file size inflating

[OJNSim]

Hi
I have a 3 hours wmv 2..5 hours movie 2.35G, and I want to split about 1 hour length from the middle of the video.
First I used Simple Video Converter from Win10 Store to make it a mp4 file. This generated a 10G mp4.
Does this make scene?

Second step I tried to use VirtualDub with VirtualdubFFMpegPlugin (mp4 support) to split the required segment.
After short time the new video size was already 35G with 7 min length only.

Any idea why the file is inflating?

tx

[KarMa]

You are re-encoding your videos with a higher bitrate than your soure, and probably some lossless codec with Virtualdub. Virtualdub has differnt modes, and usually opens with "Full Process Mode" which will completely re-encode the video. Directstream copy mode will simply copy the source to the output if it supports the format, like Xvid/Divx. Not sure about wmv support in Virtualdub, doubt it can do much more than decode it.

You could try just spiting the file with AsfBinWin, which will split wmv files quickly. The output will be a .asf, which can simply be renamed to .wmv. It does not re-encode but simply splits the file.

[OJNSim]

I tried DirectStream, but apparently it does not supports avi files.

Is it possible to change the Full Processing Mode setting so it will smaller file?
I check the Frame Rate setting...seems to me they are ok. Isn't it?




My purpose was to split the file. For that sake AsfBinWin does exactly what I was looking for. Tx.

Still interested about the the avi-mp4 processing...

[KarMa]

Thought it was a wmv file.

Hi
I have a 3 hours wmv 2..5 hours movie 2.35G,

[OJNSim]

Yes you are right.
The original was wmv, but I have converted it to mp4 so It will be possible to split it using VirtualDuv, which as far as I know does not support wmv files.

I was not aware of AsfBinWin before.

[Keyser]

Second step I tried to use VirtualDub with VirtualdubFFMpegPlugin (mp4 support) to split the required segment.
After short time the new video size was already 35G with 7 min length only.

You are probably saving UNCOMPRESSED video in VirtualDub. You have to choose a video compression before saving the file, otherwise you'll get HUGE file sizes.

[OJNSim]

I see that...I guess you refer to the Video -> Select Video Compression Dialog
Which one to use?
Are these codecs installed on the machine or come with VD?

[Keyser]

Are these codecs installed on the machine or come with VD?

These codecs are Video for Windows Codecs (VFW) and they must be installed on the machine. They DON'T come with VirtualDub.

You can use, among others, the x264 VFW Codec.

[manono]

And if all you want to do is cut, you don't want to use any of them.

The original was wmv, but I have converted it to mp4 so It will be possible to split it using VirtualDuv

Dumb idea. Just do as KarMa already suggested. Why try and fit a square peg into a round hole?

[Keyser]

And if all you want to do is cut, you don't want to use any of them.

You are absolutely right... but, the OP also said:

Still interested about the the avi-mp4 processing...

[OJNSim]

And if all you want to do is cut, you don't want to use any of them.

The original was wmv, but I have converted it to mp4 so It will be possible to split it using VirtualDuv

Dumb idea. Just do as KarMa already suggested. Why try and fit a square peg into a round hole?

not sure what you mean...
When I tried to cut the mp4 file - the output file was HUGE....So i believe I do need compression codec, when trying to cut mp4 video. Isn't it?
Not that i understand why, how come no compression of 3G becomes 10G...But this is another story

As Karma suggested I used AsfBinWin, to cut the wmv. and actually got what I wanted.
I was not aware of this tool, and I initially converted to mp4 only so I can work with VirtualDub.

[Keyser]

Not that i understand why, how come no compression of 3G becomes 10G...But this is another story .

That's not what happened. When you converted the WMV to MP4 using Simple Video Converter, the resulting file was NOT uncompressed, it just grew because the conversion process was done at a bitrate greater than the original. In the next step, when you saved the AVI with VirtualDub, THEN the resulting file was uncompressed giving those 35GB for just 7 minutes.

I hope I was clear.

[manono]

And if all you want to do is cut, you don't want to use any of them.

The original was wmv, but I have converted it to mp4 so It will be possible to split it using VirtualDuv

Dumb idea. Just do as KarMa already suggested. Why try and fit a square peg into a round hole?

not sure what you mean...
When I tried to cut the mp4 file - the output file was HUGE

Because you weren't just cutting it but also reencoding it using RGB uncompressed.

So i believe I do need compression codec, when trying to cut mp4 video. Isn't it?

No. A compression codec will recompress. You just want to cut it, keeping all the original properties. So, you already compressed it once to MP4 (and whatever video was inside), thus degrading it. Now you're suggesting compressing it yet again (to another MP4 and whatever video?), degrading the quality yet again. Any compression to a lossy codec degrades the quality. Any compression to a lossless codec baloons the size unnecessarily. And reencoding it to uncompressed gives you ridiculously large sizes, as you discovered. And all you want to do is cut it.

[OJNSim]

And if all you want to do is cut, you don't want to use any of them.

The original was wmv, but I have converted it to mp4 so It will be possible to split it using VirtualDuv

Dumb idea. Just do as KarMa already suggested. Why try and fit a square peg into a round hole?

not sure what you mean...
When I tried to cut the mp4 file - the output file was HUGE

Because you weren't just cutting it but also reencoding it using RGB uncompressed.

So i believe I do need compression codec, when trying to cut mp4 video. Isn't it?

No. A compression codec will recompress. You just want to cut it, keeping all the original properties. So, you already compressed it once to MP4 (and whatever video was inside), thus degrading it. Now you're suggesting compressing it yet again (to another MP4 and whatever video?), degrading the quality yet again. Any compression to a lossy codec degrades the quality. Any compression to a lossless codec baloons the size unnecessarily. And reencoding it to uncompressed gives you ridiculously large sizes, as you discovered. And all you want to do is cut it.

I dont understand...
What to do to cut the MP4 file and NOT get a huge file, but rather just the propositional size comparing the the length of the result?

[netmask56]

https://www.videohelp.com/software?toolsearch=mp4+splitter&submit=Search&portable=&s=&o...y=Name&hits=50

[manono]

I dont understand...
What to do to cut the MP4 file and NOT get a huge file, but rather just the propositional size comparing the the length of the result?

What's not to understand? Your original question was about cutting a WMV file. And KarMa answered that one. Now you want to know how to cut an MP4 file (unnecessarily converted from the WMV file)? You don't cut it by reencoding (yet again). You cut using something like the splitter in MP4Tools.

Edit: As netmask56 already suggested.

[OJNSim]

I dont understand...
What to do to cut the MP4 file and NOT get a huge file, but rather just the propositional size comparing the the length of the result?

What's not to understand? Your original question was about cutting a WMV file. And KarMa answered that one. Now you want to know how to cut an MP4 file (unnecessarily converted from the WMV file)? You don't cut it by reencoding (yet again). You cut using something like the splitter in MP4Tools.

Edit: As netmask56 already suggested.

Now I understand....
Use a different tool, as netmask56 suggested after "I did not understand"


Thank you very much