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• How to setup FFmpegMediaMetadataRetriever to a project with another native library

  20 avril 2016, par kishidp

  So I have a project that uses a native library that only supports arm.

  I want to use FFmpegMediaMetadataRetriever for the metadata retriever, I added the dependency on build.gradle file. However, when I tried to run the application, the native library I’m using suddenly doesn’t work anymore.

  There was an error that says "UnsatisfiedLinkError", I assume the library was not loaded. I also assume that it has something to do with the FFmpegMediaMetadataRetriever having support to other CPU (x86, mips, etc.)

  I saw an option to use individual architecture, I added the arm aar as module to my project (I remove the FFmpegMediaMetadataRetriever dependency), I was able to run the app, but I don’t know what to do after that. Any help ?

• Time-weighting frames of an animation using FFMPEG [duplicate]

  12 mars 2020, par Rohan S Byrne

  I’m using ’ffmpeg’ to make an mp4 out of hundreds of individual frames, which are timeslices from an experiment I’ve run. My problem is that the time sampling is not regular. I would like to somehow ’weight’ the frames according to their time index so that the framerate is fast when the sampling rate was fast and slow when the sampling rate was slow.

  I know how to do this sort of operation when taking, for instance, a time average using numpy arrays. I have no idea how to do it with ffmpeg.

  Any tips ?

• Having issues with exporting video in FFMPEG [closed]

  3 avril 2024, par Jake

  I am developing an application that uses FFMPEG to take numerous videos and concatenate them into one file. The user has the ability to flip an individual video if they would like. From Landscape to portrait. The application works as planned and it produces one single file, with the orientation however the user set them.

  


  The problem is, when I take that file that FFMPEG generated and tray to convert or copy it using FFMPEG. It will create a video file of all of the video prior to the segment where the orientation has been flipped. The flipped video as well as all of the other videos after it, will not be in the video.

  


  Below are the parameters to export each individual video.

  


  parameters = "-y -i " + '"' + frames[0].VideoPath + '"' + " -filter_complex " + '"' + @"[0:v]trim=" + frames[0].TimeCode.TotalSeconds + @":" + frames[1].TimeCode.TotalSeconds +
            @", setpts=PTS-STARTPTS[trimedv0];[trimedv0]yadif," + orientation + @"setsar=1/1, eq=contrast=1:brightness=" + video.Brightness + @", drawtext=text=\'%{pts\:localtime\:" + ToUnixTimestamp(frames[0].FrameTime) +
            @"\:'" + CurrentDisplayDateFormat.DateOutputFormat + @"'}\'" + @":fontfile =\'Fonts/" + font.FirstOrDefault() + @"\':fontcolor=" + fontColor + ":x=" + DATEXOFF +
            ":y=" + DATEYOFF + " -th:fontsize=" + tempFont +
            @":box=1:boxcolor=" + boxColor + @"@" + opacity + @", drawtext=text=\'%{pts\:localtime\:" + ToUnixTimestamp(frames[0].FrameTime) + @"\:'" + CurrentDisplayDateFormat.TimeOutputFormat + @"'}\'" + @":fontfile =\'Fonts/" + font.FirstOrDefault() + @"\':fontcolor=" + fontColor +
            ":x=" + TIMEXOFF + ":y=" + TIMEYOFF +
            " -th:fontsize=" + tempFont + @":box=1:boxcolor=" + boxColor + @"@" + opacity + ", " + fadeString + " -sn " + mapVar + " -progress - -nostats -an -c:v libx264 -b:v " + video.BitRate + " -preset ultrafast -profile:v baseline -level 3.0 " +
            @"-pix_fmt yuv420p -f mpegts " + vidPath + @"\v" + outputFile.ToString() + ".MP4";


  


  Below are the parameters to concatenate all of the videos :

  


  string parameters = "-y -probesize 100M -analyzeduration 100M -i concat:" + '"' + concatString + '"' + @" -c:v copy " + '"' + ExportOptions.CompleteDestinationPath + '"';


  


  Any ideas of what is going on and hopefully a solution ?