[Avidemux] ***FAQ*** <2008-10-02> [Archive] - Page 2

LoRd_MuldeR

27th August 2008, 18:54

Open your source AVI in Avidemux, set both Audio and Video to "Copy", set Format to "AVI" and that's it.
If you now save the video (File -> Save -> Save Video) it will copy the audio/video stream without re-encoding.
You can correct the sync by checking "Shift" (right below Audio) and setting up the required delay...

28th August 2008, 01:35

LoRd_MuldeR

28th August 2008, 01:39

Thanks for the swift reply, how do I know what the required delay is & whether it is plus or minus?

If the audio plays "too early" you need a positive delay, if the audio plays "too late" you need a negative delay.
Increase/decrease the delay until you are happy with the sync...

28th August 2008, 07:21

If the audio plays "too early" you need a positive delay, if the audio plays "too late" you need a negative delay.
Increase/decrease the delay until you are happy with the sync...

I did realise that, but what tool would I use under Linux to measure the delay in ms so it is as accurate as possible, from your answer it does not seem that avidemux can do this.

LoRd_MuldeR

28th August 2008, 13:04

I did realise that, but what tool would I use under Linux to measure the delay in ms so it is as accurate as possible, from your answer it does not seem that avidemux can do this.

Avidemux can do that! Press the "Play" button, watch the video play, press the "Stop" button and finally adjust the delay.
Repeat these steps until you are happy with the sync...

You could also use MPlayer and adjust the delay in MPlayer while playing (using -/+ keys). Finally apply that delay in Avidemux.

juGGaKNot

30th August 2008, 07:29

What the heck is Avidemux?

Imagine an application which does everything VirtualDub can do, but runs on various platforms, supports a lot of containers, comes with all Codecs you need built-in and doesn't use the nasty VfW interface. That applications is Avidemux! And now the "official" version: Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It's graphical user interface looks pretty similar to VirtualDub and most features known from VirtualDub are available too. Avidemux natively supports a great number of file types, such as AVI, MPEG, VOB, TS, MP4, ASF, OGM, MKV and FLV. At the same time Avidemux natively supports a wide range of Video/Audio formats, including MPEG-1, MPEG-2, MPEG-4 ASP, H.264/AVC, DV, HuffYUV, MP3, AAC, AC-3 and Vorbis. Tasks can be automated using projects, job queue and powerful scripting capabilities. Video-DVD or (S)VCD compliant streams can be created with easy-to-use "Auto" wizards. Multi-threading is supported!

si it is as good as vdub for :

making uncompressed RGB avi from RGB pictures ( 300 FPS )
rendering RGB footage ( riff out of vegas ) to xvid ?

waw, will try today.

LoRd_MuldeR

30th August 2008, 13:29

si it is as good as vdub for :

making uncompressed RGB avi from RGB pictures ( 300 FPS )
rendering RGB footage ( riff out of vegas ) to xvid ?

waw, will try today.

I only see "YV12 (Raw)" output, not RGB. However there are various "true lossless" compression formats available (HuffYUV, FF HuffYUV, FFv1, lossless H.264). At least "FFV1" should support RGB.

Reading image sequences and save the result as video file is supported and I used it with success...

s8ntnick

11th September 2008, 16:56

Can avidemux append avi files into one large avi? I have number of home movies that I would like to combine into larger files on a DVD.

LoRd_MuldeR

11th September 2008, 17:07

Can avidemux append avi files into one large avi? I have number of home movies that I would like to combine into larger files on a DVD.

Yes. Open then first AVI, then append the other AVI files. All AVI files must be the same resolution, of course...

buzzqw

11th September 2008, 19:01

Yes. Open then first AVI, then append the other AVI files. All AVI files must be the same resolution, of course...

but audio can be mp3 VBR too. While virtualdub wouldn't append those kind avi with different audio bitrate, AviDemux CAN!

BHH

LoRd_MuldeR

11th September 2008, 19:19

but audio can be mp3 VBR too. While virtualdub wouldn't append those kind avi with different audio bitrate, AviDemux CAN!

