converting MOV to AVI - no audio problem

[daniel123]

Hello people, I am lately trying to convert some *.mov files to *.avi. I tried few convert programs like Xilisoft MOV converter, MOVconverter, WinAVI Video converter and that's all I think. Right now I am using WinAVI one... I do all the stuff like enter the location of the file wanted for conversion, leave the "advanced" settings intact. After a while the file is converted but with NO AUDIO. I tried it about zillion times - also with the other programs - but the result is still same.
Do you guys have any idea why there is no audio? I also tried all kinds of options in the WinAVI audio settings panel but there was still no audio.
Cheers,
Daniel

[steveryan]

Try Super.

[daniel123]

On it... btw there is not "%" or "time left" on the status bar. And when the status bar was at the end it went again from the beginning. How will I know then when the encoding will finish when I have no reference to it.

[daniel123]

Hmm... just finished encoding and there's still no sound; maybe I am just missing some codec perhaps? And also there are flashing grey frames through the whole playback of the rendered file.

[Forum Troll]

winavi is a bad encoder... if you have quicktime plus, just use that to export to uncompressed avi..

[prof_unto]

You will be surprised what MPEG Streamclip can do, even with unregistered Quicktime!

[daniel123]

winavi is a bad encoder... if you have quicktime plus, just use that to export to uncompressed avi..

Thanks, will try... and report later.

[daniel123]

You will be surprised what MPEG Streamclip can do, even with unregistered Quicktime!

That is another program for conversion? Or how do I use it?

Exucse my newb questions.

[prof_unto]

I call it a Quicktime's alternative frontend, very easy to use
If you dont have Quicktime installed you can install Quicktime Alternative.

[daniel123]

So, I am now in like 50% of the exporting the *.mov to *.avi via the export option in my QuickTime Pro. The settings are following:

AVI Settings:
Compression: none (set it to this as I understood it meant "uncompressed")
Depth: million of colours
Quality: best

Sound:
Format: uncompressed
Sample rate: 44.1 Khz
Sample size: 16
Channels: 2

...and so far the output file has about 3 gigs (!?). And I am exporting only *.mov clip that is in high definition and is long about 1.5 minutes. Before that I tried some "Cinepak" compression and the output file was large cca 60mb, but the quality was crap. And also before all this when I tried the WinAVI Video Converter the output file had about 50mb and the quality was almost as good as in the HD *.mov file... but as stated before with no audio. What do I have to set it to, to gain THAT good quality and not ending up with a 6gig file?

[daniel123]

I call it a Quicktime's alternative frontend, very easy to use
If you dont have Quicktime installed you can install Quicktime Alternative.

So the program is used in combination with QuickTime Alternative?

Will try it out, thanks.

...
All I wanted was just to convert from one format to another and thought how easy it would be. And now I am stuck on it for second day and don't know how much it will take further lol.

[daniel123]

So I've tried MPEG Streamclip. The output file has this time audio but no video.

Can I perhaps separate the audio layer from video in the *.mov file and then agian merge it (audio) with the final output *.avi (that has no audio in this case) into one file?

Please, any ideas on this?

[prof_unto]

Hmm... that's weird may be you forgot to set the audio codec. What kind of .mov file do you have? Is it using H.264, Apple MPEG-4 or Sorenson video codec?

[Cornucopia]

This could clear things up:

#1 Find out what kind of *.MOV file it is (Video compression=Cinepak, DV, h.264, Animation, MJPEG, MP4, etc; Audio compression=None/LPCM, MP3, ADPCM, ulaw,etc)?? Get QT Pro ($29) it'll tell you what kind ([CTRL+I]=Movie Info).

#2 Realize that you probably ought to create an intermediate, uncompressed AVI (and then create the final kind of AVI you want using familiar AVI tools). This means you'll have HUGE files. You'll need lots of drive space available (uncompressed NTSC-SD=>35GB/hour, HD=>400GB/hour)

#3 Since you'll now have QTPro, use it to convert to the intermediate AVI. Should have no problem with Sync, recognizing codecs, etc.

#4 Use Virtualdub, etc to convert to the final AVI type you want.

Scott

[prof_unto]

OK, I have the same problem, a bug of MPEG Streamclip?

