Mpeg-1 Layer II / PCM support

Hello,
Does anyone know if there's a way to play Mpeg-1 Layer II
(MP2) or PCM(wav) audio formats with AS3/Flash10? I tried to play
these using NetStream and the Sound object, but with no luck. Does
anyone know if there's any way to play these formats, or if there's
a plan to support them in the future?
Ville Mustonen

This is not a Mac specific question, but a general QuickTime post. One of my clients has something like 100.000 hours of MPEG-1 Layer 2 audio programs (.mpa) that he wants to put on-line. Unfortunately, this format seems to be incompatible with HTTP delivery on QuickTime. If you try to connect to such a file's URL from QuickTime player, the player loads the file until its end (no progressive download) and then considers that it is made of a text track : QT Player displays a superb text track made of the binary data of the audio file! You can test it at the following address: http://www2.opsomai.com/TestRadioIna/KB0531501D.mpa
If your goal is to simply create a "fast start" file, why not simply put the audio in an MOV file container and unconditionally set the file property to open automatically once it is recognized as valid MPEG-1 data. Try this URL: http://homepage.mac.com/jrwalker4/.Public/KB0531501D.mov

Similar Messages

MPEG-1 Layer 2 audio support

This is not a Mac specific question, but a general QuickTime post. One of my clients has something like 100.000 hours of MPEG-1 Layer 2 audio programs (.mpa) that he wants to put on-line. Unfortunately, this format seems to be incompatible with HTTP delivery on QuickTime. If you try to connect to such a file's URL from QuickTime player, the player loads the file until its end (no progressive download) and then considers that it is made of a text track : QT Player displays a superb text track made of the binary data of the audio file! You can test it at the following address: http://www2.opsomai.com/TestRadioIna/KB0531501D.mpa
On the other hand, if you open the file locally with QT Player, it works almost fine. The only problem is the time it takes: it seems that QuickTime needs some time to scan the whole file before starting to play it. It takes around 7 seconds for a 1 hour file. If you save the file with QT Player then, allowing dependancies, you get a 1,5 KB QT movie (vs. the original 110 MB MPEG file) that plays immediately.
So, I plan to develop a small QT tool based on QT APIs in order to make these audio files compatible with HTTP progressive download:
1. When a file is required by a user, this software tool will open the audio file with QT on the server
2. The audio file will be then saved on the server, allowing dependancies, but the link to the original file will be modified: instead of the local path (e.g. /Volumes/Media/CollectionName/FileName.mpa) the tool will save its URL (e.g. www.collection.com/media/FileName.mpa). I hope that QT APIs will let us do that, and that the resulting reference movie will be compatible with QT progressive download mode.
Taking for granted that this method works, which I don't know at this time, it has a major drawback: my tool will take around 7 seconds to open the original file, so it will roughly take 8 seconds before the user can start to download the audio file. It can seem reasonably short, but we really don't need that delay, because most of the time we need also to trim the file before this operation, which may take 5 seconds or so, using mpgtx, an open source software.
I wonder if I could use a different method in order to make these file downloadable with QT. Something like what QTFaststart can do with MPEG-4 file (in one second or so, it can modify a MPEG-4 file header in order to make it compatible with QT progressive download). Such a opensource software would be very useful. I could even merge it with mpgtx, so I can cut my excerpt and make it downloadable at the same time.
Any idea would be welcome!
David

This is not a Mac specific question, but a general QuickTime post. One of my clients has something like 100.000 hours of MPEG-1 Layer 2 audio programs (.mpa) that he wants to put on-line. Unfortunately, this format seems to be incompatible with HTTP delivery on QuickTime. If you try to connect to such a file's URL from QuickTime player, the player loads the file until its end (no progressive download) and then considers that it is made of a text track : QT Player displays a superb text track made of the binary data of the audio file! You can test it at the following address: http://www2.opsomai.com/TestRadioIna/KB0531501D.mpa
If your goal is to simply create a "fast start" file, why not simply put the audio in an MOV file container and unconditionally set the file property to open automatically once it is recognized as valid MPEG-1 data. Try this URL: http://homepage.mac.com/jrwalker4/.Public/KB0531501D.mov