BHH

Just don't forget to build the "VBR Time Map" for such AVI files ;)

deets

20th September 2008, 20:06

this is a brilliant app! I had to load up vdub the other day, never again :)

TEB

3rd December 2008, 05:19

Hi. Nice app but i have some questions:

1. How do i check the x264 version used in the package? Can i dl and use a selfbuild x264 build in anyway? or use the standard .exe from x264.nl ?
2. Does Avidemux support mp4 or mkv as target containers?
3. Does avidemux support a dvd directly without pre-decryption using an external plugin ?
4. Can i use avidemux for the following scanrio:

Source DVD episodes mpeg2 PS/ac3-2channel
Target x264 coded SD streams with ac3-2channel sound (copy) and mkv as a container.. (should i deinterlace it first?)

teb

laserfan

3rd December 2008, 15:09

If your video contains b-frames, you need to use the so-called "special" mode. In that mode you will loose frame accuracy, yes.Sorry if I missed it, but is there a way to tell Avidemux that I always want to use the frame-accurate mode? Answering that B-frame dialog w/No every time I open an x264 (and later "rebuild frames" dialog) is somewhat of a pain.

LoRd_MuldeR

3rd December 2008, 15:28

Sorry if I missed it, but is there a way to tell Avidemux that I always want to use the frame-accurate mode? Answering that B-frame dialog w/No every time I open an x264 (and later "rebuild frames" dialog) is somewhat of a pain.

None that I'm aware of. Also you should go with the "safe" mode to avoid random crash...

laserfan

3rd December 2008, 22:41

None that I'm aware of. Also you should go with the "safe" mode to avoid random crash...Well, maybe I ought to try it, but if "random crashes" are a price I pay for being able to find I-frames accurately in x264 encodings, then I will continue to wade-thru the warnings.

EDIT: OK, well, I tried it the "safe" way and while it seemed to still work i.e. give me precise I-frame positioning it did also terminate unexpectedly while I was advancing to the next I-frame(s). So I guess choosing Safe or not doesn't really matter for my purposes. I still am careful to use only CTRL-T to advance...

LoRd_MuldeR

3rd December 2008, 23:17

Well, maybe I ought to try it, but if "random crashes" are a price I pay for being able to find I-frames accurately in x264 encodings, then I will continue to wade-thru the warnings.

EDIT: OK, well, I tried it the "safe" way and while it seemed to still work i.e. give me precise I-frame positioning it did also terminate unexpectedly while I was advancing to the next I-frame(s). So I guess choosing Safe or not doesn't really matter for my purposes. I still am careful to use only CTRL-T to advance...

I think Avidemux is not able to handle H.264 streams in a frame-accurate way yet, no matter what "mode" you choose.

That's one of the things that hopefully will be addressed in Avidemux 2.5 one day ...

laserfan

4th December 2008, 05:39

I think Avidemux is not able to handle H.264 streams in a frame-accurate way yet, no matter what "mode" you choose.
Well, I only use it so far to ID I-frames in x264 vids, to choose chapter locations, and it seems to do that just fine.

Brazil2

12th February 2009, 02:33

LoRd_MuldeR

12th February 2009, 02:40

Two questions about AviDemux:

I've noticed that AviDemux automatically sets the H264 Profile and Level. For instance for SD resolutions (backup of a DVD, native resolution and AR being kept) I always get High@3.0. But when I encode to a higher resolution I get Level 4.2 or even Level 5.2.

So my question is: is there a way to force the use of Level 4.1 ?
I haven't found anything about that in the Wiki. And I believe I'm using Level 4.1 compatible encoding options that I've found in this thread (http://www.avsforum.com/avs-vb/showthread.php?p=12728994#post12728994) but I always got L4.2 and not L4.1.

Not Avidemux, but the x264 encoder it uses, will detect the H.264 Level and Profile.

You can't set the Level/Profile directly. The Profile depends on the settings you choose. The Level also depends on resolution, framerate and bitrate.

