Using MPEG Streamclip for Mac #02

MPEG Streamclip tutorial






Using MPEG Streamclip for Mac #02: Compression and Demultiplexing

In the second video tutorial of the MPEG Streamclip series, we focus our attention to application’s export and demuxing functions. And this is a good opportunity for us to discuss basic characteristics of some of QuickTime components. So we spend several minutes explaining basic characteristics of some of popular QuickTime compressors.

Furthermore, we also explain briefly how the MPEG-4 compression works. We will answer the following questions:





  • What is Multipass?
  • What is B-Frames?
  • How does the Quality slider work?





  • Meanwhile, if you have MPEG files to edit, it is essential that you know how to demux video files. Why? By demuxing an MPEG file into audio and video streams, you can deal with them separately. And Final Cut Pro 6 recognizes M2V files. So you don’t have to convert MPEG-2 files into DV any more. If the video clip contains AC3 audio, you can just take AC3 and convert it into AIFF or whatever QuickTime or Final Cut Pro can decode. Then you can read them separately or mux the original track and a new audio file into an independent MPEG-2 file if you want. (Watch “Using MPEG Streamclip for Mac #03” for MPEG Streamclip’s muxing function.)

    Keywords: DV, DVCPRO – NTSC, Save As, MOV, AVI, MP4, Export to QuickTime, Sorenson Video 3 Compressor, H.264, Apple Cinepak, HDV, Apple Intermediate Codec, Apple Photo – JPEG, Apple MPEG 4 Compressor, Apple PNG, Multipass, B-Frames, Quality, Quantizer, Uncompressed, MPEG-4 AAC, MPEG Layer 2, Demux to M2V and AIFF, Demux to M2V, Demux to AC3  





    MPEG Streamclip video tutorial MPEG Streamclip video tutorial





  • MPEG Streamclip version: 1.8
  • VTC version: 1.0
  • Length: 8 minutes 25 seconds
  • Video format: QuickTime
  • Video compression: H.264
  • Pixel size: 900 x 675
  • Audio effects: Enabled
  • Audio commentary: Enabled




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    MPEG Streamclip is a product of Squared 5.

    4 thoughts on “Using MPEG Streamclip for Mac #02

    1. Maybe I havent read clearly, but how do you edit a DVD (.VOB) file? (Movie)
      When I finish my edit, I hit save-it warns me ive edited the stream, do I really want to quit? and the only option is to turn it into a .TS file-which will not integrate back into making an edited DVD.

      Ive been able to edit/cut beginnings and ends of streams, but never the middle

    2. The VOB file is multiplexed. So if you edit the clip, you won’t be able to save it as a VOB file, I suppose (personally never done it). You need to demux it into parts to fully edit the clip.

    3. i am trying to demux an mpeg file using streamclip to be able to use it in imovies but when its in m2v and aiff format neither quicktime nor vlc will play them together tho they are in the same directory. It plays them fine seperately. Does anyone know what I have to do be able to import it to imovies? thanks!

    4. Do you have MPEG2 Playback component in your System? If you do, I don’t see why your QT doesn’t let you decode both at the same time.

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