Codec: MPEG-2 Video, Linear PCM doesn't function in iMac 10.8.3

I have recently purchased an iMac OSX version 10.8.3 which has Quicktime v10.2. Today while working to edit some old digitized footage I opened up some files that were shot on a Sony FX1 shot in HDV 1080i60 and digitized through FCP (Final Cut Pro) which made them into MPEG-2 Video, Linear PCM, Timecode files files. On my older MacBook Pro 10.5.8 I can open them with Quicktime 7.6.9 and play the files without a problem (it also has FCP with Qmaster, etc). In my research I found I can open and view the files on my iMac, if I open them with VCL. Also note I can open them on the QT player in the iMac and hear the audio just no video.
Now I did read some responses that include converting the footage to H.264 or some other format, however I am dealing with over 500gb of footage so that's not really a viable issue. My assumption is that I am going to need to purchase some upgrade to QT to get this stuff to play or hopefully download a compatible software that will make this all go away with little trouble...
Does anyone know of the software that could solve this problem? Any personal experience out there for solving this?
Thanks in advance for your time and consideration.

I think the answer to this in no-not that I know of, unless it was installed as part of the stock purchase. However I am NOT getting a message from MPEG StreamClip to install it or anything for that matter. Instead when I drag and drop the file into MPEG StreamClip I get a white screen from which I can play audio, but no video.
The QT MPEG-2 Playback component is sold by Apple so I assume you would know if you had purchased and installed it. The lack of a message from the MPEG Streamclip app would tend to indicate that either the file you are trying to open does not contain MPEG-2 compressed data or that the data is not being read/loaded to the application. Since you indicate the file opens in apps like VLC, the QT Player, and MPEG Streamclip, can you post a copy of the "Media Information", "Inspector", and "Show Stream Info" windows. (Am assuming here that the MPEG-2/PCM data is not "muxed" within the MOV container which is a separate problem.)
I reviewed the article and downloaded QT7 on this version of iMac, which I gather that it was not there before. However the footage problem is not resolved. I did read where the article suggests I purchase QT7 Pro...is this the next step in the trouble shooting? Do I need to purchase this? It this what you are referring to as the component that need be purchased or is there another? And if no, do you know where can I find the Apple playback component?
a) If you upgrade an older operating system to Snow Leopard, Lion, or Mountain Lion and had QT 7 Pro installed on the older system, then the system installer should normally install a 32-/64-bit compatible version of QT 7 and apply the "pro" key automatically. Systems purchased with Snow Leopard, Lion, or Mountain Lion pre-installed do not have a QT 7 player installed.
b) It would be expected that QT 7 v7.6.6 would not play the file if MPEG Streamclip (which you previously tried) could not play the file. Both apps access the same embedded QT structure within the operating system and employ the same codec component configuration installed on your system.
c) It would be a waste of time and money to purchase a QT 7 "Pro" key if you cannot play the file using the standard player since the "Pro" key only adds editing features and not new playback components. Once playback is working you can consider your need for the "pro" features.
d) See http://store.apple.com/us/product/D2187Z/A/quicktime-mpeg-2-playback-component-f or-mac-os-x?fnode=62 You will note that this component is not required for/not used by QT X based apps but is still required for QT "classic" based apps such as QT 7/QT 7 Pro, GarageBand, MPEG Streamclip, etc. once you get it installed—which is another problem.
I do want to purchase and install...can I find this within this Apple site or are there other Apple supported sites I can find it?
See Apple Store link above. However, my personal recommendation at this point would be to hold off on this purchase until it is determined just what your current playback problem is. For instance, can you post a sample problem file for download in order to examine/test on my system?
I am not sure I understand how to answer this completely, however I trancoded/imported these files from tape through the capture feature in FCP5 and the files have been living and transfered from drive to drive over a series of 8 or so years. They have never NOT played on my MacBook Pro which was not actually the computer they were created from, but since they functioned here I didn't think twice about. However I don't think this is answering your question. It may be best to ask how do I learn about if they are orphaned or not, so I can properly answer?
Basically, a media file consists of a container in which data is placed. In some cases only certain foms of compressed data can be contained in a specific container type. In other cases, multiple or any form of compressed data can be contained. For instance, an MOV file container may hold any form of compressed data that was compatible with the codec component configuration for the system on which the file was created. Unfortunately, this does not mean the file will be compatible with other systems. Since you indicate the files were imported or captured by FCP5, their compression format would depend on both the tape device and/or "Easy Setup" software option used to store the original digitized data which thereafter may or may not have been re-rendered to another compression format during or after your project was completed as part of the "output" process. Since there seems to be some question as to the actual compression format of the data you are trying to access, the first thing you need to do is reconfirm this information. Here are the usual medods of doing this:
a) If files do not open in any media player, use the Finder "Info" window to see what it can tell you about the file. This information may be minimal.
b) If the file opens in a media player app, then use that app's "Media Info", "Inspector", "Stream", "Properties" or similar window to see what it can tell you.
c) You can also use a dedicated utility app like MidiaInfo (free) to examine the file characteristics. These apps usually provide the most information.
(NOTE: In the case of most of these apps, it is usually best to simply screen capture the information window and post it to the forum since most users fail to provide suplementary details about the file which may or may not become significant later.)
d) "Orphaned" files usually refer to "reference" files. Reference files do not contain all of the data needed for playback. Instead, they contain a resource pointer to another file that actually contains the needed playback data, as well as, playing instructions telling how the resource data is to be played. When a reference file is moved to a different drive, the resource data must also be moved. It it isn't, then the data will become "orphaned" when the reference file tries to locate and play it. Reference files are usually very small and are handy for the passing of data from one application to another—such as when sending data from FCP to DVDSP for burning or from iMovie to iDVD. If your files play in VLC then either they are unorphaned reference files or they are standalone files. So, once again if the files play in VLC but not in QT, then we need to look at the specific compression formats involved to determine just what the problem is.
THIS IS GREAT NEWS! This is an issue of great interest to me. I copied FCP6 from my MacBook Pro to my iMac, but the files did not function. I also attempted to install them from disk, but I received a message that the software is not supported. I was under the impression FCP 6 was not compatible with this iMac and Mountain Lion, then I had heard from a friend that they corrected that but I haven't seen any change on my system and I have update my software to current at this point. Do you have thoughts on this and/or how I can get my FCP 6 to function on my iMac? I would love to be able to make use of it.
In my case, I migrated the everything (including the FCP Suite installation) from my Leopard system to my new iMac while it was operating under Snow Leopard and updated the iMac to Lion and later to Mountain Lion. Based on what you say, it appears the FCP installer, like the QT MPEG-2 Playback Component installer package, is not compatible with Lion or Mountain Lion. This does not mean the apps are not compatible with these systems but it does likely mean you would have to use a third-party app like Pacifist to install the FCP software package. (Pacifist can also be used to install the QT MPEG-2 Playback component instead of the "helper" intaller utility provided in the MPEG Streamclip download mentioned above.) Have not really tested this method of installing FCP on Mac OS X v10.8.3, but it does seem logical that it would work since I can still use FCP still operated under Mountain Lion.

