Tiny Planets Coding

The other day on Google+ I read a post from Ana Andres talking about coding Tiny Planets, and how it was running really slow in Matlab somewhere in the pixel drawing code.

That got me thinking about how I would code it in C#, and Ana had a good blog post showing one way of thinking about how the transformation was happening , one of her goals was to make an animated GIF so people could see the wrap bend happening.

Tiny Planet Code A
Tiny Planet A GIF

Now the this was plenty fast enough, I was getting 2-3 fps on my laptop using only one core, so from a speed perspective moved on.

My first plan was to interpolate between the points (all though that would really slow, and look bad at the outside), but when I showed my co-worker my method, he said I was silly and should just traverse the output space, and find the input pixel that maps, so I did that and got:

Tiny Planet Code C

I then had to put the bend code back in, as that was a special aspect needed for the animation and got:

Tiny Planet D GIF

I then started playing with sub-sampling to make the output less jaggie (F), and then I decided blend in YUV (or YCrCb) colour space, and finally settled on five point YUV average where you have a center of the pixel and the four 1/4 towards the pixel diagonal corners. Givening:

Tiny Planet H GIF

Sorry for GIF being links they are larger than they should be for in-lining..

Now improvement on the process would be to allow scaling and translation of the origin on the polar focus, this might be useful in an interactive UI to allow exploring the space.

Here’s my source code. A to H is the progression, it was fun to learn to make GIFs in C#.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Diagnostics;
using System.Windows.Media.Imaging;
using System.Windows;
using System.IO;

namespace TinyPlanet
{
	class Program
	{
		static void Main(string[] args)
		{
			Bitmap src = new Bitmap(@"C:\temp\tinyplanet-1.png");

			//GifA(src);

			//Bitmap dsta = Bend_A(src, i);
			//dsta.Save(@"C:\temp\tinyplanet-out_A.png");

			//Bitmap dstc = Bend_C(src, 100);
			//dstc.Save(@"C:\temp\tinyplanet-out_C.png");

			//GifD(src);

			//Bitmap dstd = Bend_D(src, 60);
			//dstd.Save(@"C:\temp\tinyplanet-out_D.png");

			//Bitmap dste = Bend_E(src, 60);
			//dste.Save(@"C:\temp\tinyplanet-out_E.png");

			//Bitmap dstf = Bend_F(src, 60);
			//dstf.Save(@"C:\temp\tinyplanet-out_F.png");

			//Bitmap dstg = Bend_G(src, 60);
			//dstg.Save(@"C:\temp\tinyplanet-out_G.png");

			//Bitmap dsth = Bend_H(src, 60);
			//dsth.Save(@"C:\temp\tinyplanet-out_H.png");

			GifH(src);
		}

		static void GifA(Bitmap src)
		{
			GifBitmapEncoder gEnc = new GifBitmapEncoder();

			for (int i = 0; i <= 100; i++)
			{
				Bitmap dst = Bend_A(src, i);
				Debug.WriteLine(string.Format("frame {0}", i));

				var frame = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
						dst.GetHbitmap(),
						IntPtr.Zero,
						Int32Rect.Empty,
						BitmapSizeOptions.FromEmptyOptions());
				gEnc.Frames.Add(BitmapFrame.Create(frame));
			}

			gEnc.Save(new FileStream(@"C:\temp\tinyplanet-out_A.gif", FileMode.Create));
		}

		static void GifD(Bitmap src)
		{
			GifBitmapEncoder gEnc = new GifBitmapEncoder();

			for (int i = 0; i <= 100; i++)
			{
				Bitmap dst = Bend_D(src, i);
				Debug.WriteLine(string.Format("frame {0}", i));

				var frame = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
						dst.GetHbitmap(),
						IntPtr.Zero,
						Int32Rect.Empty,
						BitmapSizeOptions.FromEmptyOptions());
				gEnc.Frames.Add(BitmapFrame.Create(frame));
			}

			gEnc.Save(new FileStream(@"C:\temp\tinyplanet-out_D.gif", FileMode.Create));
		}

		static void GifH(Bitmap src)
		{
			GifBitmapEncoder gEnc = new GifBitmapEncoder();

			for (int i = 0; i <= 100; i++)
			{
				Bitmap dst = Bend_H(src, i);
				Debug.WriteLine(string.Format("frame {0}", i));

				var frame = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
						dst.GetHbitmap(),
						IntPtr.Zero,
						Int32Rect.Empty,
						BitmapSizeOptions.FromEmptyOptions());
				gEnc.Frames.Add(BitmapFrame.Create(frame));
			}

			gEnc.Save(new FileStream(@"C:\temp\tinyplanet-out_H.gif", FileMode.Create));
		}

		static Bitmap Bend_A(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;
		
			double bend = bend_i / 100.0; // turn to percentage;

