Help : How to get resolution? about mp4parser HOT 4 CLOSED

public static void main(String[] args) throws IOException {
    IsoFile isoFile = new IsoFile(args[0]);
    List<TrackHeaderBox> tkhds = Path.getPaths(isoFile, "/moov/trak/tkhd");
    for (TrackHeaderBox tkhd : tkhds) {
        System.err.println(tkhd.getHeight() + "x" + tkhd.getWidth());
    }
}

from mp4parser.

@sannies : Yes, but you declaredgetWidth()with

public class TrackHeaderBox extends AbstractFullBox {

    public static final String TYPE = "tkhd";

    private double width;
    public double getWidth() {
        return width;
    }

I'm trying to write a solve this problem. So I need to understand how an implementation work.

from mp4parser.

I think you need to dig a bit deeper here. The actual value is parsed from an input file. Have a look at the _parseDetails method. Unfortunately an MP4 container is a bit more complex than let's say a jpeg or gif file and the track header is not always at the same place/offset. The tkhd (TrackHeaderBox) contains width and height as the muxer (the software that wraps raw h264 streams in mp4) has read it from the raw h264 stream. The h264 stream itself has the width and height in its Sequence Parameter Set.
You might want to have a look at the PrintStructure example as it parses through a file's structure without too much overhead. It should be easily adoptable to read from a http based stream. When you find the tkhd box you can then extract the width/height by hand (check _parseDetails of the TrackHeaderBox class)

from mp4parser.

@sannies : More details here.

from mp4parser.