MPEG-4 movie

hello all! having a bit of trouble with a downloaded mpeg 4 movie. have never seen this format before, and my quicktime on my PC is unable to play the video. i have audio, but no video. is there some kind of plug in or codec that i need to get for my quicktime to be able to play this file?
thanks for the help!
Toshiba PC Windows XP

oops...looks like i downloaded just an audio file when i thought i was getting both video and audio...solves my problem!
thanks!

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Everyone will have this problem. It is the way iMovie '08 is currently programmed. The basic problem is that most users fail to realize that there are three distinct levels of support in QT based applications:
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HT3775 I can't open MPEG 4 -movie files with Quick time or VLC

I can't open MPEG 4 -movie files with Quick time or VLC

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Quicktime X will not play some Apple Mpeg 4 Movie Files

Hi,
Having a strange issue. Quicktime X will not play some of my Apple Mpeg 4 Movie files anymore.
The files open fine in Quicktime 7, but not Quicktime X.
I receive the error message "The document could not be opened. A required Codec is not available"
I have installed other codecs (Flip4Mac as well as Perian), but no luck. Have re-installed Quicktime X (10.1) and software is all up to date (running Lion 10.7.2). The movie file works fine if I import it to iTunes as well.
Called AppleCare Support and they could not come up with an solution. Does anyone here have any ideas?
Thanks!

(BTW, I just realized this was an MPEG-4 topic - my issue wasn't necessairly centered around that architecture)
Yes, I naturally assumed that you were having problems at some point with MPEG-4 Part 2 or Part 10 content.
Since I mentioned "from," I should have mentioned what the codec/wrapper was (it was captured into a .mov file using DV/NTSC via "Capture Now" in Final Cut Pro studio V7, via an analog-to-digital converter). What makes this confusing is that files captured with the same settings sometimes open right into QuickTime X with their audio/video intact, and at other times, only the audio shows up (where upon opening that same file in QT 7, we can see both audio and video). Interestingly, the problem files icon shows up on the desktop as the generic movie icon, whereas the "normal" files' icon is the first frame of the video.
May we assume at this point that the source video data is DV-25 with 16-bit Interger (Linear PCM) audio sampled at 48.0 KHz and it is the scratch MOV file that may or may not open/play correctly in QT X but always opens correctly in QT 7?
Ultimately, though, this is an unimportant point in solving my issue. Why? Well, if I can successfully open the problem files in Compressor (e.g., see/hear the video/audio), then I can theoretically re-compress (or "re-wrap?") them to whatever codec I want - ideally one 100% compatible with QuickTime X.
I took a test file, placed it into Compressor, and applied the DV/NTSC setting to it (yes, I know, the same setting the file already had). After re-encoding (which took very little time), the file was perfectly executable in QuickTime X - both Audio and video showing as to be expected, and no real difference in quality (not that VHS source is quality to begin with).
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Could this have been answered without knowing the complete "from" specs? Probably… which is why I posted to the help forum in the first place - the goal being some other reader may have had the same issue, and had a handy solution or suggestion, saving me the time of experimentation (what forums are great for).
I don't know about you, but I would still be looking at profile/level combination settings to see if an an assumed MPEG-4/AVC video and/or AAC audio settings had been properly encoded for QT playback.
I have no doubt that there's a technical difference between the files that created this issue in the first place. But, the solution of re-compressing with an identical codec did the trick, which for this project is good enough for me.
Recompressing data is slower than rewrapping data which is slower than rereferencing the data pointers. But, if your solution works, then that is all that matters.

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Something is not right. An M4V should not be assumed to be protected content.
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Using the "Save As... Movie" (QT X) or "Save As..." (QT 7 Pro) option will copy the M4V file data to a "real" MOV file container (i.e. internals will match extension) or the "Save As..." option in MPEG Streamclip can copy the M4V data to a "real" MP4 file container. This would be a temporary workaround if you want your original data in properly headed containers that avoid your current problem (based on what you said about changing the file extension), but does not really address the real problem here. (Am assuming the files do not contain extraneous data tracks that MPEG Streamclip would filter out during the copy and that you have not mismatched the Snow Leopard embedded QT structure with the wrong QT X Player app.)
In any case, once the problem is isolated, I expect you should be able to fix it.

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skip

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Hi landonw
The HD will probably have to be removed from the MacBook Pro and connected to a USB adapter or placed in a dock to get your data off of it. I would take the MacBook Pro along, the folks at the Apple Store should be more than happy to help transfer your data to a new iMac.
{quote:}All I am really concerned about is my iTunes database and my firefox profiles.{quote}
What no BACKUP'
To protect your data in the future, pickup a USB External HD +(for under a $100)+ and use Time Machine.
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HT3775 MPEG-4 movie the quick time I get the following msg---1080p.mp4" could not be opened. The movie's file format isn't recognized.

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(Ignore Elementary stream)
Hit page 183 of Compressor's manual for more info.

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I thank you for the response. Apple does some assinine things sometimes and this is one of them. Ask the planet the difference between a movie and a home video and with the exception of Apple, you'd get 100% consenus on the what difference is. A home video is something that I shoot, like my kids birthday party. A movie is something I urchased either via download or a DVD that I ripped. Unbelievable! The fact that Apple has chosen not to distinguish based upon which folder I tell it is Movies and which folder is Home Videos is really hard to fathom - sounds like something Windows would do. I find it funny that in my iTunes movies sub-section of the movies section, the movie icons have a cloud icon in upper right corner to distinguish it as bought from Apple iTunes versus no cloud icon for movies that I have ripped - so the distintion was already made and clearly visible. Now - everything just defaults to "home videos" if I try to import a new ripped DVD - why even bother to have this distinction on the iTunes bar? WOW!
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Thanks again for your help.
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MPEG-4 movie

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