Have a look here:
* http://en.wikipedia.org/wiki/H.264#Profiles
* http://en.wikipedia.org/wiki/H.264#Levels

I'm also trying to incorporate SRT subtitles to the final image by using the built-in Subtitler filter. But it doesn't work. I've tried many different settings (color, position, etc) without success.

What am I doing wrong ?

Are you sure that you are looking at the filtered "Output" video and not at the unfiltered "Input" video?

Initially Avidemux shows the "Input" video in its main window...

Brazil2

12th February 2009, 03:03

The Profile depends on the settings you choose. The Level also depends on resolution, framerate and bitrate.

Have a look here:
* http://en.wikipedia.org/wiki/H.264#Profiles
* http://en.wikipedia.org/wiki/H.264#Levels
Thanks for the answer :)
Yes I've read all of that and I'm within the specs. Hence my question :)

Attached file is the custom AviDemux profile I'm using as a basis. Most of the time I'm using bitrates from 2500 up to 15000 Kb/s, resolutions of 1920*1080 or 1280*720 and 25 FPS. Sometimes I add the p4x4 option depending on the result I want to get.

Are you sure that you are looking at the filtered "Output" video and not at the unfiltered "Input" video?

Initially Avidemux shows the "Input" video in its main window...
I'm looking at the final result, the video itself.
And there is no subtitle integrated to the image.
The target is XviD+MP3 in an AVI container. I haven't tried any other target format yet.

klondike

27th February 2009, 21:19

Lord Mulder please help me because no one on the forums has been able to provide an answer to a problem i have.The situation is that i am trying to rip vobsubs off a multi-language DVD.I use the VOB tool in avidemux but the idx file has inaccurate timestamps.When i use another Windows program called VobSub or the following commands in Linux i get correctly indexed .idx files:

tccat -i <path to ripped vobs> -T <tile number> -L | tcextract -x ps1 -t vob -a 0x21 > subs-en
subtitle2vobsub -o vobsubs-en -i <Path to IFO file> < subs-en

Avidemux's created .idx file starts like this:

timestamp: 00:15:50:409, filepos: 000000000
timestamp: 00:15:59:618, filepos: 000001800
timestamp: 00:16:16:468, filepos: 000002800
timestamp: 00:16:19:505, filepos: 000003800

and ends like this:

timestamp: 01:50:23:411, filepos: 00138f3b
timestamp: 01:50:27:249, filepos: 00139c72
timestamp: 01:50:51:006, filepos: 0013a773
timestamp: 01:51:08:356, filepos: 0013b374

Whereas the correctly indexed idx files created with the alternative programs mentioned above all have the following timestamps starting like this:

timestamp: 00:15:50:409, filepos: 000000000
timestamp: 00:15:59:618, filepos: 000001800
timestamp: 00:16:16:468, filepos: 000002800
timestamp: 00:16:19:505, filepos: 000003800

and ends like this:

timestamp: 01:50:46:334, filepos: 0001b4000
timestamp: 01:50:50:171, filepos: 0001b5000
timestamp: 01:51:13:929, filepos: 0001b6000
timestamp: 01:51:31:279, filepos: 0001b7000

It appears that the vobsub tool is indexing the vob files incorrectly and i don't know how to fix it.I have tried all the avidemux versions from 2.4 to 2.44 and there is no difference.This happens with both the Windows and Linux versions of Avidemux.

halsboss

18th April 2009, 04:13

Hi there, it looks like a terrific program ! Will have to give it a whirl.

I'm a little confused on positioning; I noticed you recommend "avi-mux GUI" http://alexander-noe.com/video/amg/ to someone ( http://forum.doom9.org/showthread.php?p=1172081#post1172081 ) to demux an avi into elementary streams, but had thought avidemux could do that ...

Can you please clarify, as the program names and functionality confuse me ?

Also, in demuxing xvid/mp3 .avi does it (either one) "take care of" .avis which may or may not be packed bitstream, when creating elementary streams ?

