在 Android 上將 PowerPoint 簡報轉換為影片
簡介
透過將 PowerPoint 簡報轉換為影片,您可獲得
- 提升可近性: 所有裝置(不論平台)預設皆內建影片播放器,相較於需要開啟簡報的應用程式,使用者更容易開啟或播放影片。
- 更廣的受眾: 透過影片,您可觸及大量觀眾,並向他們傳遞在簡報中可能顯得冗長的資訊。大多數調查與統計顯示,人們觀看與消費影片的比例高於其他內容形式,且普遍偏好此類內容。
Aspose.Slides 中的 PowerPoint 轉影片轉換
Aspose.Slides 支援簡報轉影片的轉換。
- 使用 Aspose.Slides 產生一組畫格(取自簡報投影片),其對應特定的 FPS(每秒畫格數)。
- 使用第三方工具如 ffmpeg(for java)根據這些畫格建立影片。
將 PowerPoint 轉為影片
- 將以下內容加入您的 POM 檔案:
<dependency>
<groupId>net.bramp.ffmpeg</groupId>
<artifactId>ffmpeg</artifactId>
<version>0.7.0</version>
</dependency>
-
在此下載 ffmpeghere。
-
執行 PowerPoint 轉影片的 Java 程式碼。
以下 Java 程式碼示範如何將包含圖形與兩個動畫效果的簡報轉換為影片:
Presentation presentation = new Presentation();
try {
// 新增一個笑臉形狀,然後為其設定動畫
IAutoShape smile = presentation.getSlides().get_Item(0).getShapes().addAutoShape(ShapeType.SmileyFace, 110, 20, 500, 500);
ISequence mainSequence = presentation.getSlides().get_Item(0).getTimeline().getMainSequence();
IEffect effectIn = mainSequence.addEffect(smile, EffectType.Fly, EffectSubtype.TopLeft, EffectTriggerType.AfterPrevious);
IEffect effectOut = mainSequence.addEffect(smile, EffectType.Fly, EffectSubtype.BottomRight, EffectTriggerType.AfterPrevious);
effectIn.getTiming().setDuration(2f);
effectOut.setPresetClassType(EffectPresetClassType.Exit);
final int fps = 33;
ArrayList<String> frames = new ArrayList<String>();
PresentationAnimationsGenerator animationsGenerator = new PresentationAnimationsGenerator(presentation);
try
{
PresentationPlayer player = new PresentationPlayer(animationsGenerator, fps);
try {
player.setFrameTick((sender, arguments) ->
{
try {
String frame = String.format("frame_%04d.png", sender.getFrameIndex());
arguments.getFrame().save(frame, ImageFormat.Png);
frames.add(frame);
} catch (IOException e) {
throw new RuntimeException(e);
}
});
animationsGenerator.run(presentation.getSlides());
} finally {
if (player != null) player.dispose();
}
} finally {
if (animationsGenerator != null) animationsGenerator.dispose();
}
// 設定 ffmpeg 二進位檔所在的資料夾。請參閱此頁面: https://github.com/rosenbjerg/FFMpegCore#installation
FFmpeg ffmpeg = new FFmpeg("path/to/ffmpeg");
FFprobe ffprobe = new FFprobe("path/to/ffprobe");
FFmpegBuilder builder = new FFmpegBuilder()
.addExtraArgs("-start_number", "1")
.setInput("frame_%04d.png")
.addOutput("output.avi")
.setVideoFrameRate(FFmpeg.FPS_24)
.setFormat("avi")
.done();
FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);
executor.createJob(builder).run();
} catch (IOException e) {
e.printStackTrace();
}
影片效果
您可以對投影片上的物件套用動畫,並在投影片之間使用轉場效果。
動畫與轉場讓投影片放映更具吸引力與趣味性——對影片同樣適用。讓我們為前述簡報的程式碼加入另一張投影片與轉場:
// 新增一個笑臉形狀並為其設定動畫
// ...
