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  1. Member
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    Mar 2011
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    Paris, France
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    Hello,

    I need to view two video files side by side, with an easy way to start/stop/rewind/fastforward.

    Is there a free application that does this, ideally something as light and simple as VLC?

    Thank you.
    Last edited by yetanotherlogin; 24th Jan 2021 at 05:50.
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  2. Use two instances of VLC
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  3. If the two video displays have to be synchronized, it's not quite so simple. It would still be possible with mpv (with ffmpeg vf) or Avisynth.
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  4. Avisynth will play natively in mpc-hc/be mpv. For mp4/mov files you can use Lsmashsource as source plugin to avoid having to pre-index.
    The ffmpeg solution works directly with ffplay, mpv and maybe even vlc given that it is ffmpeg-based.
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  5. Member
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    Thanks much.

    I'm not clear how those parts play together, though.

    mpv, mpc-hc/be, vlc, and ffplay are players.

    Avisynth stands between the file(s) and the player, so that the player doesn't know it's actually talking to a server and not reading files directly.

    Does ffplay also need Avisynth, or can it play two files side-by-side on its own?
    Last edited by yetanotherlogin; 24th Jan 2021 at 13:00.
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  6. Avisynth and ffmpeg -vf are independent, but not so different ways of doing this.
    The advantage with ffmpeg is that it comes with built-in decoders (used by ffmpeg-based players such as ffplay, mpv).
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  7. Member
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    Thank you.
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