divx3 encoding with VirtualDub

[Driber]

I read somewhere on this forum that VirtualDub can encode video with DivX3, but I don't see it in the list of codecs when I go to Video > Compression
there is only DivX Pro 5.11

is there some plugin I can download to use with VirtualDub?

I need DivX3 to cut a video (that was compressed with DivX3) in two parts, and it only lets me cut it at keyframes, so I need to re-compress all the frames between 2 keyframes where I want to make the cut

[JjMon]

You need this codec... https://www.videohelp.com/tools?tool=DivX_3.11

[celtic_druid]

For DivX3 encoding I would actually suggest ffdshow or if you want to use the actual DivX311alpha codec, then use NanDub. Still for a small section it probably wouldn't make much difference. Just that DivX3 pretty much sucked till NanDub came along.

[Driber]

Ok nandub did the trick.

But now I have a split-second audio gap at the point where I joined the frames back together

Is this normal or can it be avoided somehow? I'd hate having to re-encode the entire movie

[manono]

Hi-

No, you shouldn't have to reencode. But I'm not entirely clear about your problem. After you got done you had 2 parts of the video, and the audio for both was in synch? And you then joined them together and the audio for the 2nd part was out of synch? Is that right?

If so, you then have to find just how much the 2nd part is out of synch after joining, and then throw the 2nd part off by that amount before joining, so it'll be in synch after the join. Make sense? Here's how to do it:

Open the joined AVI in Media Player Classic and go to some talking in the out of synch 2nd part. Right-click the screen and go Options->Filter->Audio Switcher->check the "audio time shift" box, and fill in an estimate of the amount of asynch. Hit "Apply" and test it out. Negative values are to make the audio play earlier. 1000 ms= 1 second. Resume playback. Adjust until you get it right. At that point you'll know how much the audio is out of synch and how much to set the delay in Nandub. Then open the unjoined and in synch 2nd part AVI in Nandub making sure to set the video for Direct Stream Copy, and set the delay. I no longer have Nandub installed, so I forget exactly how to do it. Audio->Interleave->Audio Skew Correction, or something like that. OK your way out of there, go File->Save As, give it a new name, and wait a minute or 2. It'll be out of synch when done, but when joined with part 1, the whole thing should be in synch.

When all done, either uncheck the box or set the audio time shift back to 0 in MPC.

[Driber]

no, there is no synch problem, but like I said, a split-second audio GAP

I wanted to split a video into 2 at a precise moment (and not having to rely on keyframes) so here's what I did:

-I split a video into 3 parts using virtualdub
-I then cut part 2 into 2 parts (with re-encoding) with nandub to make a precise cut in the middle
so now I have 4 parts: part 1 direct stream copy; part 2 re-encoded; part 3 re-encoded; part 4 direct stream copy, all in chronological order
-I then open part 1, append part 2 and save it as file A (virtualdub, direct stream copy)
-I then open part 3, append part 4 and save it as file B (virtualdub, direct stream copy)

Now, file A is ok, but when I play file B there is a moment of SILENCE (0.5 seconds or so) at the part where I joined part 3 and part 4 together

[manono]

I guess I did misunderstand, didn't I?

How's this idea then:

Join parts 1, 2, 3, and 4 together, all without audio. Direct Stream it and save with a new name. Take the original complete audio which you've demuxed from the original video and add it to the now reencoded and rejoined video. At that point you'll have the complete video, but with a new keyframe where you want to split it, as a result of the reencode, and the original gapless audio. Now split it. I don't see how an audio gap can be created by doing that. Actually, I don't understand how a half-second audio gap got created in the first place.

[Driber]

that worked like a charm. thanks!