public static void tryLoad() throws Exception {
if (loadingException != null) {
throw loadingException;
} else {
try {
Loader.load(com.googlecode.javacv.cpp.avutil.class);
Loader.load(com.googlecode.javacv.cpp.avcodec.class);
Loader.load(com.googlecode.javacv.cpp.avformat.class);
Loader.load(com.googlecode.javacv.cpp.swscale.class);
} catch (Throwable t) {
if (t instanceof Exception) {
throw loadingException = (Exception) t;
} else {
throw loadingException = new Exception("Failed to load " + FFmpegFrameRecorder.class, t);
}
}
}
}
/** normalized to 120*120 PGM files.. */
public void normalize(String sampleImagePath, String trainedOutput) throws Exception {
Loader.load(opencv_objdetect.class);
String srcPath = sampleImagePath;
String destPath = trainedOutput;
File folder = new File(srcPath);
File[] listOfFiles = folder.listFiles();
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles[i].isFile()) {
String files = listOfFiles[i].getName();
generatePGMFromPic(srcPath, files, destPath);
}
}
}
public boolean record(IplImage image, int pixelFormat) throws Exception {
if (video_st == null) {
throw new Exception(
"No video output stream (Is imageWidth > 0 && imageHeight > 0 and has start() been called?)");
}
int ret;
if (image == null) {
/* no more frame to compress. The codec has a latency of a few
frames if using B frames, so we get the last frames by
passing the same picture again */
} else {
int width = image.width();
int height = image.height();
int step = image.widthStep();
BytePointer data = image.imageData();
if (pixelFormat == AV_PIX_FMT_NONE) {
int depth = image.depth();
int channels = image.nChannels();
if ((depth == IPL_DEPTH_8U || depth == IPL_DEPTH_8S) && channels == 3) {
pixelFormat = AV_PIX_FMT_BGR24;
} else if ((depth == IPL_DEPTH_8U || depth == IPL_DEPTH_8S) && channels == 1) {
pixelFormat = AV_PIX_FMT_GRAY8;
} else if ((depth == IPL_DEPTH_16U || depth == IPL_DEPTH_16S) && channels == 1) {
pixelFormat = AV_HAVE_BIGENDIAN() ? AV_PIX_FMT_GRAY16BE : AV_PIX_FMT_GRAY16LE;
} else if ((depth == IPL_DEPTH_8U || depth == IPL_DEPTH_8S) && channels == 4) {
pixelFormat = AV_PIX_FMT_RGBA;
} else if ((depth == IPL_DEPTH_8U || depth == IPL_DEPTH_8S) && channels == 2) {
pixelFormat = AV_PIX_FMT_NV21; // Android's camera capture format
step = width;
} else {
throw new Exception(
"Could not guess pixel format of image: depth=" + depth + ", channels=" + channels);
}
}
if (video_c.pix_fmt() != pixelFormat
|| video_c.width() != width
|| video_c.height() != height) {
/* convert to the codec pixel format if needed */
img_convert_ctx =
sws_getCachedContext(
img_convert_ctx,
width,
height,
pixelFormat,
video_c.width(),
video_c.height(),
video_c.pix_fmt(),
SWS_BILINEAR,
null,
null,
null);
if (img_convert_ctx == null) {
throw new Exception(
"sws_getCachedContext() error: Cannot initialize the conversion context.");
}
avpicture_fill(tmp_picture, data, pixelFormat, width, height);
avpicture_fill(picture, picture_buf, video_c.pix_fmt(), video_c.width(), video_c.height());
tmp_picture.linesize(0, step);
sws_scale(
img_convert_ctx,
new PointerPointer(tmp_picture),
tmp_picture.linesize(),
0,
height,
new PointerPointer(picture),
picture.linesize());
} else {
avpicture_fill(picture, data, pixelFormat, width, height);
picture.linesize(0, step);
}
}
if ((oformat.flags() & AVFMT_RAWPICTURE) != 0) {
if (image == null) {
return false;
}
/* raw video case. The API may change slightly in the future for that? */
av_init_packet(video_pkt);
video_pkt.flags(video_pkt.flags() | AV_PKT_FLAG_KEY);
video_pkt.stream_index(video_st.index());
video_pkt.data(new BytePointer(picture));
video_pkt.size(Loader.sizeof(AVPicture.class));
} else {
/* encode the image */
av_init_packet(video_pkt);
video_pkt.data(video_outbuf);
video_pkt.size(video_outbuf_size);
picture.quality(video_c.global_quality());
if ((ret =
avcodec_encode_video2(
video_c, video_pkt, image == null ? null : picture, got_video_packet))
< 0) {
throw new Exception(
"avcodec_encode_video2() error " + ret + ": Could not encode video packet.");
}
picture.pts(picture.pts() + 1); // magic required by libx264
/* if zero size, it means the image was buffered */
if (got_video_packet[0] != 0) {
if (video_pkt.pts() != AV_NOPTS_VALUE) {
video_pkt.pts(av_rescale_q(video_pkt.pts(), video_c.time_base(), video_st.time_base()));
}
if (video_pkt.dts() != AV_NOPTS_VALUE) {
video_pkt.dts(av_rescale_q(video_pkt.dts(), video_c.time_base(), video_st.time_base()));
}
video_pkt.stream_index(video_st.index());
} else {
return false;
}
}
synchronized (oc) {
/* write the compressed frame in the media file */
if (interleaved && audio_st != null) {
if ((ret = av_interleaved_write_frame(oc, video_pkt)) < 0) {
throw new Exception(
"av_interleaved_write_frame() error "
+ ret
+ " while writing interleaved video frame.");
}
} else {
if ((ret = av_write_frame(oc, video_pkt)) < 0) {
throw new Exception("av_write_frame() error " + ret + " while writing video frame.");
}
}
}
return picture.key_frame() != 0;
}
static {
Loader.load();
}
static {
Loader.load(BulletNative.class);
}
