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add audio after the fact?

Hi folks,

I've been playing with and simply love CamStudio, but I haven't found in the docs (or online in searches) any info on audio being able to be added to a vid after the vid is made. I want to do a type of tutorial, and doing the voiceover while recording the video is giving me fits (i get 90% done and flub the text...have to start over, y'know?).

Anyway, I'm not sure if this is an option or one planned for a new release, so I thought I'd ask

Thanks and best regards,
-Ray

Comments

  • edited April 2008
    I have no idea if this is planned for a future release or not, but you could do it with other programs. Here are a couple of the methods I can think of (as always, there are other ways):

    One way would be to use Windows Moviemaker, which can record narration - the function can be found on the Tools menu. Of course, you are limited when it comes to output, and if you wan't anything other than Windows Media you'd have to export a DV AVI-file, and recompress that in another program.


    Another way is to use Audacity to record the audio, and Virtualdub to combine it with the video. Record in Audacity by simply clicking the big record button on the toolbar, and export as a WAV. The resulting file will be big, but don't worry, it will be compressed in Vdub. Open the video in Virtualdub, and to load the audio choose "WAV Audio" from the Audio menu. A window will pop up, where you can choose your WAV-file. Then, select "Full processing mode" from the Audio-menu and choose the codec in Audio --> Compression. If you wan't to recompress the video, go to Video --> Compression, if not, choose "Direct Stream copy" from the Video-menu. When done, go to File --> Save as AVI.

    Note: If you're using SWF Producer to make a Flash-video, then there is no need to recompress neither the audio nor video, so set both to Direct stream copy.


    A third way produces a MKV-file in stead of a AVI-file. When exporting the audio from Audacity, use Vorbis or MP3. If you choose OGG Vorbis, you can lower the quality setting to 0: Edit --> Preferences --> File formats-tab. Drag the "OGG Export setup"-slider all the way to the left. The file will be a lot smaller. If the video needs to be recompressed, Virtualdub can do that.

    To merge audio and video into one file (called muxing), a program called MKVmerge, part of MKVtoolnix, can be used. It is as easy as dragging-and-dropping both files into the program, and click start. The process will only take a couple of seconds.

    Links:
    Virtualdub: http://virtualdub.org/
    Audacity: http://audacity.sourgeforge.net/
    MKVtoolnix: http://www.bunkus.org/videotools/mkvtoolnix/downloads.html#windows

    If you've got any questions on any of the programs, or methods described, just ask away.

    Very late edit: Just saw that I written "video" a place where it was meant to say "audio". Fixed that now.
  • I record my training sessions in short avi clips and then combine them (splice) using Avidemux which is open source. http://avidemux.sourceforge.net/. This allows me to not only correct errors quickly but also to take the different components and re-mix them to make new classes. Think of it as legos for movies.
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