public static BitmapImage Capture(
MediaPlayer player,
double seconds,
double maxWidth = 640,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi
)
{
if (player is null)
{
return(null);
}
// 指定位置へシーク
player = (MediaPlayer)player.CloneCurrentValue();
double volume = player.Volume;
player.Volume = 0;
player.Position = TimeSpan.FromSeconds(seconds);
player.Pause();
// 読み込みが完了するまで待機
waitMediaSetup(player, seconds);
player.Volume = volume;
return(capture(player, maxWidth, filtering, dpi));
}
public static void CaptureOutGifAnimation(
string path,
MediaPlayer player,
double startSeconds = 0,
double waitSeconds = 0.1,
int count = 10,
double maxWidth = 640,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi)
{
if (player is null)
{
return;
}
// 読み込みが完了するまで待機
waitMediaSetup(player);
int width, height;
// リサイズ後のサイズを計算
calcRectSize(player, maxWidth, out width, out height);
double volume = player.Volume;
player.Volume = 0;
var gEnc = new GifBitmapEncoder();
for (int i = 0; i < count; ++i)
{
// 指定位置へシーク
double pos = startSeconds + (double)i * waitSeconds;
player.Position = TimeSpan.FromSeconds(pos);
player.Pause();
// 読み込みが完了するまで待機
waitMediaSetup(player, pos);
var renderTarget = new RenderTargetBitmap(width, height, dpi, dpi, PixelFormats.Pbgra32);
capture(
renderTarget,
player,
width,
height,
filtering,
dpi
);
gEnc.Frames.Add(BitmapFrame.Create(renderTarget));
}
player.Volume = volume;
using (FileStream fs = new FileStream(path, FileMode.Create))
{
gEnc.Save(fs);
}
}
public static void CaptureOutGifAnimation(
string path,
MediaPlayer player,
double waitSeconds = 0.1,
double maxWidth = 640,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi
)
{
if (player is null)
{
return;
}
// 読み込みが完了するまで待機
waitMediaSetup(player);
if (!player.NaturalDuration.HasTimeSpan)
{
return;
}
CaptureOutGifAnimation(
path,
player,
30,
waitSeconds,
(int)(player.NaturalDuration.TimeSpan.TotalSeconds / waitSeconds),
maxWidth,
filtering,
dpi
);
}
public static BitmapImage Captures(
MediaPlayer player,
double waitSeconds = 10,
int maxColumns = 6,
double maxWidth = 320,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi
)
{
if (player is null)
{
return(null);
}
// 読み込みが完了するまで待機
waitMediaSetup(player);
if (!player.NaturalDuration.HasTimeSpan)
{
return(null);
}
return(Captures(
player,
30,
waitSeconds,
(int)(player.NaturalDuration.TimeSpan.TotalSeconds / waitSeconds),
maxColumns,
maxWidth,
filtering,
dpi
));
}
private static void capture(
RenderTargetBitmap renderTarget,
MediaPlayer player,
double width,
double height,
CRGBA3x3FilteringProc filtering = null,
int dpi = DEFAULT_dpi
)
{
capture(renderTarget, player, 0, 0, width, height, filtering, dpi);
}
private static void capture(
RenderTargetBitmap renderTarget,
MediaPlayer player,
double x,
double y,
double width,
double height,
CRGBA3x3FilteringProc filtering = null,
int dpi = DEFAULT_dpi
)
{
if (filtering != null)
{
var tempRenderTarget = new RenderTargetBitmap((int)width, (int)height, dpi, dpi, PixelFormats.Pbgra32);
// 動画の映像をレンダリングする
var visualForVideo = new DrawingVisual();
using (var context = visualForVideo.RenderOpen())
{
context.DrawVideo(player, new System.Windows.Rect(0, 0, width, height));
}
// ビットマップに visualForVideo をレンダリング
tempRenderTarget.Render(visualForVideo);
// フィルタリングを通す
BitmapImage bitmap = RGBA3x3FilteringProc(
tempRenderTarget,
filtering,
(filtering is null) ? true : filtering.useThread,
dpi);
// レンダリングされた動画のイメージを再配置する
var visualForImage = new DrawingVisual();
using (var context = visualForImage.RenderOpen())
{
context.DrawImage(bitmap, new System.Windows.Rect(x, y, width, height));
}
// ビットマップに visualForImage をレンダリング
renderTarget.Render(visualForImage);
}
else
{
// 動画の映像をレンダリングする
var visualForImage = new DrawingVisual();
using (var context = visualForImage.RenderOpen())
{
context.DrawVideo(player, new System.Windows.Rect(x, y, width, height));
}
// ビットマップに visualForImage をレンダリング
renderTarget.Render(visualForImage);
}
}
//------------------------------------------------------------------
private static BitmapImage capture(
MediaPlayer player,
double maxWidth,
CRGBA3x3FilteringProc filtering = null,
int dpi = DEFAULT_dpi
)
{
int width, height;
// リサイズ後のサイズを計算
calcRectSize(player, maxWidth, out width, out height);
var renderTarget = new RenderTargetBitmap(width, height, dpi, dpi, PixelFormats.Pbgra32);
capture(renderTarget, player, width, height, filtering, dpi);
return(Image.ConvertToBitmapImage(renderTarget, Image.ImageType.PNG));
}
public static BitmapImage Capture(
MediaPlayer player,
double maxWidth = 640,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi)
{
double volume = player.Volume;
player.Volume = 0;
player.Pause();
player.Volume = volume;
// 読み込みが完了するまで待機
waitMediaSetup(player);
return(capture(player, maxWidth, filtering, dpi));
}
public static BitmapImage Captures(
MediaPlayer player,
double startSeconds = 0,
double waitSeconds = 10,
int count = 10,
int maxColumns = 6,
double maxWidth = 320,
CRGBA3x3FilteringProc filtering = null,
int dpi = Image.DEFAULT_dpi)
{
if (player is null)
{
return(null);
}
// 読み込みが完了するまで待機
waitMediaSetup(player);
int width, height;
// リサイズ後のサイズを計算
calcRectSize(player, maxWidth, out width, out height);
int widthSize = width * maxColumns;
int heightCount = count / maxColumns;
heightCount = (heightCount == 0) ? 1 : heightCount;
int heightSize = height * heightCount;
var renderTarget = new RenderTargetBitmap(widthSize, heightSize, dpi, dpi, PixelFormats.Pbgra32);
double volume = player.Volume;
player.Volume = 0;
for (int i = 0; i < count; ++i)
{
// 指定位置へシーク
double pos = startSeconds + (double)i * waitSeconds;
player.Position = TimeSpan.FromSeconds(pos);
player.Pause();
// 読み込みが完了するまで待機
waitMediaSetup(player, pos);
capture(
renderTarget,
player,
(i % maxColumns) * width,
(i / maxColumns) * height,
width,
height,
filtering,
dpi
);
}
player.Volume = volume;
return(Image.ConvertToBitmapImage(renderTarget, Image.ImageType.PNG));
}