MPEG-2 Video Linear PCM Timecode no longer working in FCP7

I edit daily with Final Cut Pro 7.0.3 on my MacBook Pro. I have several projects in which I imported files from an MR HD-100 hard drive. Not only did I successfully edit several projects, but I could open the individual files in QuickTime. They are 1280 x 720 MPEG-2 Video, Linear PCM, Timecode HD (1-1-1) files. Now suddenly they will not open. All I get is a white screen in Final Cut. Even the old finished projects I open in Final Cut show a white screen where this footage used to be. When I try to open one of the files in QuickTime I get the message, "An invalid public movie atom was found in the movie." I have not needed any type of conversion to make these files compatible before. They just worked. Any ideas as to why they suddenly won't work now?

I finally had time yesterday and today to tackle this problem. I read the link you sent and jedi knights had the solution if you had access to a mac still running 10.6.7 which I did not. So.....I bought a 32gb flash, intalled osx 10.6.3 from my disc, reinsalled QT7, did the 10.6.7 update, installed FCP7 so the codecs would load into QT and then transferred the one file (System/Library/QuickTimeComponents.component/Contents/MacOS/QuickTime Components) onto my laptop. ALL IS NOW RIGHT WITH THE WORLD!
Thank you for your help.

Why is my iPhone 5 skipping/not playing any of my songs in an mpeg-1 layer 3 file format? This only started happening after I updated to iOS 8.

I'm getting really upset with this ridiculous nonsense!! Ever since that lousy upgrade to iOS 8, mind you I did not get the worthless recalled iOS 8.0.1 update, my phone has been freaking out. Glitching and freezing are now common place and my apps, which I have never had a problem with in the past, are now crashing without warning. To top it all off my phone, which has had NO problems in this area before iOS 8, is all of sudden skipping and now deleting all of my mpeg-1 layer 3 music files without my consent!! This leads me to assume that the only two explanations are 1) this is just a huge screw up on Apples part and now several of their technical lackeys are feverishly working to get a reasonable working update out and to quell a lot of unnecessary headaches like mine and many others OR 2) Apple is now forcing our hand in purchasing songs only in their own personal format, MP4 I believe it is. Either way, I'm more than a little ****** off and I'm sure Steve Jobs is rolling over in his grave at the large amount of excrement disguised as Apple products and operating systems his beloved company is dumping on it's faithful customers.