			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);


			for (int x = 0; x < src_half_width; x++)
			{
				if (x >= bend_x)
				{
					// do polar
					int bx = x - bend_x;

					double rad = ((bx / bent_pixels) * final_ang) + (Math.PI / 2.0);
					//Debug.WriteLine(string.Format("bend % {0} ang {1}", bx / bent_pixels, rad * (180 / Math.PI)));
					double sin = Math.Sin(rad);
					double cos = Math.Cos(rad);


					for (int y = 0; y < src.Height; y++)
					{
						dst.SetPixel(dst_origin_x - bend_x + (int)(cos * y), dst_origin_y - (int)(sin * y), src.GetPixel(src_half_width - x, src.Height - y - 1));
						dst.SetPixel(dst_origin_x + bend_x - (int)(cos * y), dst_origin_y - (int)(sin * y), src.GetPixel(src_half_width + x, src.Height - y - 1));
					}
				}
				else
				{
					// do rectilinear
					for (int y = 0; y < src.Height; y++)
					{
						// left side
						dst.SetPixel(dst_origin_x - x, dst_origin_y - y, src.GetPixel(src_half_width - x, src.Height - y - 1));

						// right side
						dst.SetPixel(dst_origin_x + x, dst_origin_y - y, src.GetPixel(src_half_width + x, src.Height - y - 1));
					}
				}
			}

			return dst;
		}

		static Bitmap Bend_C(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bent_pixels = src_half_width;
			double final_ang = Math.PI;


			Bitmap dst = new Bitmap(dst_width, dst_height);
			for (int x = 0; x < dst_width; x++)
			{
				for (int y = 0; y < dst_height; y++)
				{
					// map from output to input
					int dx = x - dst_origin_x;
					int dy = y - dst_origin_y;

					double r = Math.Sqrt((dx * dx) + (dy * dy));
					double q = Math.Atan2(dy, dx);

					double pic_ang = q + (Math.PI / 2.0);
					double mod_ang = ((pic_ang + Math.PI) % (Math.PI * 2.0)) - Math.PI;

					int dev_x = (int)((mod_ang / final_ang) * bent_pixels);
					int dev_y = (int)r;

					//Debug.WriteLine(string.Format("x {0} y {1} dx {2} dy{3}, r {4}, q {5}, dev_x {6}, pic_ang {7}", x, y, dx, dy, r, q, dev_x, pic_ang));

					if (Math.Abs(dev_x) <= src_half_width &&
						dev_y < src.Height)
					{
						dst.SetPixel(x, y, src.GetPixel(dev_x + src_half_width, src.Height - dev_y - 1));
					}
				}
			}

			return dst;
		}

		static Bitmap Bend_D(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bend = bend_i / 100.0; // turn to percentage;


			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);

			int bend_start_x = dst_origin_x - bend_x;
			int bend_end_x = dst_origin_x + bend_x;

			for (int x = 0; x < dst_width; x++)
			{
				int fix_x = (x < dst_origin_x ? bend_x : -bend_x);
				for (int y = 0; y < dst_height; y++)
				{
					if (x > bend_start_x &&
						x < bend_end_x)
					{
						// rectanliner 
						int ox = (x - bend_start_x) + (src_half_width - bend_x);

						if (y < src.Height)
						{
							dst.SetPixel(x, y, src.GetPixel(ox, y));
						}
					}
					else
					{
						// map from output to input
						int dx = x - dst_origin_x + fix_x;
						int dy = y - dst_origin_y;

						double r = Math.Sqrt((dx * dx) + (dy * dy));
						double q = Math.Atan2(dy, dx);

						double pic_ang = q + (Math.PI / 2.0);
						double mod_ang = ((pic_ang + Math.PI) % (Math.PI * 2.0)) - Math.PI;

						if (Math.Abs(mod_ang) <= final_ang)
						{
							int dev_x = (int)((mod_ang / final_ang) * bent_pixels) - fix_x + src_half_width;
							int dev_y = (int)r;