Another solution, try FFmpeg here or here

ffmpeg -i myvideo.mov -vcodec xvid -b 1500kb -acodec mp3 -ab 128kb output.avi

There is a GUI for FFmpeg: WinFF

[daniel123]

Hmm... that's weird may be you forgot to set the audio codec. What kind of .mov file do you have? Is it using H.264, Apple MPEG-4 or Sorenson video codec?

Hm, I don't know anything about those.

Perhaps this will clear it up a bit:

[daniel123]

This could clear things up:

#1 Find out what kind of *.MOV file it is (Video compression=Cinepak, DV, h.264, Animation, MJPEG, MP4, etc; Audio compression=None/LPCM, MP3, ADPCM, ulaw,etc)?? Get QT Pro ($29) it'll tell you what kind ([CTRL+I]=Movie Info).

So I looked to the properities in the QuickTime and according to those the video is in H.264 and audio in AAC... but thats only the the properities for the "test" clip I am trying it on. I want to also convert much bigger *.mov file and that one is using some kind of different compression. So I guess my question on this is, how does the kind of compression matters in the whole encoding process. To rephrase... what is gona the compression type (in this case video:H.264 and audio:AAC) gona affect in the result... filesize? quality? etc.

#2 Realize that you probably ought to create an intermediate, uncompressed AVI (and then create the final kind of AVI you want using familiar AVI tools). This means you'll have HUGE files. You'll need lots of drive space available (uncompressed NTSC-SD=>35GB/hour, HD=>400GB/hour)

If I understand this correctly, it means that there is not a direct encoding link between the input and output file... and that between that I gain one BIG file which is gona be further processed till I gain the final (compressed) output file.
That's about right as I gained, from encoding the 1.5 min *.mov clip a 6Gb huge file.

#3 Since you'll now have QTPro, use it to convert to the intermediate AVI. Should have no problem with Sync, recognizing codecs, etc.

What settings?

#4 Use Virtualdub, etc to convert to the final AVI type you want.

As I am an absolute noob in the video encoding field I would appreciate any specification on how should I exactly do that. Link to some description of this will do I guess.

End of essay lol.

[daniel123]

OK, I have the same problem, a bug of MPEG Streamclip?

Another solution, try FFmpeg here or here

ffmpeg -i myvideo.mov -vcodec xvid -b 1500kb -acodec mp3 -ab 128kb output.avi

There is a GUI for FFmpeg: WinFF

Thanks, will test it, and report back.

[Cornucopia]

So I looked to the properities in the QuickTime and according to those the video is in H.264 and audio in AAC... but thats only the the properities for the "test" clip I am trying it on. I want to also convert much bigger *.mov file and that one is using some kind of different compression. So I guess my question on this is, how does the kind of compression matters in the whole encoding process. To rephrase... what is gona the compression type (in this case video:H.264 and audio:AAC) gona affect in the result... filesize? quality? etc.

This normally won't make a big difference in determining what you want for output (although codec colorspace etc does often make a difference), but actually in this case it might. You see, since h.264 and AAC are valide codecs both for QT (Mac & Win) and Directshow (Win), the best quality could be retained by not doing any re-encoding at all, just demuxing from the MOV container and remuxing into an MP4 or AVI container (although there might be problems there--don't know how well AVI likes h.264...).

However, my guess is you probably are doing all this so that you can have a moderately sized AVI file with DivX/Xvid file to be used on you settop DVD/DivX player...

So, first you'll need to see if your player can support AAC 5.1. If yes, then you can leave the audio alone (just remux at the end of the video processing). If no, then you'll want to use an audio app that can decode AAC 5.1 and save to 6 WAV's, then encode that to something your player can use (like 5.1 AC3, Multichannel MPEG). BeSweet, Affen, and Hypercube transcoder are good for those things. If you don't care about the 5.1, you could use lots of things and just go to 2ch mp3, etc.

Next, you could use QT pro and convert to uncompressed (QT calls it "None" compressed) AVI, but that would be huge (as was talked about). You can losslessly transcode (called "PASSTHROUGH" in the A/V settings) it to MP4 for the next step (or leave alone if it works as is).

Then, convert to Xvid (AVI container) with Super. It accepts MP4 files, possibly MOV files, and is a fairly straightforward GUI for converting.

If I understand this correctly, it means that there is not a direct encoding link between the input and output file... and that between that I gain one BIG file which is gona be further processed till I gain the final (compressed) output file.
That's about right as I gained, from encoding the 1.5 min *.mov clip a 6Gb huge file.

