Silent AC3 files

I just installed DVDSP from the FCP studio (universal binary) on my new quad G5. I used Compressor2 to encode video and audio from FCP 4.5. The aiff files sound fine, but the AC3 files are silent. When I take the aiff files to my old G4 and encode them using a.pack, the resulting AC3 files sound fine.
Why isn't Compressor2 giving me AC3 files I can hear? They aren't DTS, so I shouldn't need a decoder. I've even tried building the DVD with the silent files but they are still silent when played in Apple's DVD Player.
4X 2.5GHz PowerPC G5 Mac OS X (10.4.6)

have you tried burning the pproject and playing back on a set top player?
that is the ultimate test, however, i do find it weird that your *.ac3 is silent.
please burn a disc, and play from a desktop and let us know.
Mikey

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Compressor 3 produces silent ac3 files.

I'm exporting files from FCP 5.1.4 to Compressor 3.0.3, using their preset for DVD Best Quality 120 minutes. Compressor run without any problems, produces an m2v file and an ac3 file. The problem is the ac3 file, although 171MB and the correct length, is completely silent. I've played it back using QT, VLC, imported it into DVDSP and even burned it to a disc.
Help!

Here's where we are now... I've uninstalled Compressor 3, installed Compressor 2. No luck. I installed a.Pack and that didn't seem to work either. Then I re-installed Compressor 3 as well as ffmpegX. (That will convert aiff files to ac3.) Since re-installing Compressor 3, it appears I can successfully convert aiff files to ac3 now using both ffmpegX and Compressor 3. They don't play back in anything other than DSP, but since that's where I need them, I'm not too concerned. So the problem is half solved but it still involves an extra step of exporting and aiff file from FCS and then converting it to an ac3 file in Compressor or ffmpegX. I still end up with a silent file however when I export directly from FCP to Compressor. (Even when I try to play it in DSP.)
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Thanks to all of you who've offered help!

DVD SP 4 and AC3 Files

I've been fighting the problem of exporting directly from FC Express to Compressor 2 and ending up with silent AC3 files. In searching the previous discussions, people advise using A.pack to convert a .aiff file. As far as I can tell A.pack is not shipped with DVD4. Right or wrong?
How do you get to Apple Inc to tell them about this problem?
Will they bother fixing it?
Any other suggestions?

Calvin,
See my post here: Guy Rhodes, "AC3 files made in compressor don't play in DVDSP" #5, 02:07am Oct 11, 2005 CDT
I found a workaround using .AIFF's that works using just Compressor, no A.pack.

.ac3 files

Hello
I have.ac3 audio files that work in DVD Studio Pro. Having lost the originals, I need to convert them back to .aif. Used a third party utility for Quicktime called Perian without luck - converted file was silent. Anybody have a sugestion for successful conversion.
Thanks in advance

Obviously having the original files is preferable as you are using a compressed source by using the AC3 file. But you know that
we have used mAC3dec in the past to do the self same thing. Just google it. Can be a touch flaky but usually works. I seem to remember there being another one on the Mac but can't recall it's name.
Think there are quite a few utilities on Windows that can do the same - BeSweet is one I believe.
Hope that helps.

Unable to Hear AC3 Files

I made a video in FCP 4.5, and exported the video/audio with Compressor. Output to .M2V and .AC3 files. The video looks great, but when I loaded the files into DVDSP4, the files are silent. They take up space on my drive, and the longer the file, the larger the file.
I can't can't hear them. (Yes, I am hearing other things out of my computer, just in case someone wants to suggest my speakers are turned off.)
Thx,
Mike

Man, a lot of people have this same problem... And A.Pack crashes on my dual G5, so what else is there to try...?

How to open .AC3 files in Audition CS5.5

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However, after installing the QuickTime Player, Audition 5.5 seemed to open the .AC3 file I've selected but the whole duration of the AC3 file is blank and has nothing in the waveform. I could not hear anything during the playback.
The fact is that when the AC3 file is playing through the Windows Media Player 12 with AC3Filter, the file can be heard and has no error.
Does anyone know the solution to this issue?

