mirror of
https://github.com/samsonjs/LayerVideoCompositor.git
synced 2026-03-25 09:25:52 +00:00
add layer video compositor example
This commit is contained in:
parent
dd5091fe2a
commit
f716607e17
6 changed files with 289 additions and 9 deletions
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@ -12,6 +12,9 @@
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7B426AC01DDD559D002E94E7 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 7B426ABE1DDD559D002E94E7 /* Main.storyboard */; };
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7B426AC21DDD559D002E94E7 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 7B426AC11DDD559D002E94E7 /* Assets.xcassets */; };
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7B426AC51DDD559D002E94E7 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 7B426AC31DDD559D002E94E7 /* LaunchScreen.storyboard */; };
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7B426ACE1DDD5647002E94E7 /* LayerVideoCompositionInstruction.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7B426ACC1DDD5647002E94E7 /* LayerVideoCompositionInstruction.swift */; };
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7B426ACF1DDD5647002E94E7 /* LayerVideoCompositor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7B426ACD1DDD5647002E94E7 /* LayerVideoCompositor.swift */; };
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7B426AD11DDD5739002E94E7 /* video.mov in Resources */ = {isa = PBXBuildFile; fileRef = 7B426AD01DDD5739002E94E7 /* video.mov */; };
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/* End PBXBuildFile section */
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/* Begin PBXFileReference section */
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@ -22,6 +25,9 @@
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7B426AC11DDD559D002E94E7 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
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7B426AC41DDD559D002E94E7 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
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7B426AC61DDD559D002E94E7 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
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7B426ACC1DDD5647002E94E7 /* LayerVideoCompositionInstruction.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LayerVideoCompositionInstruction.swift; sourceTree = "<group>"; };
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7B426ACD1DDD5647002E94E7 /* LayerVideoCompositor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LayerVideoCompositor.swift; sourceTree = "<group>"; };
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7B426AD01DDD5739002E94E7 /* video.mov */ = {isa = PBXFileReference; lastKnownFileType = video.quicktime; path = video.mov; sourceTree = "<group>"; };
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/* End PBXFileReference section */
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/* Begin PBXFrameworksBuildPhase section */
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@ -54,6 +60,9 @@
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7B426AB91DDD559D002E94E7 /* LayerVideoCompositor */ = {
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isa = PBXGroup;
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children = (
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7B426AD01DDD5739002E94E7 /* video.mov */,
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7B426ACC1DDD5647002E94E7 /* LayerVideoCompositionInstruction.swift */,
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7B426ACD1DDD5647002E94E7 /* LayerVideoCompositor.swift */,
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7B426ABA1DDD559D002E94E7 /* AppDelegate.swift */,
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7B426ABC1DDD559D002E94E7 /* ViewController.swift */,
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7B426ABE1DDD559D002E94E7 /* Main.storyboard */,
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@ -97,6 +106,7 @@
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7B426AB61DDD559D002E94E7 = {
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CreatedOnToolsVersion = 8.1;
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DevelopmentTeam = X45WPY5JFZ;
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LastSwiftMigration = 0810;
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ProvisioningStyle = Automatic;
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};
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};
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@ -124,6 +134,7 @@
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isa = PBXResourcesBuildPhase;
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buildActionMask = 2147483647;
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files = (
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7B426AD11DDD5739002E94E7 /* video.mov in Resources */,
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7B426AC51DDD559D002E94E7 /* LaunchScreen.storyboard in Resources */,
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7B426AC21DDD559D002E94E7 /* Assets.xcassets in Resources */,
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7B426AC01DDD559D002E94E7 /* Main.storyboard in Resources */,
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@ -137,7 +148,9 @@
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isa = PBXSourcesBuildPhase;
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buildActionMask = 2147483647;
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files = (
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7B426ACF1DDD5647002E94E7 /* LayerVideoCompositor.swift in Sources */,
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7B426ABD1DDD559D002E94E7 /* ViewController.swift in Sources */,
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7B426ACE1DDD5647002E94E7 /* LayerVideoCompositionInstruction.swift in Sources */,
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7B426ABB1DDD559D002E94E7 /* AppDelegate.swift in Sources */,
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);
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runOnlyForDeploymentPostprocessing = 0;
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@ -261,11 +274,14 @@
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isa = XCBuildConfiguration;
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buildSettings = {
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ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
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CLANG_ENABLE_MODULES = YES;
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DEVELOPMENT_TEAM = X45WPY5JFZ;
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INFOPLIST_FILE = LayerVideoCompositor/Info.plist;
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IPHONEOS_DEPLOYMENT_TARGET = 9.0;
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LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
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PRODUCT_BUNDLE_IDENTIFIER = ca.gurulogic.LayerVideoCompositor;
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PRODUCT_NAME = "$(TARGET_NAME)";
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SWIFT_OPTIMIZATION_LEVEL = "-Onone";
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SWIFT_VERSION = 3.0;
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};
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name = Debug;
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@ -274,8 +290,10 @@
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isa = XCBuildConfiguration;
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buildSettings = {
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ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
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CLANG_ENABLE_MODULES = YES;
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DEVELOPMENT_TEAM = X45WPY5JFZ;
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INFOPLIST_FILE = LayerVideoCompositor/Info.plist;
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IPHONEOS_DEPLOYMENT_TARGET = 9.0;
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LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
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PRODUCT_BUNDLE_IDENTIFIER = ca.gurulogic.LayerVideoCompositor;
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PRODUCT_NAME = "$(TARGET_NAME)";
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@ -302,6 +320,7 @@
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7B426ACB1DDD559D002E94E7 /* Release */,
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);
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defaultConfigurationIsVisible = 0;
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defaultConfigurationName = Release;
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};
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/* End XCConfigurationList section */
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};
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@ -1,14 +1,17 @@
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11134" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
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<?xml version="1.0" encoding="UTF-8"?>
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<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11542" systemVersion="16B2555" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
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<device id="retina4_7" orientation="portrait">
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<adaptation id="fullscreen"/>
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</device>
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<dependencies>
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<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11106"/>
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<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11524"/>
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<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
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</dependencies>
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<scenes>
