38 lines
1.4 KiB
Java
38 lines
1.4 KiB
Java
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package org.jcodec.movtool;
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import java.io.File;
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import org.jcodec.containers.mp4.boxes.Box;
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import org.jcodec.containers.mp4.boxes.MediaHeaderBox;
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import org.jcodec.containers.mp4.boxes.MovieBox;
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import org.jcodec.containers.mp4.boxes.MovieFragmentBox;
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import org.jcodec.containers.mp4.boxes.NodeBox;
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import org.jcodec.containers.mp4.boxes.TrakBox;
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public class ChangeTimescale {
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public static void main1(String[] args) throws Exception {
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if (args.length < 2) {
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System.out.println("Syntax: chts <movie> <timescale>");
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System.exit(-1);
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}
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final int ts = Integer.parseInt(args[1]);
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if (ts < 600) {
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System.out.println("Could not set timescale < 600");
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System.exit(-1);
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}
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new InplaceMP4Editor().modify(new File(args[0]), new MP4Edit() {
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public void apply(MovieBox mov) {
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TrakBox vt = mov.getVideoTrack();
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MediaHeaderBox mdhd = NodeBox.<MediaHeaderBox>findFirstPath(vt, MediaHeaderBox.class, Box.path("mdia.mdhd"));
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int oldTs = mdhd.getTimescale();
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if (oldTs > ts)
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throw new RuntimeException("Old timescale (" + oldTs + ") is greater then new timescale (" + ts + "), not touching.");
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vt.fixMediaTimescale(ts);
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mov.fixTimescale(ts);
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}
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public void applyToFragment(MovieBox mov, MovieFragmentBox[] fragmentBox) {
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throw new RuntimeException("Unsupported");
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}
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});
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}
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}
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