							//Debug.WriteLine(string.Format("x {0} y {1} dx {2} dy{3}, r {4}, q {5}, dev_x {6}, pic_ang {7}", x, y, dx, dy, r, q, dev_x, pic_ang));

							if (dev_x < src.Width && dev_x >= 0 && 
								dev_y < src.Height)
							{
								dst.SetPixel(x, y, src.GetPixel(dev_x, src.Height - dev_y - 1));
							}
						}
					}
				}
			}

			return dst;
		}

		static Bitmap Bend_E(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bend = bend_i / 100.0; // turn to percentage;


			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);

			int bend_start_x = dst_origin_x - bend_x;
			int bend_end_x = dst_origin_x + bend_x;

			for (int x = 0; x < dst_width; x++)
			{
				int fix_x = (x < dst_origin_x ? bend_x : -bend_x);
				int ox = (x - bend_start_x) + (src_half_width - bend_x);

				for (int y = 0; y < dst_height; y++)
				{
					if (x > bend_start_x &&
						x < bend_end_x)
					{
						// rectanliner 
						if (y < src.Height)
						{
							dst.SetPixel(x, y, src.GetPixel(ox, y));
						}
					}
					else
					{
						// map from output to input
						int dx = x - dst_origin_x + fix_x;
						int dy = y - dst_origin_y;

						dst.SetPixel(x, y, Color.FromArgb(ARGBAtPoint(dx, dy, final_ang, ref src, bent_pixels, fix_x)));
					}
				}
			}

			return dst;
		}

		static Bitmap Bend_F(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bend = bend_i / 100.0; // turn to percentage;


			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);

			int bend_start_x = dst_origin_x - bend_x;
			int bend_end_x = dst_origin_x + bend_x;

			for (int x = 0; x < dst_width; x++)
			{
				int fix_x = (x < dst_origin_x ? bend_x : -bend_x);
				int ox = (x - bend_start_x) + (src_half_width - bend_x);

				for (int y = 0; y < dst_height; y++)
				{
					if (x > bend_start_x &&
						x < bend_end_x)
					{
						// rectanliner 
						if (y < src.Height)
						{
							dst.SetPixel(x, y, src.GetPixel(ox, y));
						}
					}
					else
					{
						// map from output to input
						int dx = x - dst_origin_x + fix_x;
						int dy = y - dst_origin_y;

						int p0 = ARGBAtPoint(dx - 0.5, dy - 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p1 = ARGBAtPoint(dx - 0.5, dy + 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p2 = ARGBAtPoint(dx + 0.5, dy - 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p3 = ARGBAtPoint(dx + 0.5, dy + 0.5, final_ang, ref src, bent_pixels, fix_x);

						int R = (((p0 >> 16) & 0xFF) + ((p0 >> 16) & 0xFF) + ((p0 >> 16) & 0xFF) + ((p0 >> 16) & 0xFF)) / 4;
						int G = (((p0 >> 8) & 0xFF) + ((p0 >> 8) & 0xFF) + ((p0 >> 8) & 0xFF) + ((p0 >> 8) & 0xFF)) / 4;
						int B = ((p0 & 0xFF) + (p0 & 0xFF) + (p0 & 0xFF) + (p0 & 0xFF)) / 4;

						dst.SetPixel(x, y, Color.FromArgb(R, G, B));
					}
				}
			}

			return dst;
		}

		static Bitmap Bend_G(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bend = bend_i / 100.0; // turn to percentage;


			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);

			int bend_start_x = dst_origin_x - bend_x;
			int bend_end_x = dst_origin_x + bend_x;

			for (int x = 0; x < dst_width; x++)
			{
				int fix_x = (x < dst_origin_x ? bend_x : -bend_x);
				int ox = (x - bend_start_x) + (src_half_width - bend_x);

				for (int y = 0; y < dst_height; y++)
				{
					if (x > bend_start_x &&
						x < bend_end_x)
					{
						// rectanliner 
						if (y < src.Height)
						{
							dst.SetPixel(x, y, src.GetPixel(ox, y));
						}
					}
					else
					{
						// map from output to input
						int dx = x - dst_origin_x + fix_x;
						int dy = y - dst_origin_y;

						int p0 = ARGBAtPoint(dx - 0.5, dy - 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p1 = ARGBAtPoint(dx - 0.5, dy + 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p2 = ARGBAtPoint(dx + 0.5, dy - 0.5, final_ang, ref src, bent_pixels, fix_x);
						int p3 = ARGBAtPoint(dx + 0.5, dy + 0.5, final_ang, ref src, bent_pixels, fix_x);

						int yy, cr, cb;
						int yt = 0, crt = 0, cbt = 0;
						YCbCrFromRGB(p0, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p1, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p2, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p3, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;

						dst.SetPixel(x, y, Color.FromArgb(ARGBFromYCbCr(yt/4, cbt/4, crt/4)));
					}
				}
			}