Try
Settings > iTunes & App Store > Apple ID: > Sign out then sign back in.
Assuming you have Internet connection to the Internet.

MPEG-1, layer 2 cannot be copied on iPod from computer

Is it normal that a MPEG-1 layer 2 (layer 3, I don't even know what those mean!)
cannot be transfered from iTunes on my G5 to my iPod (iPod Classic 30GB, software 1.3)?
I noticed that I can transfert MPEG-1 layer 3 with no problem.
Is there any way I can modify a layer 2 file into layer 3 and vice versa?
What are those layers anyway?
Thanks
Louis

Fawlty Towers
At least you have an excellent sense of humour!
I still don't know what layers 2 and 3 are.
Here would be a good place to start:
http://bmrc.berkeley.edu/frame/research/mpeg/faq/mpeggeneral.html
It's complicated, but if you really want know...
Message was edited by: Nick Holmes

MPEG-4 Video, Linear PCM

Hello,
I transfered files off a Sony XDCAM to my MAC to edit in Final Cut Express. The file shows up as an MP4 but when you look at it, the codec is MPEG-4 Video, Linear PCM. Quicktime and FCE do not recognize it and I'm not surprised. My question is what do I need to convert the file to so I can use it in FCE and what is a good software to do that?
Thanks!
Scott

grantza wrote:
I need some help with a corrupt file. Its a quicktime movie file (MPEG-4 Video, Linear PCM) recorded via the iSight camera using EvoCam. At the end of the recording I had to "force quit" EvoCam. As a result, the movie file was not completed properly and will not play.
Any help on this would be most appreciated.
I never tried this, but the best possibility I can offer for corrupted video files is a great find that was offered by user mns579 in another topic:
http://www.aeroquartet.com/movierepair/repair.html
If the freeware finds that repair is possible, you can decide whether the importance of the corrupted recording is worth the cost of repair.
Mac Pro Quad Core (Early 2009) 2.93Ghz w/Mac OS X (10.6.3) MacBook Pro (13 inch, Mid 2009) 2.26GHz (10.6.3)
LED Cinema Display G4 PowerBook 1.67GHz (10.4.11) iBookSE 366MHz (10.3.9) External iSight

MPEG-1 Layer 3 Audio Files

Will MPEG-1 Layer 3 audio files work on the iPod Touch 4g?
They work okay in iTunes on my computer.
Thanks.

Yes. I noticed that in the Advanced drop down menu. In a test conversion from MPEG-1 Layer 3 to AAC, the file ballooned from 4.8 to 6.5 MB. I'm presuming AAC would be the best choice.
I have hundreds of MPEG-1 Layer 3 tunes. I see that I can select multiple files for conversion, but that is still tedious.

Downloading MPEG-1, layer 3 music

I have downloaded music files in MPEG-1, layer 3 format. I have a Windows XP platform. I have installed the latest version of iTunes. The files play through the computer in iTunes. The iPod crashes when the files are selected from a playlist. Is the format incompatible with iPod? Is it possible to convert the files into an iPod friendly format?
iPod Windows XP

Yes. I noticed that in the Advanced drop down menu. In a test conversion from MPEG-1 Layer 3 to AAC, the file ballooned from 4.8 to 6.5 MB. I'm presuming AAC would be the best choice.
I have hundreds of MPEG-1 Layer 3 tunes. I see that I can select multiple files for conversion, but that is still tedious.

Audio issue H264 - MPEG-4 AVC / audio PCM U8 (u8 ) 12000 khz

Hi all
I have this issue with pp cs5 - 5.0.3
Importing a 720p .MOV clip from a compact camera "canon powershoot a3300 is", the video preview, editing and quality is ok but the first 3 second of audio is looped along the clip duration.
All the player, quicktime 7.6.9, Vlc, play the clip and the sound is good.
Gspot say: codec avc1 - H.264 audio raw 8-bit unsigned 12000 hz
Vlc say: H264 - MPEG-4 AVC (part 10) (avc1) audio PCM U8 (u8) mono 12000 hz
Qt say: H264 1280x720 - 8 bit - mono - 12.000 khz
With other clip from my sony xdcam ex1 or other format... premiere cs5 go fine
Another system with premiere cs4, the import and the editing is ok.
Any ideas?
thanks

thanks
I had already tried but not working
The video is ok with all the preset that match 720p ...but not the audio
...i think is a codec issue