The D7000 was first supported in Camera Raw 6.3.
http://helpx.adobe.com/creative-suite/kb/camera-raw-plug-supported-cameras.html
CS5 shipped with Camera Raw 6.0 and is compatible through to Camera Raw 6.7
http://helpx.adobe.com/x-productkb/global/camera-raw-compatible-applications.html
Download and install Camera Raw 6.7 and you'll have D7000 Raw support
Win: http://www.adobe.com/support/downloads/detail.jsp?ftpID=5371
Mac: http://www.adobe.com/support/downloads/detail.jsp?ftpID=5372

Is there a way to silently upload files?

Ok, so I've taken the plunge. I've started working on an AIR
app using Flash CS3. I'm putting together a little app that will
keep my online store updated with all the product updates from our
wholesaler. This includes parsing a csv file, downloading product
images from the wholesaler, updating the database, and then
uploading the images to our server.
The problem is that AIR does not seem to have the
functionality to silently upload files! Sure, I can use the
file.reference object to fire off the browse method, which then
opens the OS file browser window BUT I would really like the whole
thing to be hands off. In the past, I've written these types of
apps using Visual Studio but I haven't touched VS in two years.
Has anyone run across a way to silently upload or ftp files
in AIR?

Hey Oliver,
Thanks for your answer--the fact that it CAN be done has
gotten me a lot further on finding a solution. Here's what I have
so far. As it runs, I can see the progress and completion of the
upload but I'm still not getting it saved. I'm uploading it to a
ColdFusion processing page.
AS3 Code:
import flash.filesystem.*;
import flash.net.URLRequest;
//Silent File Upload (no browse window)
function imageUpload(imageName,uploadPage):void
trace('Starting Upload of ' + imageName + '\n');
var myFile:File =
File.applicationDirectory.resolvePath(imageName);
var request:URLRequest = new URLRequest(uploadPage);
request.method = URLRequestMethod.POST;
myFile.addEventListener(ProgressEvent.PROGRESS,progressHandler);
myFile.addEventListener(Event.COMPLETE,completeHandler);
myFile.upload(request,"theFile");
function progressHandler(event:ProgressEvent):void {
var file:FileReference = FileReference(event.target);
var pLoaded =
Math.ceil(event.bytesLoaded/event.bytesTotal*100);
trace(pLoaded + '% uploaded');
function completeHandler(event:Event):void
trace ('Upload complete.');
var uploadPage = "
http://www.aaronbday.com/upload_file.cfm";
imageUpload("angelic_cat.jpg",uploadPage);
Here's the CFM page:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8" />
<title>Upload File</title>
</head>
<body>
<cfif isDefined("form.theFile")>

<cffile
action="upload"
destination="#ExpandPath("test/")#"
filefield="theFile"
nameconflict="overwrite"
accept="image/jpg,image/jpeg,image/gif,image/pjpeg"
>
<cfoutput><img src="test/#cffile.serverFile#"
/></cfoutput>
<cfelse>
<form method="post" action="upload_file.cfm"
enctype="multipart/form-data">
<input type="file" name="theFile" />
<input type="submit" name="Submit" />
</form>
</cfif>
</body>
</html>
Any ideas? Thanks!

How do I create a DVD from existing M2V and AC3 files?

I have previously used Compressor 4 to render a M2V file and an AC3 file from which I burned a DVD 'job'. Now, a week later, I wish to go back and burn another DVD from these files, (without rendering them again). How do I use these EXISTING files to create another DVD (using Compressor 4)?
Thanks,
Geoff

If you anticipate that you may need multiple disks, the way to do it is to select Hard Drive as your output device/ That makes a disk image, from which you can burn multiple copies.
WIth the separate files already created, you could bring them into an authoring program like Toast. But if you want to re-use them in Compressor, I think your only option is to multiplex them in something like MPEG STreamclip and bring the new file back into Compressor.
Probably easier to redo the Compressor job with the original source.
Russ

OK, I have a .mov and .ac3 file output by Compressor. How do I make a DVD from these?