There usually isn't any direct link, NO. And doing it the way I earlier suggested does have a Huge intermediate file. But if you've got the space, IT WORKS. Otherwise, try the other method.

What settings?

(Intermediate)
Same FPS and Resolution as original. "None" compression.

(XVid)
Your choice, but probably 853x480 (1:1 PAR, Widescreen 16:9 DAR) or 640x360 (1:1 PAR, Widescreen 16:9 DAR-fits within 720x480 constraints so no resize), 24(23.976)fps or 29.97fps if NTSCS, 25fps is PAL.
Bitrate dependent upon Quality requirements (but 1000kbps-4000kbps is good range).

As I am an absolute noob in the video encoding field I would appreciate any specification on how should I exactly do that. Link to some description of this will do I guess.

See if those suggestions get you further, then we'll talk again...

Scott

[daniel123]

Wow, thanks for such detailed answer... will surely put it into use.

Well let's get on with it.

You see, since h.264 and AAC are valide codecs both for QT (Mac & Win) and Directshow (Win), the best quality could be retained by not doing any re-encoding at all, just demuxing from the MOV container and remuxing into an MP4 or AVI container (although there might be problems there--don't know how well AVI likes h.264...).

I actually wanted to do that (demux and remux into some output container) as I figured, only in theory tho, that in this way the quality of the high definition mov file could be maintained. I've tried several programs I googled up (maybe I was just googling the wrong phrase), but all of them did on top of that (joining the audio and video) some encoding to the file, so there were some quality losses, mostly.

Back to your post... if I understand it, you're suggesting that instead of doing all the encoding and remuxing (that is suggested further) I should just separate the audio layer from the video and then remux it into some container; MP4 or AVI in this case. So can this be done in QTPro alone? I looked up in the in the Window->Show movie properities... little window pops up and there are three different tracks (video track, audio track, timecode track) and above them there is "extract" button. Can I, hypotheticaly, extract the AAC 5.1, save it, and then save the remaining video track and remux it together into an MP4 container? (uh oh this is getting kinda compilcated lol)... you said in the upper post that "the best quality could be retained by not doing any re-encoding at all" ...but when I want to remux the AAC audio track with the MP4 container doesn't that mean that the video track itself is being re-encoded into the MP4 container?

However, my guess is you probably are doing all this so that you can have a moderately sized AVI file with DivX/Xvid file to be used on you settop DVD/DivX player...

Yep, I will be playing it on both. My pc as my DVD player.

So, first you'll need to see if your player can support AAC 5.1. If yes, then you can leave the audio alone (just remux at the end of the video processing). If no, then you'll want to use an audio app that can decode AAC 5.1 and save to 6 WAV's, then encode that to something your player can use (like 5.1 AC3, Multichannel MPEG). BeSweet, Affen, and Hypercube transcoder are good for those things. If you don't care about the 5.1, you could use lots of things and just go to 2ch mp3, etc.

Dunno if my DVD player supports AAC 5.1. How much of a standart is it? Like lots of DVD players have implemented the support of this or its not that common? Hm will check anyways tho...

Btw what do you mean when you say "use an audio app that can decode AAC 5.1 and save to 6 WAV's"... I don't understand that six wavs part. Why six of them? Does it mean like the AAC 5.1 a format supporting surround system with six sound sources... hence the six wavs?

Next, you could use QT pro and convert to uncompressed (QT calls it "None" compressed) AVI, but that would be huge (as was talked about). You can losslessly transcode (called "PASSTHROUGH" in the A/V settings) it to MP4 for the next step (or leave alone if it works as is).

So whats the difference between uncopressed AVI and losseless MP4 output files? Like one of them maintains the H.264 video quality and the other don't? Or is the difference in the final size of the file? And will my DVD player play the MP4 extension or it is't that broadely established format? ...

There usually isn't any direct link, NO. And doing it the way I earlier suggested does have a Huge intermediate file. But if you've got the space, IT WORKS. Otherwise, try the other method.

This question would probably sound a bit childish but... why there has to be that "intermediate" file? ...does it asures the video quality, or that there won't be any data losses?