MPGA aka MPEG 1 Layer 1 Audio

I've spent the better part of this evening looking for an MPGA plug-in for Quicktime. I have a considerably large collection of videos (mostly) encoded with Xvid for video and MPGA for audio so running 160gb+ worth of video through Divx Doctor II isn't exactly an option. I have VLC and I used to use it all the time but with a new iMac on the way, I would like to figure out a way to play these videos in Front Row (hence Quicktime).
If anyone could point me in the direction of an MPGA codec it would be much appreciated. Thanks.
-Shaun

All of the files in question are AVI's.. The video is in Xvid and as most of these were recorded via a capture card, the most common audio format seems to be MPEG1 Layer 1. I haven't tried the transcoding option yet although I'm a little reluctant to do so seeing that it would probably take a couple hours per file. I know that at one point, the sound in these worked in QT (probably QT6 but it may have been 7) I just can't figure out why it's not working now.
Matti: I've tried installing as AC3 codec just in case and it was a no go but I do know what you mean. I was under the impression that QT and MPEGs got along famously. It's really rather sad, if I can't figure out a way to play my existing video collection in QT (and by extension Front Row) I'll simply never use Front Row.
Just for the sake of satisfying my curiousity, I used Divx Doctor II on a file. It fixed the audio but the video became choppy, laggy and unwatchable.

MPEG-1 Layer 2 supo

I have many audio files in MPEG- layer 2 coded, why the Creative Zen player can't play my music
What do i need to do to player to play those files.
My model is Creative ZEN 4GB with the latest firmware from creative.
Thank you .

Use either MediaCoder or SUPER to convert them to MP3. I believe the Sync Manager software that came bundled with your Zen will transcode unsupported audio files to WMA during sync but I don't use it so I'm no expert there.

What is the minimum server layer OEM version supports SNMP trap reception ?

Hi:
- I have been trying to enable SNMP trap reception on an OEM plug-in.
- I turned on debug channel for recvlets.snmp and saw:
2009-10-16 16:07:42,808 Thread-3028552624 ERROR recvlets.snmp: Duplicate threshold : test900, oracle_guide, interfaces, status
and
2009-10-16 16:09:08,382 Thread-3021634480 INFO recvlets.snmp: Trap received is to convert Data Point
2009-10-16 16:09:08,379 Thread-3021634480 INFO recvlets.snmp: Sending Data Point ...
2009-10-16 16:09:08,379 Thread-3021634480 INFO recvlets.snmp: Listening for TRAP
So, it looks like the OEM agent can receive traps but no data point or alert appears.
And, the agent always issues an error about duplicate thresholds.
- Does the agent have to be patched ?
My agent is:
Oracle Enterprise Manager 10g Release 5 Grid Control 10.2.0.5.0.
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
Agent Version : 10.2.0.5.0
OMS Version : 10.2.0.1.0
Protocol Version : 10.2.0.0.0
Agent is Running and Ready
- on the server layer, the oms is:
Oracle Enterprise Manager 10g Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
Oracle Management Server is Up.
Is a patch needed for OMS ?
Should OMS be version 10.2.0.5.0 ?
Thanks
John
Edited by: user8826739 on Feb 23, 2010 7:17 AM

10.2.0.5 should be fine ...
Dave

Cisco NAC Layer 3 OOB Support for Wireless

We are currently using NAC 4.7.2 and I am curious if Layer 3 OOB for Wireless users is on the roadmap. We have a WISM and 5500 controllers. Thanks.

Hello,
I know it's being worked on, but isn't in the near releases coming out soon. 4.8 is expected very soon and it's not in that release.
So long story short, don't know, but it will be there eventually.
HTH,
Faisal

Mpeg 1 layer 2 radio recordings crackle

Hi
I'm getting crackling on radio recordings (mp2) captured by Hauppage Freeview box when playing in Windows Itunes 7.0.2.16, on both my Desktop and Laptop PCs. Any ideas. The files play perfectly in Power DVD
John

Fawlty Towers
At least you have an excellent sense of humour!
I still don't know what layers 2 and 3 are.
Here would be a good place to start:
http://bmrc.berkeley.edu/frame/research/mpeg/faq/mpeggeneral.html
It's complicated, but if you really want know...
Message was edited by: Nick Holmes

Mpeg-1 Layer II / PCM support

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