Dear Michael,
I am not expert on QT SDK, but I saw complete functionality in mp4lib. It is part of mpeg4ip project. Just download the complete package from http://mpeg4ip.sourceforge.net/ and find mp4lib there. I found it useful for managing 'mp4' files. I hope it help you too.
Regards,
* Roozbeh
----- Original Message ----
From: Michael Luongo <email@hidden>
To: Henry Mason <email@hidden>
Cc: email@hidden
Sent: Saturday, November 17, 2007 1:45:19 AM
Subject: Re: Shortcut converting MOV to MP4/M4V
Thanks for your response. I have tried what you recommended and I can't
get
it to work. I take a mov file with h-264 and AAC mono (we only paid for
mono
license) and use the exporter and it is converted to mpeg 4, stereo
AAC. I
tried both setting the two attoms as "past" or a boolean value of 1. Do
you
see anything wrong with the code? Thanks again. -Mike
// Open the MPG4 export component.
err = OpenADefaultComponent( MovieExportType, kQTFileTypeMP4,
&movieExporter );
if (err || !movieExporter) goto bail;
err = MovieExportGetSettingsAsAtomContainer( movieExporter,
&atomContainerSettings );
QTAtom atom = QTFindChildByID(atomContainerSettings,
kParentAtomIsContainer, kQTSettingsMovieExportEnableVideo, 1, NULL);
err = QTRemoveAtom( atomContainerSettings, atom );
atom = QTFindChildByID(atomContainerSettings,
kParentAtomIsContainer,
kQTSettingsMovieExportEnableSound, 1, NULL);
QTRemoveAtom( atomContainerSettings, atom );
FOURCC fccPast = 'past';
Boolean b_true = true;
err = QTInsertChild( atomContainerSettings, kParentAtomIsContainer,
kQTSettingsMovieExportEnableVideo,
1, 0, sizeof(fccPast), &fccPast, NULL);
err = QTInsertChild( atomContainerSettings, kParentAtomIsContainer,
kQTSettingsMovieExportEnableSound,
1, 0, sizeof(fccPast), &fccPast, NULL);
err = MovieExportSetSettingsFromAtomContainer( movieExporter,
atomContainerSettings );
AliasHandle alias;
err = QTNewAlias(&MovFileSpec, &alias, true);
MovieExportToDataRef( movieExporter, (Handle)alias, rAliasType,
theMovie,
0, 0, GetMovieDuration(theMovie) );
if (alias)
DisposeHandle((Handle) alias);
err = QTDisposeAtomContainer( atomContainerSettings );
CloseMovieFile(nFileRefNum);
// Export the file.
//err = ConvertMovieToFile( theMovie, NULL, &MovFileSpec, 0, 0,
fileScript, NULL, 0, movieExporter );
bail:
if ( movieExporter )
CloseComponent( movieExporter );
----- Original Message -----
From: "Henry Mason" <email@hidden>
To: "Michael Luongo" <email@hidden>
Cc: <email@hidden>
Sent: Friday, November 16, 2007 2:46 PM
Subject: Re: Shortcut converting MOV to MP4/M4V
> Use the the MP4 exporter with the "Pass through" option set for both
the
> video and audio formats.
>
> To do this programmatically:
>
> 1) Open the MPEG-4 export component using OpenDefaultComponent with
> MovieExportType/kQTFileTypeMP4
> 2) Get the settings as an atom container using
> MovieExportGetSettingsAsAtomContainer
> 3) Set the child atoms of the settings container of types
> kQTSettingsMovieExportEnableVideo and
kQTSettingsMovieExportEnableSound
> to be of value 'past' (use QTInsertChild)
> 4) Use MovieExportSetSettingsFromAtomContainer to add the settings
back
> to the component
> 5) Export it all using MovieExportToDataRef
>
> Note that step 3 is a bit of an undocumented hack, but it seems to
work
> for now.
>
> -Henry
>
> On Nov 16, 2007, at 10:54 AM, Michael Luongo wrote:
>
>> I have encoded a MOV with H264 and AAC. I need to convert it to mp4/
m4v
>> format. I can do this using the exporter component but it will
reencode
>> everything and takes a long time. Is there any shortcut from MOV to
>> MP4/M4V that will basically take the contents of the MOV and change
the
>> file format wrapper to MP4/M4V file? Or is it possible to encode
>> directly to m4v/mp4? I would really like to go straight to an
mp4/m4v
>> using the ICMCompress functions, but this does not appear to be an
>> option. So I am writing an MOV and then doing a conversion with the
>> exporter. Thanks -Mike
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