Inspector.Gadget

18th April 2009, 04:22

LoRd_MulderR: I know that Avidemux has color correction options through ColorYUV. If I were to open to a VOB directly in Avidemux, would the proper color correction be applied anyway? For instance, I know that Avisynth's ColorMatrix() corrects MPEG-2 color coefficients and can use hints from DGIndex to auto-correct color; does Avidemux, as a more integrated package that can encode directly to ASP/AVC, do this behind the scenes?

LoRd_MuldeR

18th April 2009, 13:30

@halsboss:
AVI-Mux GUI and Avidemux are not related at all! AVI-Mux GUI is a pretty simple tool for (de)muxing AVI and MKV files. Avidemux is a fully-fledged video editor and encoding application. You can think of it as the cross-platform equivalent of VirtualDub. However despite its name and in contrast to VirtualDub, Avidemux isn't restricted to the AVI container at all! Also Avidemux is able to unpack an AVI file with "packed bitstream" (as created by DivX). It's called "AVI, unpack VOP" and it's available from the "Format" dropdown menu. Avidemux will even suggest to unpack such files automatically...

@Inspector.Gadget:
Avidemux provides at least two filters for color correction: MPlayer EQ2 and Avisynth ColorYUV. These filters need to be enabled and configured manually, in case a color correction is necessary. However in most cases you won't need to do that. Usually you can simply keep the original color levels of the source MPEG-2 file(s). Better get your levels right at playback time!

halsboss

20th April 2009, 10:33

Thanks. Did you notice the avidemux query over at http://forum.doom9.org/showthread.php?p=1275570#post1275570 (should I re-post here ? I don't know how to move it).

LoRd_MuldeR

20th April 2009, 13:27

Thanks. Did you notice the avidemux query over at http://forum.doom9.org/showthread.php?p=1275570#post1275570 (should I re-post here ? I don't know how to move it).

Maybe the Avidemux Forum (http://avidemux.org/admForum/) is the right place ask this highly specific question...

halsboss

20th April 2009, 13:40

OK. I didn't think of that, usually doom9 has help on all sorts of things. Thanks,

Nexin

3rd May 2009, 02:54

Run Avidemux and load a video, and the gui reduces and moves elsewhere on the screen. Can the gui not be made to retain its position when loading a video ?

Can the gui be made to remember its last postion at exit for next use ?

Or is this something to do with, i like my taskbar at the top of the screen. I doubt it but many apps like to sneak under it sometimes. But that just bad design by other software developers.

I do like AviDemux sometimes though it just disapears with some files. I was trying to convert a .ogm packed file last night. It loaded i selected avi output copy video and audio, then tried xvid and mpg2 audio and then some other options, both times the gui just dissapeared. I could have look at the log but i will try and demux it first and process each stream individualy, maybe its because it has chapters, that i don't need to keep.

For all the other softwares i have used in the past. Why did they not implement mp2 audio. This is one strong feature i i like avidemux for. Because mp2 audio sound so much better than any mp3 varieties, with not much more size added not that, that matters.

Keep up the coding you do, there are users out there that while do not write to you are happy to use the software. Ok then of i go for session with the new build v2.5.0 :thanks:

LoRd_MuldeR

3rd May 2009, 12:36

Run Avidemux and load a video, and the gui reduces and moves elsewhere on the screen. Can the gui not be made to retain its position when loading a video ?

Can the gui be made to remember its last postion at exit for next use ?

Or is this something to do with, i like my taskbar at the top of the screen. I doubt it but many apps like to sneak under it sometimes. But that just bad design by other software developers.

Avidemux will adjust the window size according to the video you open. But I never see the window "jump" around...

I do like AviDemux sometimes though it just disapears with some files. I was trying to convert a .ogm packed file last night. It loaded i selected avi output copy video and audio, then tried xvid and mpg2 audio and then some other options, both times the gui just dissapeared. I could have look at the log but i will try and demux it first and process each stream individualy, maybe its because it has chapters, that i don't need to keep.

If you encounter a crash, looking at the log is your only way to get more information (except for using a debugger).

For all the other softwares i have used in the past. Why did they not implement mp2 audio. This is one strong feature i i like avidemux for. Because mp2 audio sound so much better than any mp3 varieties, with not much more size added not that, that matters.