// 新增一個投影片並設定動畫轉場
ISlide newSlide = presentation.getSlides().addEmptySlide(presentation.getSlides().get_Item(0).getLayoutSlide());
newSlide.getBackground().setType(BackgroundType.OwnBackground);
newSlide.getBackground().getFillFormat().setFillType(FillType.Solid);
newSlide.getBackground().getFillFormat().getSolidFillColor().setColor(Color.MAGENTA);
newSlide.getSlideShowTransition().setType(TransitionType.Push);
Aspose.Slides 亦支援文字動畫。此範例對物件上的段落進行動畫,使其依序出現(延遲設為一秒):
Presentation presentation = new Presentation();
try {
// 新增文字和動畫
IAutoShape autoShape = presentation.getSlides().get_Item(0).getShapes().addAutoShape(ShapeType.Rectangle, 210, 120, 300, 300);
Paragraph para1 = new Paragraph();
para1.getPortions().add(new Portion("Aspose Slides for Java"));
Paragraph para2 = new Paragraph();
para2.getPortions().add(new Portion("convert PowerPoint Presentation with text to video"));
Paragraph para3 = new Paragraph();
para3.getPortions().add(new Portion("paragraph by paragraph"));
IParagraphCollection paragraphCollection = autoShape.getTextFrame().getParagraphs();
paragraphCollection.add(para1);
paragraphCollection.add(para2);
paragraphCollection.add(para3);
paragraphCollection.add(new Paragraph());
ISequence mainSequence = presentation.getSlides().get_Item(0).getTimeline().getMainSequence();
IEffect effect1 = mainSequence.addEffect(para1, EffectType.Appear, EffectSubtype.None, EffectTriggerType.AfterPrevious);
IEffect effect2 = mainSequence.addEffect(para2, EffectType.Appear, EffectSubtype.None, EffectTriggerType.AfterPrevious);
IEffect effect3 = mainSequence.addEffect(para3, EffectType.Appear, EffectSubtype.None, EffectTriggerType.AfterPrevious);
IEffect effect4 = mainSequence.addEffect(para3, EffectType.Appear, EffectSubtype.None, EffectTriggerType.AfterPrevious);
effect1.getTiming().setTriggerDelayTime(1f);
effect2.getTiming().setTriggerDelayTime(1f);
effect3.getTiming().setTriggerDelayTime(1f);
effect4.getTiming().setTriggerDelayTime(1f);
final int fps = 33;
ArrayList<String> frames = new ArrayList<String>();
PresentationAnimationsGenerator animationsGenerator = new PresentationAnimationsGenerator(presentation);
try
{
PresentationPlayer player = new PresentationPlayer(animationsGenerator, fps);
try {
player.setFrameTick((sender, arguments) ->
{
try {
String frame = String.format("frame_%04d.png", sender.getFrameIndex());
arguments.getFrame().save(frame, ImageFormat.Png);
frames.add(frame);
} catch (IOException e) {
throw new RuntimeException(e);
}
});
animationsGenerator.run(presentation.getSlides());
} finally {
if (player != null) player.dispose();
}
} finally {
if (animationsGenerator != null) animationsGenerator.dispose();
}
// 設定 ffmpeg 二進位檔資料夾。請參閱此頁面: https://github.com/rosenbjerg/FFMpegCore#installation
FFmpeg ffmpeg = new FFmpeg("path/to/ffmpeg");
FFprobe ffprobe = new FFprobe("path/to/ffprobe");
FFmpegBuilder builder = new FFmpegBuilder()
.addExtraArgs("-start_number", "1")
.setInput("frame_%04d.png")
.addOutput("output.avi")
.setVideoFrameRate(FFmpeg.FPS_24)
.setFormat("avi")
.done();
FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);
executor.createJob(builder).run();
} catch (IOException e) {
e.printStackTrace();
}
影片轉換類別
為了讓您執行 PowerPoint 轉影片的任務,Aspose.Slides 提供 PresentationAnimationsGenerator 與 PresentationPlayer 類別。
PresentationAnimationsGenerator 允許您透過建構函式設定稍後將建立之影片的畫格大小。若傳入簡報實例,將使用 Presentation.SlideSize,並產生供 PresentationPlayer 使用的動畫。
產生動畫時,會為每個後續動畫產生 NewAnimation 事件,該事件帶有 IPresentationAnimationPlayer 參數。此類別代表單一動畫的播放器。
使用 IPresentationAnimationPlayer 時,會使用 Duration(動畫的完整持續時間)屬性與 SetTimePosition 方法。每個動畫位置設定於 0 到 duration 的範圍內,然後 GetFrame 方法會回傳對應於該時刻動畫狀態的 BufferedImage:
Presentation presentation = new Presentation();
try {
// 新增一個笑臉形狀並為其設定動畫
IAutoShape smile = presentation.getSlides().get_Item(0).getShapes().addAutoShape(ShapeType.SmileyFace, 110, 20, 500, 500);
ISequence mainSequence = presentation.getSlides().get_Item(0).getTimeline().getMainSequence();
IEffect effectIn = mainSequence.addEffect(smile, EffectType.Fly, EffectSubtype.TopLeft, EffectTriggerType.AfterPrevious);
IEffect effectOut = mainSequence.addEffect(smile, EffectType.Fly, EffectSubtype.BottomRight, EffectTriggerType.AfterPrevious);
effectIn.getTiming().setDuration(2f);
effectOut.setPresetClassType(EffectPresetClassType.Exit);
PresentationAnimationsGenerator animationsGenerator = new PresentationAnimationsGenerator(presentation);
try {
animationsGenerator.setNewAnimation(animationPlayer ->
{
System.out.println(String.format("Animation total duration: %f", animationPlayer.getDuration()));