I'd like to use Toast 8 but I don't know where to drag the files...Toast help is no help at all...

First off, you should have compressor turn your .mov into an mpeg-2 file with an .ac3 file. Once you've done this, you simply select the Video button in Toast (I'm on Toast 10, but I think 8 was the same). Next select your Menu style from Toast and type in your DVD name. Finally drag your mpeg-2 file over into the Toast window. It will then ask you "do you have audio for this file?". Drag the .ac3 file over and have it burn the DVD. If you've done everything correctly it shouldn't re-encode your video, but simply add the menu to your already encoded files.
As an alternative, you could have Toast do the encoding as well. If you choose this route, you simply drag your original .mov video file over to the Video window. At this point there are some choices you need to make about how Toast will do the encoding. This way takes longer as Toast has to encode both your video and the menu you created.

Encore CS5 using an existing AC3 File -- will it output 5.1 surround sound?

I have an HD blu ray quality video file (.m2v) that I want to run with an existing 5.1 AC3 file provided by my mixer. If I line these two up on the timeline in Encore CS5, will it output a surroundsound blu-ray?

I have an HD blu ray quality video file (.m2v) that I want to run with an existing 5.1 AC3 file provided by my mixer. If I line these two up on the timeline in Encore CS5, will it output a surroundsound blu-ray?

M2v & ac3 files to big for DVD Studio Pro

Hi everyone,
Need help with large files.
1. Have full length 90 minute soccer game of my son filmed with HDV Camera.
2. Imported into final cut pro 6.
3. Edited and exported high res mov file which is came out at 20.45GB.
4. Open in compressor and used DVD settings Best quality 90 minutes
Result: The m2v and ac3 files total 5.1GB and to large to burn a DVD.
How can I make a DVD of this game?
Thanks
Message was edited by: Bryan Rawiri

Use the 120 minute preset

Can't import AC3 file...

Hi,
I have some 5.1 AC3 files I encoded in another (older) application and am trying to import them into DVDSP. The files look OK and are recognized as DVDSP files with an AC3 extention. However, every time I try to import them as assets I get the error message "Incompatible Format." Anyone know what's going on here? I don't see how its incompatible.
Thanks,
Brian

If your .ac3 file is indeed 44.1 kHz, that's at least part of your problem.
According to page 25 of the DVDSP manual, you must use either 48 or 96 kHz audio. It goes on to say that DVDSP's encoder will convert other audio sample rates, but I don't think it can do that for .ac3 stuff.
(But I refer to the manual because I don't have direct experience with this...)

Compressor on Intel Macs create byte reversed AC3 files

A co-vendor's MUXing application is unable to recognize my .ac3 file created by Compressor. I have a file inspection application from Manzanita Systems that also fails to recognize the .ac3 file.
I found this on the web:
- - - - - - - - - - - QUOTE - - - - - - - - - - -
another user had a problem with an AC3 recently as well. In that case the file was created with a wrong (well, it's not actually wrong but it's unusual for Intel PCs) byte order which makes it impossible for ProEx to handle the file. DVD Studio Pro sees it just fine.
If you've got a hex viewer you could find out by yourself. The first two bytes of an AC3 must be 0B 77. If they are shown the other way around then the byte order has to be changed.
- - - - - - - - - - - QUOTE - - - - - - - - - - -
I looked at my .ac3 file with a hex editor and it starts with 77 0B.
Then I looked at an .ac3 file that I created with Compressor on a G5 in back in October '06. It began with 0B 77. It was also recognized by Manzanita's MPEG-ID application.
I can't find anything on Apple's website regarding this issue. No Knowledge Base article; no update; nothing.
Whiskey Tango Foxtrot?
Anyone using the latest version of Compressor on an Intel based Mac to create AC3 files having problems sending them out to people who are NOT using DVD Studio Pro to handle the files further?
THIS NEEDS TO BE FIXED NOW.
AND...
see this thread:
http://discussions.apple.com/thread.jspa?messageID=3394982&#3394982
MacBook Pro Mac OS X (10.4) + stuff
PBG4 Mac OS X (10.4)

