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  1. Hi!
    Please advise how to completely remove metadata from video file e.g Copyright, author etc.
    Thanks
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  2. Member Cornucopia's Avatar
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    Depends on filetype. Many options.

    But if all else fails, you always have these 2 options:
    1. Hexeditor do search & replace with zeros.
    2. Re-encode and don't include the metadata this time.
    Note, that last one only works for attributive/auxilliary metadata, not self-descriptive (which you should/must keep anyway).

    Scott
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  3. ffmpeg -i movie.mkv -map_metadata -1 -c copy movie_new.mkv
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  4. Member Cornucopia's Avatar
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    Very good option, blud7!

    Scott
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  5. Note that blud7's command may not copy all tracks (e.g. in the case you have multiple audio/subtitle tracks). That can be fixed by adding -map 0.
    Code:
    ffmpeg -i movie.mkv -map 0 -map_metadata -1 -c copy movie_new.mkv
    https://trac.ffmpeg.org/wiki/Map
    Last edited by sneaker; 26th Jul 2019 at 05:15.
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  6. Above examples work fine for container level but they doesn't remove metadata embedded in elementary streams - to remove them completely you need use additional filters.
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  7. Please advise how to completely remove metadata from MKV, Mp4 & wmv video file e.g Copyright, author etc.
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  8. Originally Posted by deepfrayder View Post
    Please advise how to completely remove metadata from MKV, Mp4 & wmv video file e.g Copyright, author etc.
    ...and hello again. Well it's been two weeks and you're back, I knew you would be.

    You see, the -map_metadata -1 get's used a lot in response to your question, and as you have probably found out, it's not the perfect solution, in fact, I don't know whether there is one.

    I was interested in this too a couple of years ago, I did some extensive searching and testing, I actually got a little peeved with it and gave up, was too busy at the time. I had found about 6 or 7 different approaches, all of which did 'something': Different 'metadata' options, '+bitexact' options and whatnot, I forget them all now. But look above at post #7 (pandy). In my own tests that is something that became apparent.

    I can remember at the time also being a little annoyed of other changes. Example, change different ffmpeg metadata options then load the file into MKVToolNix GUI, you're presented with lots of addition TAG tracks, I guess no big deal but it just didn't feel 'clean'.

    I guess, and it is a guess, a different approach may be needed depending on the container and formats contained within. I guess it needs someone who has a little time on their hands. It would be interesting to see if there is a perfect outcome or if the relevant information/knowledge/testing is available I can get something 'knocked-up' to do the task.

    Good luck.
    Wayne
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