public VideoConversion createVideo(final Face face) {
final List<PhotoInfo> photoInfos = photoManager.getPhotosForFace(face);
final List<File> photoFiles = Lists.newArrayList();
for (PhotoInfo info : photoInfos) photoFiles.add(info.getPhotoFile());
final File progressFile = new File(getTmpVideoDir(), "progress");
final Observable<File> conversionObservable =
Observable.defer(
new Func0<Observable<File>>() {
@Override
public Observable<File> call() {
// rename photos to img0000.jpg + process photos
Collections.sort(photoFiles);
int idx = 0;
for (File oldFile : photoFiles) {
++idx;
try {
// process image
Bitmap originalImage = BitmapFactory.decodeFile(oldFile.getAbsolutePath());
Bitmap processedImage = photoProcessor.findFaceAndCrop(originalImage);
// store image
final File newFile =
new File(getTmpVideoDir(), "img" + String.format("%03d", idx) + ".jpg");
if (!newFile.createNewFile())
Timber.e("failed to create file " + newFile.getAbsolutePath());
processedImage.compress(
Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(newFile));
} catch (IOException e) {
Timber.d(e, "failed to copy + process file");
return Observable.error(e);
}
}
// create conversion command
final String photoFileNameTemplate =
getTmpVideoDir().getAbsolutePath() + "/img%03d.jpg";
final String videoFileName = VIDEO_DATE_FORMAT.format(new Date()) + ".mp4";
final File videoFile = new File(getExternalFaceVideoDir(face), videoFileName);
final String command =
String.format(
"-progress %s -framerate 1/%d -i %s -c:v libx264 -r %d -pix_fmt yuv420p %s",
progressFile.getAbsolutePath(),
IMAGE_LENGTH_IN_SECONDS,
photoFileNameTemplate,
FRAMERATE,
videoFile.getAbsolutePath());
Timber.d("executing ffmpeg: " + command);
// start command
return Observable.create(
new Observable.OnSubscribe<File>() {
@Override
public void call(final Subscriber<? super File> subscriber) {
try {
fFmpeg.execute(
command,
new FFmpegExecuteResponseHandler() {
@Override
public void onSuccess(String s) {
Timber.d("video conversion success: " + s);
if (subscriber.isUnsubscribed()) return;
subscriber.onNext(videoFile);
subscriber.onCompleted();
}
@Override
public void onProgress(String s) {
Timber.d("video conversion progress: " + s);
}
@Override
public void onFailure(String s) {
Timber.d("video conversion error: " + s);
subscriber.onError(new IllegalStateException(s));
}
@Override
public void onStart() {
Timber.d("video conversion started");
}
@Override
public void onFinish() {
Timber.d("video conversion finished");
}
});
} catch (FFmpegCommandAlreadyRunningException e) {
Timber.e(e, "failed to start video conversion");
if (subscriber.isUnsubscribed()) return;
subscriber.onError(e);
}
}
});
}
})
.finallyDo(
new Action0() {
@Override
public void call() {
// cleanup
ioUtils.delete(getTmpVideoDir());
}
});
return new VideoConversion(progressFile, photoFiles.size(), conversionObservable);
}
