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  • FFMPEG Zoom pan to a particular coordinate x and y in a video

    23 novembre 2024, par crysis

    I'm trying to zoom-in in a video at a particular coordinatates x, y when video reaches at timestamp in duration. I'm using this command for the zoompan filter

    


    x = 784
y = 550
timestamp = 2
width = 1920
height = 1044

zoompan_filter = (
    f"zoompan=z='if(between(in_time,{timestamp},{timestamp + 0.5}),"
    f"1+2*(in_time-{timestamp}),"
    f"if(between(in_time,{timestamp + 0.5},{timestamp + 1}),"
    f"2-2*(in_time-{timestamp + 0.5}),1))':"
    f"x='{x}-(iw/zoom/2)':y='{y}-(ih/zoom/2)':"
    f"d=1:s={width}x{height}"
)


    


    x and y are the coordinates where I want to zoom in. This filter works fine for most of coordinates but the zoom is weird near center of the screen. It zooms in a straight line then suddenly pans to right a little when zoom about to end.

    


    enter image description here

    


    How do I make the zoom straight ? Any help would be greatly appreciated.

    


  • FFmpegMediaMetadataRetriever returns setDataSource failed : status = > 0xFFFFFFFF

    26 août 2015, par Alireza

    This is a weird error ! because it sometimes works but sometimes doesn’t work. I’m using FFmpegMediaMetadataRetriever to get the thumbnail from a video using an URL path. retriever.setDataSource(((Video) obj).getVideoAddress()); return following error :

    java.lang.IllegalArgumentException : setDataSource failed : status =
    0xFFFFFFFF

    This is my code :

    FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
    
            Bitmap bmp;
    

    
            retriever.setDataSource(((Video) obj).getVideoAddress
    
                    ());
    

    
            bmp = retriever.getFrameAtTime();

    Note : I checked the INTERNET permission and it exists. The problem is exists with some videos but with the same format ! I mean the only difference between videos is bit rates, length, size and others like this but not the file format.

  • aspect ratio is changed using ffmpeg sameq and codec copy

    21 mars 2012, par Vishal Parekh

    i am using ffmpeg to extract clip from mp4 video,

    i tried with "-acodec copy -vcodec copy" and "-sameq"

    in both, aspect ration of generated file is changed.

    (
    ffmpeg -sameq -i "input file" "output file"

     ffmpeg -i "input file" -acodec copy -vcodec copy "outputfile"

    )

    source file is of aspect ratio
    sar=4:3
    dar=4:3

    new file is has aspect ratio
    sar=4:3
    dar=1:1

    please help me to solve this problem,

    one weird thing is when i see details in another video tool, it shows me
    sar=4:3
    dar=4:3
    of source video

    but when i use command ffmpeg -i sourcefile, it shows me
    sar=300:400
    dar=1:1

    thanks

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