---
just one sidenote here:
When I re-encoded the mov file with WinAVI Video converter the quality was almost as good as in the HD mov file and the output file had only about 56mb (AVI container; no audio). The coded it used for video was "ZJMedia MPEG-4 Encoder" and for audio "ZJMedia Mp3 Encoder". So I guess this proves that the mov file can be converted without the "intermediate" file and with highly good quality... tho with no audio in this case.
---

Thanks again for all the suggestions... will give it a try and report back later.

Daniel

[daniel123]

Oh and I tried also this little prog. Tried the MPEG-4 and XViD compression and had a few errors.

Maan, this mov converting is almost a rocket science.

[Cornucopia]

I got busy at work so I had to wait before resonding...

I went ahead and tried what I was suggesting to you.

Just a note before proceeding:

QT supports many codecs in it's container format, 2 important and recent ones being MP4 (MPEG4,Part1-SimpleProfile) and h.264(MPEG4,Part10). It unfortunately doesn't support MPEG4,Part2-AdvancedSimpleProfile...at least not out of the box. This of course is the most common, seen in DivX, Xvid, etc.

QT container format is ALSO the basis for the MP4 container format, so they're almost identical (but not quite). So one thing you can easily do with QT is take certain supported stream types (V-MP4,h.264;A-AAC,mp3) and copy to an MP4 container without re-encoding and losing quality. Sort of like an internal-demux-and-remux. To do this, when exporting to MP4, you have to select "PASSTHROUGH" or "TRANSCODE" in the stream options (once for each kind of stream, A+V).

This isn't the same thing as Uncompressed or Losslessly compressed. It was compressed before (as h.264 in QT container) and is still compressed again (as h.264 in MP4 container), but at least you don't lose a generation of quality, AND it take a whole lot less time to do.

BTW, "losslessly" compressed is like ZIP compression, in that unzipping will give you back the complete original file.

So, back to the original talk...

I DL'd a QT trailer in 720p24 h.264, w/ 5.1AAC audio.

Passthrough export to MP4 (just like I mentioned above).

Took the original and extracted the Audio to it's own QT container, and then Passthrough export to MP4. Can't remember what I did next, but got a raw AAC 5.1 stream.

Opened Video MP4 in SUPER.

Converted to Xvid AVI 720p24 at ~2000kbps. Looks amazing. Now, you could remux. I would use AVIMuxGUI or BST's AVIMux http://www.cornucopiadm.com/goodies/avimux.exe.

...

A regular DVD doesn't support AAC at all. And most DivX/Xvid capable players probably don't either. But you say your PC is your DVD player. So you should be able to play whatever your PC supports. This can be easily expanded to all the above, given some additional codec/player downloads.

...

Think of uncompressed as a stream of multiple RGB BMP files. Each pixel has at least 8bits per color (24bit or 3bytes total). You could cheat your eyes and use YUV colorspace(where each pixel has 1 to 2 bytes total). But not count that as compression, you're still enumerating ALL the pixels.

Lossless compression is like that zip file. It'll be ~1/2 (2:1) the size of the uncompressed, but no less. At least you'll get back what you originally had.

Then you have all your lossy compressions...
MJPEG is ~2 1/2---10:1
DV is 5.5:1
All the others are a lot more compressed (think 20---100:1), with a somewhat concurrent loss in quality, depending on how efficient they are.

If you play your card right, there doesn't have to be an intermediate file, but if you don't know what you're doing real well, things could get difficult. The intermediate file is a failsafe fallback.

...

BTW, not sure how good those codecs you used were...there are others that are more well known and often recommended.

HTH,
Scott

[emily2007]

Hi , I think SPAM is the best one ,it can help you , you can download it at SPAM
You are in breach of the forum rules and are being issued with a formal warning.
/ Moderator Baldrick

[prof_unto]

Oh and I tried also this little prog. Tried the MPEG-4 and XViD compression and had a few errors.

Could you post the errors?

and about MOV to AVI, do you prefer re-encoding or without re-encoding?
AFAIK only a few hardware player that can play H.264 + AAC

[daniel123]

I am sorry for a little delay but I got hold up by some real life bizznis.

QT container format is ALSO the basis for the MP4 container format, so they're almost identical (but not quite). So one thing you can easily do with QT is take certain supported stream types (V-MP4,h.264;A-AAC,mp3) and copy to an MP4 container without re-encoding and losing quality. Sort of like an internal-demux-and-remux. To do this, when exporting to MP4, you have to select "PASSTHROUGH" or "TRANSCODE" in the stream options (once for each kind of stream, A+V).

