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  1. #1
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    Default Editing and joining mp4 files without losing quality.

    Hi All
    I have 4 .mp4 files I need to be edited and join together so that they can be played as 1 file with lossless quality.

    The original files are of the same quality and resolution and frame rate

    Are there any free or commercial programs that are easy to use that would do this please?

    TIA

  2. #2
    Apple free in Appleby KarameaDave's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    http://www.openshot.org/

    Should do the job.
    FTW

  3. #3
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    Default Re: Editing and joining mp4 files without losing quality.

    I use Videopad Video Editor (the free one). Works very well when you get your mind around it.

  4. #4
    ember BBCmicro's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    I don't think any of the consumer video editors do "lossless"
    but they are all quite good. You could get a trial version of Adobe Premiere Elements

    The important thing is to export the joined-up file with sufficient video bitrate, particularly if the video was taken hand-held and is therefore bouncing around a bit. (The compression doesn't work too well in such circumstances - the video is like a string of independent jpegs)

    I would run Mediainfo (a free app) on one of the original clips to see what the bitrate is, then export a test segment from the video editor and check it with Mediainfo. Fiddle with the editor's controls to get the video bitrate similar to the original
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  5. #5
    Mostly harmless member kingdragonfly's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    MP4 is "Motion Jpg"

    It's a little complex. You can decode (watch) MP4 lossless, but you can't encode (record) MP4 as lossless.

    In other words you can dump your MP4 movies into lossless format, and then combine those lossless files into a finished product.

    Since the link below for a list of lossless video formats. H.264 lossless is popular.

    https://en.wikipedia.org/wiki/Motion_JPEG
    https://en.wikipedia.org/wiki/List_o...eo_compression

  6. #6
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    Default Re: Editing and joining mp4 files without losing quality.

    #Knownothing
    Hi. Freemake Video Converter will do the job nicely and its FREE!!!! Load your files, edit them one at a time and save the cut version, clear the files entered, load the saved newbies and choose a format to convert to and click the tab top left reads Join Files....easy as...if you need any guidance PM me Here is a link to it http://www.freemake.com/free_video_converter/

  7. #7
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    Default Re: Editing and joining mp4 files without losing quality.

    Thanks for all your replies.
    @kioti
    I downloaded Freemake Video Converter. I didn't want to convert the files to another format as the original format, mp4 is fine.
    The finished file has a watermark imbedded in it.
    To get the watermark removed I need to pay a yearly subscription or a lifetime subscription all in US dollars.

    I am trying the other suggestions.

    I will get Mediainfo and have a look at the original files.

    Once again thanks to all.

    Knownothing

  8. #8
    In a 1920s time warp Terry Porritt's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    I use a cheap and cheerful free open source program from time to time: https://www.mp4joiner.org/en/

    It doesn't re-encode, and it doesn't have editing capability either, just a simple joiner.
    Remembering Rich Conaty, 1954 - 2016....."and don't you never forget, rhythm saved the world, Aloha"

  9. #9
    Apple free in Appleby KarameaDave's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    Quote Originally Posted by kingdragonfly View Post
    MP4 is "Motion Jpg"
    No, it's not.
    They are quite different
    Motion JPEG is a series of JPEGs strung together into a movie, so every frame is a 'keyframe'
    MPEG4 (MP4) has 'keyframes' at set intervals and between them only the differences are saved for each frame.

    This page third post gives a good explanation for you.
    https://arstechnica.com/civis/viewtopic.php?t=278505
    FTW

  10. #10
    Computer Technician wainuitech's Avatar
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    Default Re: Editing and joining mp4 files without losing quality.

    With MP4Joiner -- Be careful when installing, dont just go next next etc, if you're not careful you will install Avast Antivirus. Others That I use is the http://www.videosoftdev.com/ range of software, there's free and paid versions. They have several different types of editors/ joiners.

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