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Activity Forums Compression Techniques -vcodec copy -acodec copy

  • -vcodec copy -acodec copy

    Posted by Richie Bee on June 23, 2011 at 7:41 pm

    Hi I was using -vcodec libx264 with -sameq

    and found the files were doubling in size

    so tried -vcodec copy

    and all fine and so quick to convert!

    is there any reason why I shouldn’t use -vcodec copy?

    Richie Bee replied 15 years, 1 month ago 2 Members · 2 Replies
  • 2 Replies
  • Michael Rampe

    July 4, 2011 at 10:57 pm

    [richie bee] “is there any reason why I shouldn’t use -vcodec copy?”

    Depends on what you are doing.

    If you are just repacking the stream into a different container or splitting the audio from the video, -vcodec copy is the right choice as it does exactly what you would expect, copy the stream without re-encoding.

    If you are changing bitrate, size, aspect or applying filters, this is not a good choice.

    Michael

  • Richie Bee

    July 5, 2011 at 9:04 am

    thanks

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