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  1. Member
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    Oct 2015
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    Seattle, WA
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    Recently I recorded my 15 hour journey using dashcam. ( It recorded 3 mins videos, I merged them all and now it is 15 hour long ).

    It is mp4 file, 30fps , 1080p . I want to make a timelapse video of this, say I want to convert this journey video to 15-20mins.

    I am on windows 8, ( I have mint, kubuntu, elemantry os on virtual box ). Please suggest a way to do this. Free software possibly

    I don't have any expensive software like Adobe Premiere, Vegas etc.
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  2. Member racer-x's Avatar
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    You can do it with avisynth: SelectEvery(60).AssumeFPS(30)

    You can also do it in Virtualdub or Aviutl. All are free.
    Got my retirement plans all set. Looks like I only have to work another 5 years after I die........
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  3. Member
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    Thanks racer-x, I have AVISynth and AvsPmod.

    I am unable to use it. I tried to load my mp4 file but it expects only avi files ( am I right on this? ). Then I figured out I need to use 'FFmpegSource'
    http://avisynth.nl/index.php/FAQ_loading_clips#How_do_I_load_MP4.2FMKV.2FM2TS.2FEVO_into_AviSynth.3F


    VirtualDub I have no idea. But I can download if that works.
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  4. Member racer-x's Avatar
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    VirtualDub works just fine, you''ll need the ffmpeg input driver to load your mp4. Then click Video > Frame Rate (Ctrl+R) and use the settings I highlighted in red...
    Image Attached Thumbnails Click image for larger version

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    Got my retirement plans all set. Looks like I only have to work another 5 years after I die........
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  5. Member
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    Thanks racer-x, this is doing what I wanted. Here is the problem it is creating huge files.

    With this setting my 167mb mp4 file becomes ~400mb AVI file. I am getting timelapse look though.

    Now, if I try to convert my 15hours , 43GB mp4 video it says, it will create 72GB AVI file. I expect we are having less frames in the new video so it should be actually smaller, then what is happening here.


    UNABLE TO UPLOAD IMAGE

    Here is imgur link:

    http://i.imgur.com/0dVplyZ.png
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  6. Mod Neophyte Super Moderator redwudz's Avatar
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    Did you set the output format? If not, it will be a default RGB format and create a huge file.
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  7. Member
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    Output format? I have no idea about this
    How can we do this?
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  8. Member racer-x's Avatar
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    Click Video > Compression (Ctrl+P) and choose from the list of your compression codecs.
    Got my retirement plans all set. Looks like I only have to work another 5 years after I die........
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  9. Member
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    Thanks racer-x, you are immense help to me.

    This is what I am using after your suggestion:

    Image
    [Attachment 34000 - Click to enlarge]

    http://i.imgur.com/74sXRZe.png


    Now, I have 13 minutes video , 1.11 GB ( Original 15hours 17minutes => 45.3GB )

    Original Codec ( saw this in VLC player )
    Image
    [Attachment 34002 - Click to enlarge]


    VirtualDub compression used:
    Image
    [Attachment 34003 - Click to enlarge]



    Is that fine? Or can I compress the file even more without losing much of the video quality? ( Or may be there is a software which can take this 1.11GB file ( 13mins ) and convert it to smaller file, but not that much degraded quality? )
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  10. Member racer-x's Avatar
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    It all depends on what you want your final format to be? There are a lot of options, some easy and some difficult.

    Easy would be installing x264_vfw codec. Chose that and set CRF=20. I don't like this because it puts AVC in an avi container.

    Dificult, but much better is to use the "External Encoder feature: https://forum.videohelp.com/threads/367446-Virtualdub-External-Encoder-feature
    Got my retirement plans all set. Looks like I only have to work another 5 years after I die........
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