			Debug.WriteLine(string.Format("red {0:x4}", Color.Red.ToArgb()));

			return dst;
		}

		static Bitmap Bend_H(Bitmap src, int bend_i)
		{
			int src_half_width = src.Width / 2;
			int dst_width = (src.Height * 2) + src.Width;
			int dst_height = src.Height * 2;
			int dst_origin_x = dst_width / 2;
			int dst_origin_y = dst_height / 2;

			double bend = bend_i / 100.0; // turn to percentage;


			int bend_x = (int)(src_half_width * (1.0 - bend));
			double bent_pixels = src_half_width - bend_x;
			double final_ang_d = 180.0 * bend;
			//Debug.WriteLine(string.Format("final_ang_d {0}", final_ang_d));
			double final_ang = final_ang_d * (Math.PI / 180.0);


			Bitmap dst = new Bitmap(dst_width, dst_height);
			Graphics g = Graphics.FromImage(dst);
			g.Clear(Color.White);
			g.DrawImage(dst, 0, 0, dst.Width, dst.Height);

			int bend_start_x = dst_origin_x - bend_x;
			int bend_end_x = dst_origin_x + bend_x;

			for (int x = 0; x < dst_width; x++)
			{
				int fix_x = (x < dst_origin_x ? bend_x : -bend_x);
				int ox = (x - bend_start_x) + (src_half_width - bend_x);

				for (int y = 0; y < dst_height; y++)
				{
					if (x > bend_start_x &&
						x < bend_end_x)
					{
						// rectanliner 
						if (y < src.Height)
						{
							dst.SetPixel(x, y, src.GetPixel(ox, y));
						}
					}
					else
					{
						// map from output to input
						int dx = x - dst_origin_x + fix_x;
						int dy = y - dst_origin_y;

						int p0 = ARGBAtPoint(dx - 0.25, dy - 0.25, final_ang, ref src, bent_pixels, fix_x);
						int p1 = ARGBAtPoint(dx - 0.25, dy + 0.25, final_ang, ref src, bent_pixels, fix_x);
						int p2 = ARGBAtPoint(dx + 0.25, dy - 0.25, final_ang, ref src, bent_pixels, fix_x);
						int p3 = ARGBAtPoint(dx + 0.25, dy + 0.25, final_ang, ref src, bent_pixels, fix_x);
						int p4 = ARGBAtPoint(dx, dy, final_ang, ref src, bent_pixels, fix_x);

						int yy, cr, cb;
						int yt = 0, crt = 0, cbt = 0;
						YCbCrFromRGB(p0, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p1, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p2, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p3, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;
						YCbCrFromRGB(p4, out yy, out cr, out cb);
						yt += yy; crt += cr; cbt += cb;

						dst.SetPixel(x, y, Color.FromArgb(ARGBFromYCbCr(yt / 5, cbt / 5, crt / 5)));
					}
				}
			}

			Debug.WriteLine(string.Format("red {0:x4}", Color.Red.ToArgb()));

			return dst;
		}

		static void YCbCrFromRGB(int RGB, out int Y, out int Cb, out int Cr)
		{
			int r = (RGB >> 16) & 0xFF;
			int g = (RGB >> 8) & 0xFF;
			int b = RGB & 0xFF;
			Y = (int)(0.299 * r + 0.587 * g + 0.114 * b);
			Cb = (int)(128 - 0.169 * r - 0.331 * g + 0.500 * b);
			Cr = (int)(128 + 0.500 * r - 0.419 * g - 0.081 * b);
		}