I'm afraid you're right.
I just created a brand new DVDSP test project. The three new files created with Compressor work. The same files that didn't work in the project where they were PPC created AC3 files.
I was lost in many possibilities, since I had also notice that if I go in DVD SP 4 Preferences, in "Simulator" (I'm french and I don't know its real name in english...) then in "output of player" (same for my french translation) in "Audio" and that I select "numerical output - sp/dif" I have no sound played. If I select "Integrated output" then I can hear back my ac3 created with Intel Compressor.
On this same computer, with my other project, AC3 PPC created or recently created on my Mac Pro with my old A.Pack software (from DVDStudio pro 2 or 3, I think), are read without difference between these two outputs.
Finally, Do you suggest me to re-encode all my files ? or should I use A.pack instead of Compressor - maybe Apple Developpers will correct it one day ?
I'm also upset because, I has a .DTS from a trailer that was accepted and perfectly integrated in my previous DVDSP version, and that I can't use anymore !

Change frame rate on an AC3 files?

I've been given two NTSC (23.98 fps) .ac3 files (5.1 Dolby Digital EX and 6.1 DTS-ES) that I need to use in a PAL 25fps project. Any suggestions as to how to change the frame rate to match my PAL encodes?

Marc Morris wrote:
I've been given two NTSC (23.98 fps) .ac3 files (5.1 Dolby Digital EX and 6.1 DTS-ES) that I need to use in a PAL 25fps project. Any suggestions as to how to change the frame rate to match my PAL encodes?
You shouldn't have to change the 'frame rate' of your .ac3 sound files. Both PAL & NTSC video use the same sound formats. The only problem you might run into is if you changed the duration of the video when you did the video conversion. Hint - keep the durations the same.
Have you have changed the duration of your video versions? If so then start by decoding your .ac3s and then running them through a 'time-strectching' program before re-encoding them to .ac3. Not very elegant I'm afraid.

How do I combine an .m2v file and an .ac3 file into a .mov file ??

Hello,
I had a question regarding Demuxing M2V and AC3 files so that they can be combined into a .mov file.
A few years ago I converted a .mov file into an .m2v and an .AC3 using Final Cut Pro. I lost the FCP Project and .mov files and only have the .m2v and .ac3 files left. When I tried to combine them together in FCP, the audio did not match up anymore even though it matches on DVD Studio Pro. I was told that I needed demux the files. How do you do that ???
Thanks so much for your time !!!
Happy New Year!
Doug Lantz

A few years ago I converted a .mov file into an .m2v and an .AC3 using Final Cut Pro. I lost the FCP Project and .mov files and only have the .m2v and .ac3 files left. When I tried to combine them together in FCP, the audio did not match up anymore even though it matches on DVD Studio Pro. I was told that I needed demux the files. How do you do that ???
Doug,
Am posting the workflow discussed in my last email here in the event others might be interested.
Best workflow I've found to resync and convert the M2V/AC3 elementary stream files to an MOV ProRes422/AIFF file are as follows:
1) Convert the AC3 audio file to AIFF. (My system is configured for AC3 so I used QT 7 Pro here. My only compaint at this point is that my original AC3 file was DD5.1 and my QT 7 Pro component only supports stereo conversions.)
2) Simultaneously drop-import the original M2V file along with the converted AIFF file to MPEG Streamclip (requires the QT MPEG-2 Playback component be installed).
3) Sample playback of the combined data to ensure audio and video are correctly in sync throughout the file.
4) Use the MPEG Streamclip "Export to QuickTime" File menu option to export the current date to the target Apple ProRes422 video target you want and pass the AIFF PCM audio through to the MOV file container without further processing.
5) Import the ProRes422/AIFF MOV file to your FCP bin and reset project default codec use to match imported file when asked so you don't have to do any re-rendering for final output.
6) I re-checked file playback in the Preview window to ensure A/V was still in sync before beginning edits in the project timeline.
All went well for me using this workflow. You may want to give it a try and let us know if it worked as well for you.
Good luck!

Silent AC3 files

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