I cant import mp4 video into imageJ

Hello, I downloaded Fiji to analyse the movement of small metal ball on water. But when I try to import the video (in MP4 format), the program won’t open it. Can anyone please tell me how do I import the video? Thanks

me too. tried installing FFMPEG plugin but it throws error (see below)

tried installing MovieLoader but the instructions are not clear how to install

(Fiji Is Just) ImageJ 2.1.0/1.53c; Java 1.8.0_66 [64-bit]; Mac OS X 10.13.6; 85MB of 9835MB (<1%)
java.lang.AbstractMethodError: com.sun.jna.Structure.getFieldOrder()Ljava/util/List;
	at com.sun.jna.Structure.fieldOrder(Structure.java:952)
	at com.sun.jna.Structure.getFields(Structure.java:1006)
	at com.sun.jna.Structure.deriveLayout(Structure.java:1172)
	at com.sun.jna.Structure.calculateSize(Structure.java:1097)
	at com.sun.jna.Structure.calculateSize(Structure.java:1049)
	at com.sun.jna.Structure.allocateMemory(Structure.java:403)
	at com.sun.jna.Structure.<init>(Structure.java:194)
	at com.sun.jna.Structure.<init>(Structure.java:182)
	at com.sun.jna.Structure.<init>(Structure.java:169)
	at com.sun.jna.Structure.<init>(Structure.java:161)
	at fiji.ffmpeg.AVCODEC$AVPacket.<init>(AVCODEC.java:652)
	at fiji.ffmpeg.IO.<init>(IO.java:43)
	at fiji.ffmpeg.IO.<init>(IO.java:53)
	at fiji.ffmpeg.Importer.run(Importer.java:44)
	at ij.IJ.runUserPlugIn(IJ.java:235)
	at ij.IJ.runPlugIn(IJ.java:198)
	at ij.Executer.runCommand(Executer.java:150)
	at ij.Executer.run(Executer.java:68)
	at java.lang.Thread.run(Thread.java:745)


Basically, my plugin also uses ffmpeg, so the files that can be read depend on ffmpeg.
However, when I load the file using Fiji > Files > Import > Movie (ffmpeg), it seems that the last one in my movie file is not loaded.
Of course, when I use MovieLoader, all the files are loaded.
However, when I first load the file, I get some kind of error. (This does not happen with ImageJ).
Anyway, please give it a try.
To install, simply put the jar file into the plugins directory.
*If it doesn’t work, you can think about JavaCV.