private static void saveSlices(List<MovieBox> slices, List<String> names, File parentFile)
throws IOException {
for (int i = 0; i < slices.size(); i++) {
if (names.get(i) == null) continue;
SeekableByteChannel out = null;
try {
out = writableChannel(new File(parentFile, names.get(i)));
MP4Util.writeMovie(out, slices.get(i));
} finally {
NIOUtils.closeQuietly(out);
}
}
}
public void flatternChannel(MovieBox movie, SeekableByteChannel out) throws IOException {
if (!movie.isPureRefMovie(movie))
throw new IllegalArgumentException("movie should be reference");
ByteBuffer buf = ByteBuffer.allocate(16 * 1024 * 1024);
FileTypeBox ftyp =
FileTypeBox.createFileTypeBox("qt ", 0x20050300, Arrays.asList(new String[] {"qt "}));
ftyp.write(buf);
long movieOff = buf.position();
movie.write(buf);
int extraSpace = calcSpaceReq(movie);
Header.createHeader("free", 8 + extraSpace).write(buf);
NIOUtils.skip(buf, extraSpace);
long mdatOff = buf.position();
Header.createHeader("mdat", 0x100000001L).write(buf);
buf.flip();
out.write(buf);
SeekableByteChannel[][] inputs = getInputs(movie);
TrakBox[] tracks = movie.getTracks();
ChunkReader[] readers = new ChunkReader[tracks.length];
ChunkWriter[] writers = new ChunkWriter[tracks.length];
Chunk[] head = new Chunk[tracks.length];
int totalChunks = 0, writtenChunks = 0, lastProgress = 0;
long[] off = new long[tracks.length];
for (int i = 0; i < tracks.length; i++) {
readers[i] = new ChunkReader(tracks[i]);
totalChunks += readers[i].size();
writers[i] = new ChunkWriter(tracks[i], inputs[i], out);
head[i] = readers[i].next();
if (tracks[i].isVideo()) off[i] = 2 * movie.getTimescale();
}
while (true) {
int min = -1;
for (int i = 0; i < readers.length; i++) {
if (head[i] == null) continue;
if (min == -1) min = i;
else {
long iTv = movie.rescale(head[i].getStartTv(), tracks[i].getTimescale()) + off[i];
long minTv = movie.rescale(head[min].getStartTv(), tracks[min].getTimescale()) + off[min];
if (iTv < minTv) min = i;
}
}
if (min == -1) break;
writers[min].write(head[min]);
head[min] = readers[min].next();
writtenChunks++;
lastProgress = calcProgress(totalChunks, writtenChunks, lastProgress);
}
long mdatSize = out.position() - mdatOff;
for (int i = 0; i < tracks.length; i++) {
writers[i].apply();
}
out.setPosition(movieOff);
MP4Util.writeMovie(out, movie);
long extra = mdatOff - out.position();
if (extra < 0) throw new RuntimeException("Not enough space to write the header");
out.write(
(ByteBuffer)
ByteBuffer.allocate(8).putInt((int) extra).put(new byte[] {'f', 'r', 'e', 'e'}).flip());
out.setPosition(mdatOff + 8);
out.write(ByteBuffer.allocate(8).putLong(mdatSize));
}
public static void main1(String[] args) throws Exception {
if (args.length < 1) {
System.out.println(
"Syntax: cut [-command arg]...[-command arg] [-self] <movie file>\n"
+ "\tCreates a reference movie out of the file and applies a set of changes specified by the commands to it.");
System.exit(-1);
}
List<Slice> slices = new ArrayList<Slice>();
List<String> sliceNames = new ArrayList<String>();
boolean selfContained = false;
int shift = 0;
while (true) {
if ("-cut".equals(args[shift])) {
String[] pt = StringUtils.splitS(args[shift + 1], ":");
slices.add(new Slice(parseInt(pt[0]), parseInt(pt[1])));
if (pt.length > 2) sliceNames.add(pt[2]);
else sliceNames.add(null);
shift += 2;
} else if ("-self".equals(args[shift])) {
++shift;
selfContained = true;
} else break;
}
File source = new File(args[shift]);
SeekableByteChannel input = null;
SeekableByteChannel out = null;
List<SeekableByteChannel> outs = new ArrayList<SeekableByteChannel>();
try {
input = readableChannel(source);
MovieBox movie = createRefMovie(input, "file://" + source.getCanonicalPath());
List<MovieBox> slicesMovs;
if (!selfContained) {
out =
writableChannel(
new File(
source.getParentFile(),
JCodecUtil2.removeExtension(source.getName()) + ".ref.mov"));
slicesMovs = new Cut().cut(movie, slices);
MP4Util.writeMovie(out, movie);
} else {
out =
writableChannel(
new File(
source.getParentFile(),
JCodecUtil2.removeExtension(source.getName()) + ".self.mov"));
slicesMovs = new Cut().cut(movie, slices);
new Strip().strip(movie);
new Flattern().flatternChannel(movie, out);
}
saveSlices(slicesMovs, sliceNames, source.getParentFile());
} finally {
if (input != null) input.close();
if (out != null) out.close();
for (SeekableByteChannel o : outs) {
o.close();
}
}
}