I tried to do that but when I select MP4 option and pull down the menu with the audio format the "pass through" option is shaded so I can't select it (and so are few others). This same happened with video... tho only when I had selected !MP4 (ISMA)" as file format. When I selected it just to "MP4" the pass through option got selectable. But with audio is it same for both formats... can't select it even when I change it to MP4 format. And btw that "transcode" option is not avilible there at all. Hm, maybe we just have different QT versions... I have QuickTime 7.1.3.

Oh and one question concerning this... what is that "MP4 (ISMA)" format? Is it same as MP4 or does it differ?

I DL'd a QT trailer in 720p24 h.264, w/ 5.1AAC audio.

Passthrough export to MP4 (just like I mentioned above).

Took the original and extracted the Audio to it's own QT container, and then Passthrough export to MP4. Can't remember what I did next, but got a raw AAC 5.1 stream.

Opened Video MP4 in SUPER.

Converted to Xvid AVI 720p24 at ~2000kbps. Looks amazing. Now, you could remux. I would use AVIMuxGUI or BST's AVIMux http://www.cornucopiadm.com/goodies/avimux.exe.

So...

At first I tried the method with the "intermediate" file. I procceded in following steps:
1. Opened the trailer in QT and went to Window->Show movie properities
2. Selected the audio track and pressed the "extract" button. set it to:
- format: linear PCM
- channels: stereo L R
- rate: 48.000 Khz
- quality: best
- sample rate: 16
...and saved it as *.wav
3. Then I exported the video track to the "intermediate" AVI file w/ "none" selected on compression and w/ audio track unchecked (no need as I would just remux it later)
4. After the QT finished it exporting I opened it in Super (cca 6gb file) and adjusted the settings subsequently:

5. Started encoding... and here comes the catchy part. Super encoded only the first twenty seconds. I tried it few times over but it always saved only those first twenty seconds. Really dunno about this.

So I've tried the MP4 transcoding. The procedure was same as above except for that in the 3rd step I exported it into MP4 (only video; audio was un-checked). Was much faster and the output file had about the same size as the mov trailer.

//just a little diversion here:
Can I use at this point, of the whole procedure, other video format than "pass through"? I guess I am just curious in what way it will affect the outcome. Like better quality or other attributes. Here is a screen of what other options are there:

Wouldn't be better selecting the H.264 option as its the same as otput therefore the quality be less altered?
//back to the steps

5. So I at this point I have loaded up the MP4 transcoded file to Super, w/ the same settings as posted in the screenshot above, and started encoding. The final file had about 26mb
6. Downloaded one of those mux progs you suggested, AVIMux GUI, and fired it up. Added the video and audio stream and joined it.
7. Played the file... OMG finaly! Looks awesome... no audio async and the video quality is good. Will toy around with the settings a bit now, when I know how to get the result, to get more familiar with the whole process I guess.

A regular DVD doesn't support AAC at all. And most DivX/Xvid capable players probably don't either. But you say your PC is your DVD player. So you should be able to play whatever your PC supports. This can be easily expanded to all the above, given some additional codec/player downloads.

Hm I wonder why there are then all those sorts of codecs? Wouldn't be better if there would be some global standart for this? All these names make it really confusing for someone who has no clue.

Think of uncompressed as a stream of multiple RGB BMP files. Each pixel has at least 8bits per color (24bit or 3bytes total). You could cheat your eyes and use YUV colorspace(where each pixel has 1 to 2 bytes total). But not count that as compression, you're still enumerating ALL the pixels.

Lossless compression is like that zip file. It'll be ~1/2 (2:1) the size of the uncompressed, but no less. At least you'll get back what you originally had.

Then you have all your lossy compressions...
MJPEG is ~2 1/2---10:1
DV is 5.5:1
All the others are a lot more compressed (think 20---100:1), with a somewhat concurrent loss in quality, depending on how efficient they are.

I am sorry but I have no clue what thats about.

Nevertheless thank you for your reply.

[daniel123]

Could you post the errors?

