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  1. Hi everyone

    I am searching method/good software to overlay image on video without conversion, I used 2 softwares Shotcut and Olive Video Editor to overlay image on the video and also to resize the image for hiding some unwanted parts on the video, the 2 softwares do it perfectly. (the overlayed image is static)

    But after I exported the new edited video, the original video which the size is (62 mb) became (6 mb) for the edited video (I kept the default settings for both softwares before conversion). ( the original video is MPEG-4 H.264 60 fps AVC file)

    I don't want that, I want that the new edited video conserve the quality and size like the original video.

    For example if there is method to overlay any image on the new edited video without conversion or any other methods to keep quality and size.

    Does anyone know how to solve this problem ?

    Thank you !
    Last edited by aaajan; 28th Jan 2021 at 05:52.
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  2. When you filter a video (ex: overlay an image) a conversion is always required, if you want to save the ouput.

    You need to find how to specify the output (H264) encoding parameters of your application to ensure quality isn't significantly degraded.
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  3. Originally Posted by butterw View Post
    When you filter a video (ex: overlay an image) a conversion is always required, if you want to save the ouput.

    You need to find how to specify the output (H264) encoding parameters of your application to ensure quality isn't significantly degraded.
    Thank you for your reply. Like you said, I checked encoding options section on Olive video editor I found those options like in screenshots, what I can do like changes ? And of course, I will let the codec in H.264 like the original video.

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  4. In your screenshot, where it says "constant rate factor" 23 , set it to some lower value like 15 to 18 . Lower values result in higher bitrates, less quality loss
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  5. Lower crf, currently at 23 (ex: try 18, lossless mode is crf 0).

    You can check the characteristics of the input and output videos with mediainfo.
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  6. Originally Posted by poisondeathray View Post
    In your screenshot, where it says "constant rate factor" 23 , set it to some lower value like 15 to 18 . Lower values result in higher bitrates, less quality loss
    Originally Posted by butterw View Post
    Lower crf, currently at 23 (ex: try 18, lossless mode is crf 0).

    You can check the characteristics of the input and output videos with mediainfo.
    I already have mediainfo , the good in this software (I mean Olive software) that it detect the video characteristics and preset settings as same as original video. I tried crf at 18 the size became 12 mb, when I tried crf at 0 it became 354 mb , is that normal ?
    Last edited by aaajan; 28th Jan 2021 at 12:15.
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  7. It might be normal;

    At crf 0, it should be larger than the original

    Did you use the correct project settings, and export settings in terms of dimensions, frame rate ?
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  8. Originally Posted by poisondeathray View Post
    It might be normal;

    At crf 0, it should be larger than the original

    Did you use the correct project settings, and export settings in terms of dimensions, frame rate ?
    Yes, it detect automatically the video characteristics and then preset the settings same details like the original video.
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  9. Member DB83's Avatar
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    Rather than experiment with crf, why not experiment with target file size ? All other things being equal, a slightly higher than the original might suffice.
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  10. Originally Posted by DB83 View Post
    Rather than experiment with crf, why not experiment with target file size ? All other things being equal, a slightly higher than the original might suffice.
    Well, I don't know if it will be effective, but I think crf method will do it automatically than do it manually like in screenshots (When I tried with different video it display the same target file: 700 mb).

    It is OK for me to stay at crf 0, if it won't lose the quality.

    What matters to me is that the edited video has the same quality like the original one without losing even a very small amount that I can't see.

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  11. Member DB83's Avatar
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    Re-read reply #2


    There will ALWAYS be a loss of actual quality when you alter something within the video. The loss may not be visually apparent but it is there even at crf 0.
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  12. Originally Posted by DB83 View Post
    Re-read reply #2


    There will ALWAYS be a loss of actual quality when you alter something within the video. The loss may not be visually apparent but it is there even at crf 0.
    OK I see. If there is no way to prevent the loss, then I can't do anything. I will stay at crf 0 better than anything.
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  13. Originally Posted by aaajan View Post
    OK I see. If there is no way to prevent the loss, then I can't do anything. I will stay at crf 0 better than anything.
    Hope you have a LOT of spare disk space.
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  14. Originally Posted by smrpix View Post

    Hope you have a LOT of spare disk space.

    Last edited by aaajan; 28th Jan 2021 at 13:43.
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