of those 2 things. -
Originally Posted by guns1inger
There seems to be a -650ms audio delay.
But I don't seem to get it right when I go through Audioscale. I must be doing something wrong with it. I tried both adding and deducting .65 from the big total (6321.5 seconds) and every time the sound gets ahead quite a lot. -
Originally Posted by manono
There's a "Cutting" and "Delay" boxes to check and "Start/End" windows to fill in. My audio seems to be behind by 650ms. What should I write down where? -
Originally Posted by manono
This process has nothing to do with AVStoDVD, as it didn't go through it yet.
carlmart, when using MPC or MPC HC, right-click the screen and go Options->Audio Switcher and check to make sure the "Enable Built In Audio Switcher" box is checked. Also, go into View (at the top) and make sure that "Status" is checked. If you're unable to adjust the delay on the fly, almost certainly it's because of one of those 2 things. -
...but I am having some problems loading the data in Delaycut.
Without the DGPulldown correction, if I load the file in MPC reads a 1.50.42 time. The corrected file reads 1.45.21.
This process has nothing to do with AVStoDVD, as it didn't go through it yet. -
Originally Posted by carlmart
If you really are running Win98 as in your profile, that may be the problem.
The key shortcuts can be seen and changed at View/Options/Keys
Otherwise you can get the delay via the menus: Play/Audio/Options. -
Originally Posted by AlanHK
If you really are running Win98 as in your profile, that may be the problem.
The key shortcuts can be seen and changed at View/Options/Keys
Otherwise you can get the delay via the menus: Play/Audio/Options.
I will now make a test with DVD conversion to see how things work out. -
[quote="manono"]
...but I am having some problems loading the data in Delaycut.
Without the DGPulldown correction, if I load the file in MPC reads a 1.50.42 time. The corrected file reads 1.45.21.
As gunsl1inger said, DGPulldown applied correctly doesn't change the video length by so much as a millisecond. I can only conclude that either you're doing it wrong or whatever you're using to tell the length afterwards is wrong. More likely the reported length is wrong as many players and programs can't give the correct length of an M2V.
I wish I would be doing things wrong, because that would mean there is a solution. But there's not much to go wrong on this: demux, apply DGPulldown, convert with AVStoDVD, author with DLP, burn the DVD.
Then why are you doing anything at all with the M2V demuxed with PGCDemux? -
Results on the DVD were quite good. Sync is 98% to 99% accurate, but to go the final mile would be very labor intensive and at least this video has taken a lot of my time and yours too.
It would be great to be able to put video and audio on a timeline and move it until perfect sync. But the programs I am used to, like Avid, are hard to work with and files are quite large, as they take only avi.
A friend mentioned Vegas, but I have no experience with it.
So at least for this film consider it done. Now I will put it through AVStoDVD to go from letterbox 4:3 to 16:9 and author it. -
Now a different problem, also related to how to improve things on another DVD I have which is also letterbox 4:3.
This has no sync problem, as has been the case with the other one. But what it has are some comb effect artifacts that I would like to correct.
What do you advise on using to correct or improve on that that AVStoDVD will incorporate when I do the letterbox 4:3 to 16:9 blow-up? -
Here we go again.
Post a small 10 second sample of the source showing the problem - a sample with movement. Open a VOB in DGIndex. Use the [ and ] buttons to isolate a small section. Then File->Save Project and Demux Video. Upload the resulting M2V to a 3rd party file hosting site - one such as MediaFire - and post the link here. -
If you are converting 4:3 letterbox material to 16:9, in most cases it can be done simply with DVD Rebuilder. It has an option to do exactly this type of conversion. I have used it many times and it has always worked well. It also has the advantage of keeping all the menus and disc structure intact, and only adjusting the video.
That said, I have only ever used it on material that was 1.778 : 1 or wider, and not tried it with 1.66 : 1 material, so I don't know how it will fair in that case.Read my blog here.
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Originally Posted by guns1inger
And carlmart mentioned interlacing. Maybe it needs an IVTC (which DVD-Rebuilder is incapable of performing) or maybe it needs to be unblended (also undoable using DVD-Rebuilder). Or maybe it's a true interlaced source. That's why I asked for a sample. -
Originally Posted by guns1inger
The program I had been using until now for that was Procoder, but when I saw the results I could get with VirtualDub, which uses Avisynth, I guessed there might better options. AVStoDVD certainly was.
I will have a look at DVDRebuilder, even if I don't care at all for the menus and disc structure. Particularly because I am changing the subtitles in many aspects: changing words, realigning lines, etc. Things that I can't do with DVD Sub Edit, for instance.
Even if hopefully there won't be too many films to blow up to 16:9, the flexibility of using HCEnc through AVStoDVD was quite an advance in the right direction. That's why I am now getting bold, looking for other improvements I could add on. -
Originally Posted by manono
http://www.easy-share.com/1903693582/test1.demuxed.m2v
The effect is mostly seen in movements, and if you pause the movement you will see a "shadow" of moving objects in horizontal lines.
Of course all this becomes worst if I wish to blow this up to 16:9 as I want to. -
It's field-blended garbage. The best way to handle it is:
Yadif(Mode=1,Order=1)#or your favorite bobber
RePAL()
And if you want to convert to 16:9:
Crop(0,58,0,-62)
Lanczos4Resize(Width,480)
You can get both Yadif and RePAL here:
http://avisynth.org/warpenterprises/
I don't know how you'd do this using Avs2DVD but, in my opinion, if you're going to be working regularly with stuff like this, you had better learn both AviSynth and encoding manually. Here's your sample unblended and encoded for 16:9, with DGPulldown applied afterwards for 24.975->29.97fps, ready to author (4.07MB):
http://www.mediafire.com/?2mzhvyjwt0n -
Originally Posted by manono
And if you want to convert to 16:9:
Crop(0,58,0,-62)
Lanczos4Resize(Width,480)
You can get both Yadif and RePAL here:
http://avisynth.org/warpenterprises/
I don't know how you'd do this using Avs2DVD
but, in my opinion, if you're going to be working regularly with stuff like this, you had better learn both AviSynth and encoding manually.
Here's your sample unblended and encoded for 16:9, with DGPulldown applied afterwards for 24.975->29.97fps, ready to author (4.07MB):
http://www.mediafire.com/?2mzhvyjwt0n
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