Huh? What applications are you talking about?

Most applications simply use the ACM codecs installed on your computer. So whether MP2 is available (or not) solely depends on the installed ACM codecs.

Avidemux is an exception here! It doesn't use VFW/ACM Codecs...

Nexin

3rd May 2009, 20:55

Mulder the Jump I refer to (probably jump is not the correct word). When gui is at full screen, and then load a new video. The gui shrinks and moves elsewhere on the screen. I thought as you say it's because of the video dimensions and gui resizing. If it cannot be done, thats ok, just thought i'd ask as its unusual to see this. I see where other softwares the gui windows remains staic, when a new video is loaded. And the video dimensions are loaded to correct aspect for the video. If not possible no problem is only a cosmetic.

Have got around the OGM file i used Yamb to demultiplex the video and audio streams (where is the demultiplexer in avidemux?). So then i could process each stream individualy. Have now a transcoded xvid-avi with an mp2 audio stream video file.

For other softwares i meant the piffy ones the say they do it all (commercial softwares). Yet they do very little and many only know of the correct iso specifications for ntsc. With many of these such softwares they only allow for with xvid-avi transcoding with mp3 or wav no other options. It is why i am now using avidemux, because it has all the options, and does what i need everytime. :)

LoRd_MuldeR

3rd May 2009, 21:00

Nexin

3rd May 2009, 21:19

Ok thanks O' LoRd_MuldeR i now have that bookmarked will do it later sometime soon.

akiza

20th July 2009, 07:56

Avidemux is a free video editor designed for simple cutting...

If I just wanna cutting a "packed" avi...

A. Open packed avi,unpack it,cut/edit on the fly,then save.

B. Open packed avi,unpack it,SAVE it. Open the saved avi(unpack),cut/edit it,save it

which one is the right/better way?

And Avidemux seems can't direct conver "packed" avi to "unpack" mp4.

When I opened a "packed" avi and unpack it and save a new mp4 file,I found there is "packed bitstream" data in the mp4 file...

Does it mean If I wanna conver a packed avi to a unpack bitstream mp4 I must open->unpack->save->open unpack one->save as mp4 ?

Is there any shortcut?

LoRd_MuldeR

20th July 2009, 12:48

If I just wanna cutting a "packed" avi...

A. Open packed avi,unpack it,cut/edit on the fly,then save.

B. Open packed avi,unpack it,SAVE it. Open the saved avi(unpack),cut/edit it,save it

B

Does it mean If I wanna conver a packed avi to a unpack bitstream mp4 I must open->unpack->save->open unpack one->save as mp4 ?

"Packed bitsream" is a hack that DivX invented to circumvent certian limitations in VFW/AVI.

I don't think this exists for MP4 ...

akiza

21st July 2009, 03:22

"Packed bitsream" is a hack that DivX invented to circumvent certian limitations in VFW/AVI.

I don't think this exists for MP4 ...

for example...

1. I open a "Packed bitsream avi" via avidemux.
2. unpack bitstream
3. save to a mp4 file (via copy mode)

when I open the mp4 file via avidemux,the avidemux's FILE-INFORMATION show [Packed bitsream : Yes]

Is that a bug or that mp4 file only contain bitstream directly copy from original avi file (unpack won't work in direct copy to mp4 file-type)?

LoRd_MuldeR

21st July 2009, 12:08

If you set the "Format" to "MP4", then Avidemux won't unpack the "packed bistream" for obvious reasons. You must select "AVI, unpack VOP" to do that ;)

And yes, the way it is currently implemented, you can't unpack and re-mux the AVI to MP4 "on the fly". First unpack, then remux from the "unpacked" file!

akiza

29th July 2009, 08:35

Maybe those SVN version could provide MD5 checksum at mirror site?

:thanks:

LoRd_MuldeR

29th July 2009, 13:58

Maybe those SVN version could provide MD5 checksum at mirror site?

:thanks:

Why? The Avidemux installers are NSIS-based and NSIS installers have their own integrity check. If the installer was corrupted, it would display an error message!

