Author Topic: XMPlay AAC & MP4 plugin (Read 290269 times)

Rowan · « **Reply #150 on:** 17 Jun '08 - 13:55 »

Strangely they are now all streaming OK. Not sure what the difference is from before other than a reboot.

Looks like it works perfectly then

If it finds any it won't stream again I will look into it and let you know.

Thanks for all your help.

Auren · « **Reply #151 on:** 4 Aug '08 - 10:57 »

Ian, please add support for episodes in m4a-files (iTunes supports them natively). I uploaded a test .m4a-file with episodes to your FTP under the name Chill Out GenreCast - Episode 000.m4a

I need at least song name detection (like in .cue-files now). And it would be much better if covers of the songs are displayed too. But I think that it would be better to address the second request to Barna ;-)

Ian @ un4seen · « **Reply #152 on:** 6 Aug '08 - 16:54 »

I'm not sure what I'm supposed to be looking for in that file; please describe it

Auren · « **Reply #153 on:** 6 Aug '08 - 20:40 »

I'd better post a screenshot:

And read this, too: https://www.un4seen.com/forum/?topic=8808.msg60609#msg60609

And this: http://support.apple.com/kb/HT1597 (about "Enhanced Podcasts")

r · « **Reply #154 on:** 6 Aug '08 - 21:05 »

Hey Ian,

This article might help you:
http://blog.makezine.com/archive/2005/07/how_to_make_enh.html (scroll down to "Making the XML File")

Basically, Ian it's an XML file merged into the M4A that you're looking for...

Not sure how to find that! I'm not a coder!

----

AFAIK, there's only one piece of Windows software that creates enhanced podcasts (chapter points for M4As):
http://jrlearnsmedia.com/blog/archive/2007/07/29/enhanced-podcasting-on-windows.aspx

You might want to test that app out and see how the enhanced M4A is compiled.

Hope that helps!

Barna · « **Reply #155 on:** 7 Aug '08 - 02:03 »

These advanced information are stored in their own MP4 track, so it isn't part of the meta mp4 header as simple text tags are.
The data aren't stored as XML in the MP4 file anymore, they are joined into the whole MP4 stream to actually stream all the informations (cover images, titles, links) during playing.
One can dump these tracks with mp4box. The titles and the timing they apply to are stored in a text track with fourcc text (track 2 in the one podcast I got from beatport). The dumped rawdata alone isn't much, as it needs the track header which contains the actual offsets and timing information (timescale and durations).

You can get all the informations on how to find what at http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt
Yes it's big :-) First I thought I'd look at some libraries others have done... Then I found some huge uber complex libraries and decided to take the dirty route and just write a parser which gets me what I want (cover image data).

Ian @ un4seen · « **Reply #156 on:** 7 Aug '08 - 14:46 »

Thanks for the info, I see them now. Here's an update to try...

www.un4seen.com/stuff/xmp-aac.dll

Auren · « **Reply #157 on:** 7 Aug '08 - 16:14 »

Hey, that's damn fast, Ian! It works just flawlessly.

samplah! · « **Reply #158 on:** 7 Feb '10 - 10:41 »

niiiiiiiiiiice!!! finally i can listen to di.fm with aac

Thanks!

Lesmo16 · « **Reply #159 on:** 8 Feb '10 - 11:37 »

Quote from: Ian @ un4seen on 7 Aug '08 - 14:46

Thanks for the info, I see them now. Here's an update to try...

www.un4seen.com/stuff/xmp-aac.dll

Unfortunately this link doesn't work ---> 404 - Not Found.
Where can I download the plugin?

Thanks in advance.

Dotpitch · « **Reply #160 on:** 8 Feb '10 - 12:09 »

Quote from: Lesmo16 on 8 Feb '10 - 11:37

Unfortunately this link doesn't work ---> 404 - Not Found. Where can I download the plugin?

You can get in from the first post in this thread.

saga · « **Reply #161 on:** 8 Feb '10 - 17:56 »

How about trying the download link in the first post?

Lesmo16 · « **Reply #162 on:** 8 Feb '10 - 19:55 »

Quote from: saga on 8 Feb '10 - 17:56

How about trying the download link in the first post?

Well, in principle ...

I've downloaded and tried that one first.
It didn't work as it should work (looped the first samples of each track).
So I was looking for a fixed version in the growing thread.

BTW: @Dotpitch: Thanks for the friendly hint.

saga · « **Reply #163 on:** 8 Feb '10 - 22:13 »

Well duh, didn't see that there was already a new page.

Dotpitch · « **Reply #164 on:** 9 Feb '10 - 08:31 »

Quote from: Lesmo16 on 8 Feb '10 - 19:55

I've downloaded and tried that one first.

Looking at the dates, that is the latest version.

Quote from: Lesmo16 on 8 Feb '10 - 19:55

It didn't work as it should work (looped the first samples of each track).

Could you explain that a bit more? Does it keep looping the first second indefinitely, or doesn't it clear its buffers properly? Does it happen with all tracks, or just with some? With what encoder were those files made, and do they contain album art?