		static int ARGBFromYCbCr(int Y, int Cb, int Cr)
		{
			int r = Y + (int)((1.4f * (Cb - 128))+0.5);
			int g = Y + (int)((-0.343f * (Cr - 128) - 0.711f * (Cb - 128))+0.5);
			int b = Y + (int)((1.765f * (Cr - 128)) + 0.5);
			return (int)(0xFF000000 + (r << 16) + (g << 8) + (b));
		}


		static int ARGBAtPoint(double dx, double dy, double final_ang, ref Bitmap src, double bent_pixels, int fix_x)
		{
			double r = Math.Sqrt((dx * dx) + (dy * dy));
			double q = Math.Atan2(dy, dx);

			double pic_ang = q + (Math.PI / 2.0);
			double mod_ang = ((pic_ang + Math.PI) % (Math.PI * 2.0)) - Math.PI;

			if (Math.Abs(mod_ang) <= final_ang)
			{
				int dev_x = (int)((mod_ang / final_ang) * bent_pixels) - fix_x + (src.Width/2);
				int dev_y = (int)r;

				//Debug.WriteLine(string.Format("x {0} y {1} dx {2} dy{3}, r {4}, q {5}, dev_x {6}, pic_ang {7}", x, y, dx, dy, r, q, dev_x, pic_ang));

				if (dev_x < src.Width && dev_x >= 0 &&
					dev_y < src.Height)
				{
					return src.GetPixel(dev_x, src.Height - dev_y - 1).ToArgb();
				}
			}

			return Color.White.ToArgb();
		}
	}
		
}

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Using Premake and GCC then avoid FloatFast

We are porting our MSVC/Win32 applications to Clang/GCC/Linux and have just spent the morning tracing why our unit tests fail.

void BadExampleCode()
{
    double a = NAN;
    ASSERT(!isnan(a));
}

Under MSVC and Clang all good, GCC asserts. We added printf’s and looked at the assembly and the code was hard coded to 0.

Some googling found 2006 posts stating GCC -ffast-math did odd things with isnan, and it’s still a presently reported issue

This came about because we are using Premake, and had the FloatFast flag set, because that’s how our MSVC projects were set, and we don’t want to change those builds, so for now we have tweaked the Premake code for this flag under GCC, as it doesn’t make sense that you would ever want isnan to be hard coded to zero, that’s really not fast maths at all.

We also put a #ifdef for ffast-math to break if this flag is present in the future.

And by we I mean Dave, and I just sat and talking it though with him.

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Google Adsense April First joke

Moons/Planets instead of countries, quite funny to see this morning:

google_adsense_moons

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High Bit-rate recording now solved

After a couple of weeks of hard code tracing Coderat nailed the where/how of the bit rates for Nikon DSLR movies recording are set. The sad thing is the source of the bit rates is just a simple function that had been documented for a couple of years, the completeness of it’s effect was just not understood. Sigh.

But now we have patched in higher bit rates. To that end 34mbps and 54mbps have been tested on a D5100, and I’ve tested 34mbps, 49mbps and 64mbps on my D7000.

There are some D7000 video’s that can be reviewed if that’s your thing 1080 24fps 18mbps (default) 29MB 1080 24fps 30mbps (default) 47MB 1080 24fps 45mbps (default) 60MB

The online patch tool now lets to install these rates, on D5100 and D7000, and only at 1080p, but I’m sure more models/modes will follow as requested.

I had no record problems with 64mbps (really 60mbps as I had no sound being recorded), using both my slow Transcend Class 10 card, or my fast SanDisk Extreme Pro, which I purchased for these very tests back in 2012.

photo

So if you want to test or talk about this come on over to the Nikon Hacker forums.

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iTunes per track Start Stop times

I recently purchased the Rebecca & Fiona – Luminary Ones (Nause Remix) off iTunes Store as I really like the song, and that mix in particular. The song is a 7m 47s DJ friendly mix, thus has 2 minutes of intro and 2 minutes of outro, that are honestly boring.

So I have been day dreaming of making a new cut of the track with those minutes trimmed, so I jumped into iTunes to see the file type to work out what needs to be done to trim the song, and just for the laughs I look at the Options tab of the track, and low and behold, a ‘Start Time’ and ‘Stop Time’.

itunes_start_stop_times

And the settings worked on my PC, so I synced my iPhone, and they work there also. Sorted!

Now I would like a fade out option, as the ending is abrupt, but there is not a nice breakdown to end on, and maybe I will trim the song externally, but 95% of my problem is solved, so most likely I won’t.

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