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  1. Occasionally I fire up CamStudio to make a short movie of my screen actions, to illustrate something in a newsgroup or forum. Camstudio records it all OK, and plays back video and audio correctly directly afterwards. But I always hit problems in the subsequent stages of preparing my movie if I forget that there's only one editor that processes it OK.

    I'd really like to get to the bottom of it with help here please. I've always been in a hurry to get the task finished, so this time I'll step through a small example methodically and show all the details.

    This capture was in a typical application (Memory-Map) and is only 7 secs duration. The file is CamStudioTest1.avi, at:
    http://www.speedyshare.com/714779974.html

    Even so, it's still over 9 MB in size. (The typical movie I tried to make earlier this morning was 2:40, 138 MB, which of course is why I cannot simply upload it as it stands.)

    It plays fine in all the players I tried.
    VirtualDub reports the following:
    Video stream
    Frame size, fps (us per frame) 1024x768, 25.000 fps (40000 uS)
    Length: 181 frames (0:07.24)
    Decompressor: CamStudio Lossless Codec v1.0 (CSCD
    Number of key frames: 7
    Min/avg/max/total key frame size: 1109913/1110148/1110234 (7589K)
    Min/avg/max/total delta frame size: 0/4939/13643 (840K)
    Data rate: 9537 kbps (0.05% overhead)

    Audio stream
    Sampling rate: 44100Hz
    Channels: 2 (Stereo)
    Sample precision: 16-bit
    Compression: PCM (Uncompressed)
    Layout: 91 chunks (0.08s preload)
    Length: 317961 samples (0:07.21)
    Min/avg/max/total frame size: 1764/13976/14112 (1243K)
    Data rate: 1411 kbps (0.17% overhead


    GSpot reports the following:
    --- Video Information ---
    Video Codec Type(e.g. "DIV3"): CSCD
    Video Codec Name(e.g. "DivX 3, Low-Motion"): RenderSoft CamStudio lossless Codec (LZO & GZIP compression)
    Video Codec Status(e.g. "Codec Is Installed"): Codec(s) are Installed
    Duration (hh:mms): 0:07.240
    Frame Count: 181
    Frame Width (pixels): 1024
    Frame Height (pixels): 768
    Storage Aspect Ratio("SAR")" 1.333
    Pixel Aspect Ratio ("PAR"): 1.000
    Display Aspect Ratio ("DAR"): 1.333
    Fields Per Second:
    Frames Per Second: 25.000
    Pics Per Second: 25.000
    Video Bitrate (kbps): 9536
    Quality Factor (bits/pixel)/frame: 0.485"

    --- Audio Information ---
    MPEG Stream ID (e.g. "0xbd"):
    MPEG VOB file Substream(e.g. "0x80"):
    Audio Codec (e.g. "AC3"): PCM Audio
    Audio Codec Status (e.g. "Codec Is Installed"): No Codec Required
    Audio Sample Rate (Hz): 44100
    Audio Bitrate(kbps): 1411
    Audio Bitrate Type ("CBR" or "VBR"):
    Audio Channel Count (e.g. "2" for stereo): 2

    But here's what happened when I opened it in the following programs:

    Womble MPEG Video Editor (DVD)
    Imported OK. Played the audio OK, but no video (black monitor window).

    MAGIX MovieEdit Pro 11 e-version
    (Just started learning the very basics of this new purchase.) On importing the AVI, hung solid. Had to be terminated via Win XP Home Task Mgr.

    MemoriesOnTV Pro
    Imported OK. Played but the video seemed to be about 3 seconds ahead of the audio. Rendered DVD MPEG naturally had same flaw.

    Windows MovieMaker

    Success! Imported OK. Previewed OK. Rendered OK. (To a 490 KB WMV.)

    So: why does it give all 3 programs problems of varying severity, yet MovieMaker handles it fine? And how can I get those others to like it too?

    --
    Terry, East Grinstead, UK
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  2. Member Krispy Kritter's Avatar
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    Jul 2003
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    Have you tried possibly capturing in a different format(codec)? I would expect Cam Studio to allow you different capture format choices. I wouldn't expect that you need to capture lossless either, especially when your final output will be a smallish file for web use.

    Bottom line, it's easier to capture in a format that your other program(s) can accept and use properly.
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  3. VH Wanderer Ai Haibara's Avatar
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    CamStudio does, but the performance during capture can depend on the codec you choose, of course. As for CamStudio's own capture codec, in my experience, it's worked okay enough for capture, but has given me headaches when it comes time to convert it to something else. I'd say that if you have a powerful enough system, choose a codec that'll be easier to convert or view later.
    If cameras add ten pounds, why would people want to eat them?
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