Chark · « **Reply #165 on:** 15 Apr '10 - 00:03 »

Hi, I have a question regarding this plugin. Does it support AAC HE and AAC HEv2 (SBR + Parametric Stereo)?

If so could it be possible to notify this in the info window? Right now it only says Advanced Audio Coding (MP4)... which is nothing really because you can tell that by the extension of the file.

Dotpitch · « **Reply #166 on:** 15 Apr '10 - 06:54 »

Quote from: Chark on 15 Apr '10 - 00:03

Hi, I have a question regarding this plugin. Does it support AAC HE and AAC HEv2 (SBR + Parametric Stereo)?

Yes, it does.

Quote from: Chark on 15 Apr '10 - 00:03

If so could it be possible to notify this in the info window? Right now it only says Advanced Audio Coding (MP4)... which is nothing really because you can tell that by the extension of the file.

Actually, that is not something you can see from the extension, since MP4 can contain different audio formats as well. I'll put it on the suggestions list.

Chark · « **Reply #167 on:** 15 Apr '10 - 12:08 »

Quote from: Dotpitch on 15 Apr '10 - 06:54

Quote from: Chark on 15 Apr '10 - 00:03
Hi, I have a question regarding this plugin. Does it support AAC HE and AAC HEv2 (SBR + Parametric Stereo)?
Yes, it does.

Thank you very much. I'm listening so some Internet radios which use AAC at about 40-50Kbps (so AAC HE is presumed) and would like to do it with XMPlay.

Quote from: Dotpitch on 15 Apr '10 - 06:54

Quote from: Chark on 15 Apr '10 - 00:03
If so could it be possible to notify this in the info window? Right now it only says Advanced Audio Coding (MP4)... which is nothing really because you can tell that by the extension of the file.
Actually, that is not something you can see from the extension, since MP4 can contain different audio formats as well. I'll put it on the suggestions list.

Thank you for the explanation, I've read more about it and you're right; MP4 is a container which can have several things inside (and M4A is only a extension rename).

Adding the info about which AAC version it is in the info window would be interesting, like VBR and so for mp3 files.

Ian @ un4seen · « **Reply #168 on:** 15 Apr '10 - 16:13 »

Here's an update to try...

www.un4seen.com/stuff/xmp-aac.dll

Chark · « **Reply #169 on:** 15 Apr '10 - 22:44 »

Thank you very much Ian, it shows now the type of AAC. I've tried several streams and identified all of the kinds. The only thing is that HEv2 uses SBR too, to be accurate it would be (SBR + PS) and the (LC) notation for the simple AAC may be droped as all of them use LC (they are kind of encapsulated from what I've seen today: http://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding). but as it is right now you can tell which kind of AAC you have there anyway.

By the way, I'm Chark, glad to be here

.

Chinese Sausage · « **Reply #170 on:** 16 Apr '10 - 18:46 »

Hello Ian,

Speaking on the AAC & MP4 topic, I sent to you an m4a file, which I've had problems playing (it skips) for some time. Do you you know why is this happening? It plays fine on other audio players. Please let me know if you received the file correctly.

Thank you in advance!
Ed

SmartOne · « **Reply #171 on:** 18 Apr '10 - 23:15 »

With DirectSound, if I play, stop, and then play a file again, I hear a bit of unflushed buffer before the new playback begins.

Dotpitch · « **Reply #172 on:** 19 Apr '10 - 06:21 »

Quote from: SmartOne on 18 Apr '10 - 23:15

With DirectSound, if I play, stop, and then play a file again, I hear a bit of unflushed buffer before the new playback begins.

Does that happen with all files, or specifically with AAC files?

Ian @ un4seen · « **Reply #173 on:** 19 Apr '10 - 13:44 »

Quote from: Chinese Sausage on 16 Apr '10 - 18:46

Speaking on the AAC & MP4 topic, I sent to you an m4a file, which I've had problems playing (it skips) for some time. Do you you know why is this happening? It plays fine on other audio players. Please let me know if you received the file correctly.

The file was received, but it is actually an ALAC file. I couldn't hear any skipping from it, so perhaps you are currently using an older version of the ALAC plugin? Let me know if it still skips with the latest version, and if it does, is there a particular point where it skips or is it throughout?

Chinese Sausage · « **Reply #174 on:** 19 Apr '10 - 20:15 »

Quote from: Ian @ un4seen on 19 Apr '10 - 13:44

Quote from: Chinese Sausage on 16 Apr '10 - 18:46
Speaking on the AAC & MP4 topic, I sent to you an m4a file, which I've had problems playing (it skips) for some time. Do you you know why is this happening? It plays fine on other audio players. Please let me know if you received the file correctly.

The file was received, but it is actually an ALAC file. I couldn't hear any skipping from it, so perhaps you are currently using an older version of the ALAC plugin? Let me know if it still skips with the latest version, and if it does, is there a particular point where it skips or is it throughout?

It skipped throughout. I was not aware that I needed the ALAC plugin, that was the reason why it wouldn't play at all. I updated it in the custom exe and now I can play it flawlessly with ALAC rev. 3. Again thank you very much for the help!

Author Topic: XMPlay AAC & MP4 plugin (Read 290269 times)

Rowan