I think even the ZIP files have some kind of checksum, which should detect corrupted archives on extract...

Anyway here are your MD5 values:
Avidemux.2009-07-25.Win32.exe = aa42f0da0ffcb91b8c728e6cb67594ff
Avidemux.2009-06-23.Win32.Final.exe = 3df40bb0abb90afed6c5f5572dd614a9
Avidemux.2009-02-07.Win32.Final.exe = e09ad0122eb3c532803df621cc501eda

akiza

30th July 2009, 03:10

Why? The Avidemux installers are NSIS-based and NSIS installers have their own integrity check. If the installer was corrupted, it would display an error message!

Anyway here are your MD5 values:
Avidemux.2009-07-25.Win32.exe = aa42f0da0ffcb91b8c728e6cb67594ff
Avidemux.2009-06-23.Win32.Final.exe = 3df40bb0abb90afed6c5f5572dd614a9
Avidemux.2009-02-07.Win32.Final.exe = e09ad0122eb3c532803df621cc501eda

thanks,I just think about "more confirm more safety" :)

~~~

I downloaded the SVN 5152 and find some strange in the x264 config window

***
commit af2a4ecd7bcefc97c8aa83913c9a2980206f9cd0 r1177
Author: Jason Garrett-Glaser <darkshikari@gmail.com>
Date: Wed Jul 1 21:14:57 2009 -0700
Our defaults have also changed: new defaults are --subme 7 --bframes 3 --8x8dct --no-psnr --no-ssim --threads auto --ref 3 --mixed-refs --trellis 1 --weightb --crf 23 --progress.

***

The new "default" setting has changed since r1177.
The crf value should be 23 but SVN 5152's x264 crf default value is "26"... :confused:

LoRd_MuldeR

30th July 2009, 03:20

The defaults for the x264 CLI (command-line) encoder have changed in r1177 indeed. But that doesn't effect Avidemux at all. It has its own default values ;)

But I agree that the x264 dialog in Avidemux needs some updates:
* SubME=10 ("QPRD") is missing and only available in Avidemux through a patched libx264
* Psy-RDO and Psy-Trellis cannot be adjusted, because options are missing
* AQ mode 2 (aka "AutoVAQ") is missing too and again only available via patched libx264

So adjusting Avidemux' x264 dialog for the new x264 defaults is definitely not the most important thing to do.
You can always choose your preferred settings. Don't worry too much about the defaults...

akiza

31st July 2009, 13:11

But I agree that the x264 dialog in Avidemux needs some updates:
* SubME=10 ("QPRD") is missing and only available in Avidemux through a patched libx264
* Psy-RDO and Psy-Trellis cannot be adjusted, because options are missing
* AQ mode 2 (aka "AutoVAQ") is missing too and again only available via patched libx264
...

And the "--nr"(?) filter ?

It's usefull when encoding some noisy video. :)

LoRd_MuldeR

31st July 2009, 13:38

And the "--nr"(?) filter ?

It's usefull when encoding some noisy video. :)

It's already there. Look again, "Noise Reduction" is located on the "Analysis" tab in Avidemux' x264 dialog ;)

Anyway, I don't recommend using that option. If you need denoising, then better use a "real" denoise filter like "hqdn3d" or "Fluxsmooth".

Last but not least I prefer keeping the noise instead of smoothing it out. x264 has very good noise retention now...

akiza

3rd August 2009, 04:50

It's already there. Look again, "Noise Reduction" is located on the "Analysis" tab in Avidemux' x264 dialog ;)

Anyway, I don't recommend using that option. If you need denoising, then better use a "real" denoise filter like "hqdn3d" or "Fluxsmooth".

Last but not least I prefer keeping the noise instead of smoothing it out. x264 has very good noise retention now...

thanks ^^

The reason I perfer using nr filter is, using value 100~150, the filter can reduce file size about 10%~20% and keeping a lot detail.

Using HQDN3D (or other smooth filter) It still can reduce file size about 15%~25% but lossing too muvh detail @@

Is there any doc or guide about the "nr filter" ?

:)

LoRd_MuldeR

3rd August 2009, 04:58

Other denoise filters have options to tweak the filter too. So if you think they remove too much detail, you should reduce the strength ;)