Here it is:

[for XViD with AC3 audio]


[for MPEG-4]


A bit too technical for me I fear. If I knew what is what it would be something else. I gather there is some codec incompatibility or something.

and about MOV to AVI, do you prefer re-encoding or without re-encoding?
AFAIK only a few hardware player that can play H.264 + AAC

Well the main priority is to get as good video quality, or possibly close, as the original file; without the outcome being a 200gb file of course.

[Cornucopia]

To answer a couple of things:

#1 Transcoding vs. Passthrough
When in QT, if you are setting the Video codec properties (bitrate, etc), the "PASSTHROUGH" option means to pass along a clone copy of the original stream--without re-encoding. And, since we know that the less re-encoding the better, the best quality will be had by passing through. This is synonymous with the Virtualdub option "Direct Stream Copy"
Why didn't you see "transcoding"?
Because that only shows up when you access the video settings while using the DV or MJPEG codecs. In QT --AND ONLY IN QT--they mean the same thing (normal usage of the term in most other apps has transcoding mean to cross-encode from 1 format/bitrate to another--sometimes without having to fully decode first)

#2 h.264 option
Had you selected h.264 option, it would have decoded the h.264 and re-encoded to a new h.264 with 1 additional and unneeded generation of lossiness. Not the best idea.

#3 MP4 ISMA
Don't really know what this stands for, and I haven't seen this in my copy of QTPro. Maybe I do have a different version...

#4 Stopping short!
Don't know why you didn't get the whole uncompressed clip re-encoded correctly. Could have be the fault of QT or of Super or something whacky in the OS...

#5 Standards
There are standards, but they're getting more and more numerous (and probably will continue to, what with computer proliferation). Hopefully computers and consumer electr. devices will all get smart enough to be able to recognize and auto-reconfigure themselves to make the differences transparent to the end user...

#6 Errors
Those errors you're getting mainly have to do with the fact that the app that is "resampling" or converting the sample rate (from 44.1kHz to 48kHz, or vice-versa) can't work with files that have more than 2 channels (stereo) in them. This would include your 5.1ch AAC. That's why.
Better thing to do there (if you need to resample at all) would be to save to WAV/AIF/LPCM doing the SRC from within QT (although it seriously is NOT the best at this.

glad to see things are progressing better.

Scott

[daniel123]

#3 MP4 ISMA
Don't really know what this stands for, and I haven't seen this in my copy of QTPro. Maybe I do have a different version...

Checked for it and it appears it some kind of streaming format... http://www.isma.tv/technology/spec-watch.html

#4 Stopping short!
Don't know why you didn't get the whole uncompressed clip re-encoded correctly. Could have be the fault of QT or of Super or something whacky in the OS...

Yea might be some bug or something. Will try encoding it on onther computer.

glad to see things are progressing better.

Yep, me too.

...

Just few last questions. ...what does "bitrate" mean? I gather its amount of data encoded per second... hence more data, better quality?

And how can I export to the 5.1 system (6 wavs) as you suggested earlier? I tried exporting just the audio in QT but it exports only to "Linear PCM" with two channels, then "AU" and "AIFF" from which AIFF supports as the only one the 5.1 export. Furthermore I am not able to load that AIFF file into BeSweet as its not supported.

[Cornucopia]

Yep, bitrate = rate of the bits = amount of data encoded per second. More data usually = better quality.

Re: audio
You can use the properties/streams panel of QT Pro 7 and select/deselect which audio channels will be "present" in the resulting exported file. (aka exporting 6 times) It's a bit of a pain and slow, but that way you can easily get 6 mono WAV's to input into BeSweet or HypercubeTranscoder.

Scott

[prof_unto]

About the errors may be caused by resolution, 1280x544 too big for ffmpeg?

Well the main priority is to get as good video quality, or possibly close, as the original file; without the outcome being a 200gb file of course.

Here is my way...

1. Searching Track ID with MP4Box:

mp4box -info myvideo.mov

2. Extract video (ex. Video Track ID is 1)

mp4box -raw 1 myvideo.mov

3. Extract audio (ex. Audio Track ID is 2)

mp4box -raw 2 myvideo.mov

4. Mux myvideo_track1.h264 to avi with avc2avi, read here

avc2avi -i myvideo_track1.h264 -o myvideo.avi -f 23.976 -s 2000

23.976 is fps, 2000 means split every 2 GB

5. Mux myvideo_track2.aac to myvideo.avi with AviMuxGUI

Hope it works