Re: Does iMovie 6 support USB camcorders?

In article <warren.oates-6759A1.22471514012006@xxxxxxxxxxxxxxxxxxx>,
Warren Oates <warren.oates@xxxxxxxxx> wrote:

> In article <sehix-620296.14134114012006@xxxxxxxxxxxxxxxxxxxxx>,
> Steve Hix <sehix@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > Well, you need to do some preprocessing before you can edit the content,
> > at least. (Demux it, for starters.)
>
> MPEG2 isn't multiplexed, it's video. It's usually paired with an audio
> track of some kind, and sometimes the two are multiplexed into .vob
> files for DVD. I say it's not editable because it was designed for
> "streaming" not for archiving.

Any MPEG-2 file that you can "watch" with audio tends to be
multiplexed. When not multiplexed, the separate streams are referred to
as "elementary streams." MPEG-2 video streams typically have the
extension m2v -- if you see the extension mpg, the file is almost
certainly muxed.

VOB files are just the Video OBject files that comprise content on a
DVD...they can be either MPEG-2 or MPEG-1 video with PCM, AC3, or mp2
audio. NTSC conformance says that at least one audio track must be PCM
or AC3 -- PAL doesn't have that restriction and, in fact, most players
will play NTSC DVDs with mp2 audio even if no AC3 or PCM track is
present.

MPEG-2 is also used for SVCD and HD transport streams (different frame
sizes and bit-rates, of course).

You can find out LOTS more on the subject at www.videohelp.com

--
Spenser
.

Relevant Pages

  • Re: gettimeofday
    ... I need to capture RTP ... streams and convert it to ... The incomming video will be in H.261 encoded and audio is ...
    (microsoft.public.development.device.drivers)
  • Re: How to properly block filter graph
    ... I guess my problem comes from my system to block the audio or video until I ... Is there perhaps a filter out there that does this for me? ... If you sink multiple streams, you should be carefull to not ...
    (microsoft.public.win32.programmer.directx.video)
  • Re: Media Centre-Vista- Lipsync
    ... There's no problem if the audio stream is also routed through the capture card but in some cases during recording the audio stream bypasses the capture card straight to the PC sound device which results in the sound being out of synch with the time delayed video. ... It would be very easy to miss the fact that video and audio streams were not coming from the same place.. ...
    (microsoft.public.windows.vista.general)
  • Re: no audio with Quicktime video streams
    ... > Can anyone get any audio to accompany the streaming Quicktime video at ... > or FC2 set up to properly play those video streams. ... > that had mplayer, mplayer-gui, and mplayerplugin installed with urpmi. ...
    (Fedora)
  • Re: DVR_MS to MP3 or WAV?
    ... The audio in the file is really MPEG-1. ... The video is MPEG-2. ...
    (microsoft.public.windows.mediacenter)