What docs do you need about the x264 "nr" filter? There is only one parameter which controls the strength of the filter.

Even the x264 developers say that the built-in denoise filter is very simple/fast and that it never was developed to be a "high quality" denoiser.

http://forum.doom9.org/showpost.php?p=1304816&postcount=2

And why do you want to denoise at all?

Nowadays x264 is pretty good in retaining noise. And you never can remove the noise without destroying at least some detail at the same time.

http://forum.doom9.org/showthread.php?t=147394

LoRd_MuldeR

6th August 2009, 20:10

hai sir how to convert dvd to avi 700mb with Avidemux2,need nice tutorials with screenshot , as i already see this http://avidemux.org/admWiki/index.php?title=DVD_to_AVI
but i could not understand sir

1. Rip your original Video-DVD (the "VIDEO_TS" structure) to your HDD. Use DVD Fab, DVD Decrypter or a similar tool.

2. Open the first VOB file that belongs to the "main" movie in Avidemux and (if Avidemux asks) agree to append the other parts (VOB files).

3. Set "Video" to "MPEG-4 ASP (Xvid)", set "Audio" to "MP3 (LAME)" and set "Format" to "AVI".

4. Click the "Configure" button right below "Video", set "Encoding Mode" to "Video Size (Two Pass)" and enter the desired target filesize (note that this is for the Video part only, audio is not included here !!!).

5. Also set "Pixel Aspect Ratio" to "As Input", then press "OK" to close the Xvid configuration dialog.

6. Goto "File" -> "Save" -> "Save Video", save to "Foobar.avi" and wait...

cord-factor

4th February 2012, 16:09

Why do my MPEG-2 files get out of sync when I cut/edit them in Avidemux?

Captured MPEG files are generally from DVB S/T (in MPEG TS format) or from IVTV based cards or any other card with hardware MPEG-2 encoding (in MPEG PS format). These captures often contain transmission errors which end up as missing or broken frames! A video player (MPC, MPlayer, xine, VLC, etc.) will constantly re-sync the streams using the timing information embedded in the stream. Avidemux will not! Apart from the constant shift, which is easily recoverable using the timeshift filter, it will result in a growing synchronisation issue when encoding or transcoding. Even saving without re-encoding will be async! MythTV recordings are a prime example of this problem: The audio will be offset by approximately -330 ms at the start of the recording and the drift throughout the duration of the recording. Please note that not all MythTV recordings have this problem, just some depending on the software and hardware configuration. The only 100% reliable way to fix your MPEG-2 files is to use ProjectX. You can get ProjectX from http://project-x.sourceforge.net/, a tutorial can be found at http://www.avidemux.org/admWiki/index.php?title=Project_X.
How about transcode (http://www.transcoding.org/cgi-bin/transcode), I mean
tcextract -i movie.vob -t vob -x mpeg2 > movie.m2v
tcextract -i movie.vob -a 0 -x ac3 -t vob > movie.ac3
will it do the same as projectx?

butterw2

28th January 2021, 13:44

Avidemux is a free multi-platform video editor designed for simple cutting, filtering and encoding tasks.

Links:
- Code: https://github.com/mean00/avidemux2/commits/master
- Dev. versions (recommended for x64): http://www.avidemux.org/nightly/
- Releases: http://avidemux.sourceforge.net/download.html
- user Forum: https://avidemux.org/smif/index.php

Good cutter (supporting many different input formats, ex: h264 mp4) with a nice simple QT5 interface.
Supports .py project scripting and filter plugins.

blob2500

17th April 2023, 14:06

How to activate qcomp (Quantiser Curve Compression) in Avidemux? Its section is always disabled in the latest versions, in any x264 gui configuration.
It only works with the default values: qcomp 60%; or 80% in some preset/tune.

https://i.postimg.cc/fWtpV0P4/qcomp-avidemux.jpg

I tried Avidemux 2.8.x vsWin64 and Win64 for windows (10) x64.