animationPlayer.setTimePosition(0); // 初始動畫狀態
try {
// 初始動畫狀態之位圖
animationPlayer.getFrame().save("firstFrame.png", ImageFormat.Png);
} catch (IOException e) {
throw new RuntimeException(e);
}
animationPlayer.setTimePosition(animationPlayer.getDuration()); // 動畫的最終狀態
try {
// 動畫的最後一幀
animationPlayer.getFrame().save("lastFrame.png", ImageFormat.Png);
} catch (IOException e) {
throw new RuntimeException(e);
}
});
} finally {
if (animationsGenerator != null) animationsGenerator.dispose();
}
} finally {
if (presentation != null) presentation.dispose();
}
若要讓簡報中的所有動畫一次性播放,使用 PresentationPlayer 類別。此類別在建構函式中接受一個 PresentationAnimationsGenerator 實例與特效的 FPS,然後對所有動畫呼叫 FrameTick 事件以啟動播放:
Presentation presentation = new Presentation("animated.pptx");
try {
PresentationAnimationsGenerator animationsGenerator = new PresentationAnimationsGenerator(presentation);
try {
PresentationPlayer player = new PresentationPlayer(animationsGenerator, 33);
try {
player.setFrameTick((sender, arguments) ->
{
try {
arguments.getFrame().save("frame_" + sender.getFrameIndex() + ".png", ImageFormat.Png);
} catch (IOException e) {
throw new RuntimeException(e);
}
});
animationsGenerator.run(presentation.getSlides());
} finally {
if (player != null) player.dispose();
}
} finally {
if (animationsGenerator != null) animationsGenerator.dispose();
}
} finally {
if (presentation != null) presentation.dispose();
}
接著,將產生的畫格編譯即可製作影片。請參閱Convert PowerPoint to Video 章节。
支援的動畫與效果
Entrance:
| 動畫類型 | Aspose.Slides | PowerPoint |
|---|---|---|
| Appear | ![]() |
![]() |
| Fade | ![]() |
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| Fly In | ![]() |
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| Float In | ![]() |
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| Split | ![]() |
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| Wipe | ![]() |
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| Shape | ![]() |
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| Wheel | ![]() |
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| Random Bars | ![]() |
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| Grow & Turn | ![]() |
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| Zoom | ![]() |
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| Swivel | ![]() |
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| Bounce | ![]() |
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Emphasis:
| 動畫類型 | Aspose.Slides | PowerPoint |
|---|---|---|
| Pulse | ![]() |
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| Color Pulse | ![]() |
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| Teeter | ![]() |
![]() |
| Spin | ![]() |
![]() |
| Grow/Shrink | ![]() |
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| Desaturate | ![]() |
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| Darken | ![]() |
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| Lighten | ![]() |
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| Transparency | ![]() |
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| Object Color | ![]() |
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| Complementary Color | ![]() |
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| Line Color | ![]() |
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| Fill Color | ![]() |
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Exit:
| 動畫類型 | Aspose.Slides | PowerPoint |
|---|---|---|
| Disappear | ![]() |
![]() |
| Fade | ![]() |
![]() |
| Fly Out | ![]() |
![]() |
| Float Out | ![]() |
![]() |
| Split | ![]() |
![]() |
| Wipe | ![]() |
![]() |
| Shape | ![]() |
![]() |
| Random Bars | ![]() |
![]() |
| Shrink & Turn | ![]() |
![]() |
| Zoom | ![]() |
![]() |
| Swivel | ![]() |
![]() |
| Bounce | ![]() |
![]() |
Motion Paths:
| 動畫類型 | Aspose.Slides | PowerPoint |
|---|---|---|
| Lines | ![]() |
![]() |
| Arcs | ![]() |
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| Turns | ![]() |
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| Shapes | ![]() |
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| Loops | ![]() |
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| Custom Path | ![]() |
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常見問題
是否可以轉換受密碼保護的簡報?
是的,Aspose.Slides 支援處理受密碼保護的簡報。在處理此類檔案時,您需要提供正確的密碼,才能讓程式庫存取簡報內容。
Aspose.Slides 是否支援在雲端解決方案中使用?
是的,Aspose.Slides 可整合至雲端應用與服務。此程式庫設計為在伺服器環境中運行,確保批次檔案處理的高效能與可擴充性。
在轉換過程中,簡報的大小是否有限制?
Aspose.Slides 能處理幾乎任何大小的簡報。然而,若處理極大檔案,可能需要額外的系統資源,且建議適度最佳化簡報以提升效能。