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<!--View Controller-->
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<scene sceneID="tne-QT-ifu">
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<objects>
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<viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
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<viewController id="BYZ-38-t0r" customClass="ViewController" customModule="LayerVideoCompositor" customModuleProvider="target" sceneMemberID="viewController">
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<layoutGuides>
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<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
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<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
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@ -16,8 +19,30 @@
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<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
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<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
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<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
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<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
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<subviews>
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<activityIndicatorView opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" hidesWhenStopped="YES" animating="YES" style="whiteLarge" translatesAutoresizingMaskIntoConstraints="NO" id="gMZ-I5-gYe">
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<rect key="frame" x="169" y="315" width="37" height="37"/>
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</activityIndicatorView>
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<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Rendering video" textAlignment="center" lineBreakMode="wordWrap" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="xce-mO-TBx">
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<rect key="frame" x="10" y="286" width="355" height="21"/>
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<fontDescription key="fontDescription" type="system" pointSize="17"/>
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<color key="textColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
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<nil key="highlightedColor"/>
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</label>
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</subviews>
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<color key="backgroundColor" red="0.20000000000000001" green="0.20000000000000001" blue="0.20000000000000001" alpha="0.85090648849999995" colorSpace="calibratedRGB"/>
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<constraints>
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<constraint firstItem="gMZ-I5-gYe" firstAttribute="top" secondItem="xce-mO-TBx" secondAttribute="bottom" constant="8" id="BnQ-UY-9C3"/>
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<constraint firstItem="xce-mO-TBx" firstAttribute="centerX" secondItem="gMZ-I5-gYe" secondAttribute="centerX" id="HTV-8x-I5q"/>
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<constraint firstItem="xce-mO-TBx" firstAttribute="width" secondItem="8bC-Xf-vdC" secondAttribute="width" constant="-20" id="OzH-Sr-3uc"/>
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<constraint firstItem="gMZ-I5-gYe" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="c3e-hH-pRE"/>
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<constraint firstItem="gMZ-I5-gYe" firstAttribute="centerY" secondItem="8bC-Xf-vdC" secondAttribute="centerY" id="nKh-xD-zV1"/>
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</constraints>
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</view>
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<connections>
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<outlet property="indicator" destination="gMZ-I5-gYe" id="pya-LZ-csF"/>
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<outlet property="label" destination="xce-mO-TBx" id="8ka-Tc-7Am"/>
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</connections>
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</viewController>
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<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
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</objects>
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36
LayerVideoCompositor/LayerVideoCompositionInstruction.swift
Normal file
36
LayerVideoCompositor/LayerVideoCompositionInstruction.swift
Normal file
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@ -0,0 +1,36 @@
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//
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// LayerVideoCompositionInstruction.swift
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// LayerVideoCompositor
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//
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// Created by Sami Samhuri on 2016-09-05.
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// Copyright © 2016 Guru Logic Inc. All rights reserved.
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//
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import Foundation
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import AVFoundation
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final class LayerVideoCompositionInstruction: NSObject, AVVideoCompositionInstructionProtocol {
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// Fixed
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let enablePostProcessing: Bool = true
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let containsTweening: Bool = false
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let passthroughTrackID: CMPersistentTrackID = kCMPersistentTrackID_Invalid
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// Variable
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let timeRange: CMTimeRange
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let requiredSourceTrackIDs: [NSValue]?
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let videoTrackID: CMPersistentTrackID
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let targetSize: CGSize
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let transform: CGAffineTransform
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let overlayLayer: CALayer?
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init(track: AVAssetTrack, timeRange: CMTimeRange, overlayLayer: CALayer?, transform: CGAffineTransform, targetSize: CGSize) {
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assert(overlayLayer == nil || overlayLayer!.bounds.size == targetSize)
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self.requiredSourceTrackIDs = [NSNumber(value: track.trackID)]
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self.timeRange = timeRange
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self.videoTrackID = track.trackID
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self.transform = transform
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self.targetSize = targetSize
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self.overlayLayer = overlayLayer
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super.init()
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}
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}
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122
LayerVideoCompositor/LayerVideoCompositor.swift
Normal file
122
LayerVideoCompositor/LayerVideoCompositor.swift
Normal file
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@ -0,0 +1,122 @@
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//
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// LayerVideoCompositor.swift
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// LayerVideoCompositor
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//
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// Created by Sami Samhuri on 2016-09-05.
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// Copyright © 2016 Guru Logic Inc. All rights reserved.
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//
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import Foundation
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import Dispatch
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import AVFoundation
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import CoreImage
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enum LayerVideoCompositingError: Error {
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case invalidRequest
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case sourceFrameBuffer
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case overlayTextLayer
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}
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final class LayerVideoCompositor: NSObject, AVVideoCompositing {
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private let queue = DispatchQueue(label: "ca.gurulogic.layer-video-compositor.render", qos: .default)
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private var renderContext: AVVideoCompositionRenderContext = AVVideoCompositionRenderContext()
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private var cancelled: Bool = false
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private let ciContext: CIContext = {
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if let eaglContext = EAGLContext(api: .openGLES3) ?? EAGLContext(api: .openGLES2) {
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return CIContext(eaglContext: eaglContext)
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}
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return CIContext()
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}()
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private var cachedOverlaySnapshot: CGImage?
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private let colorSpace = CGColorSpaceCreateDeviceRGB()
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var supportsWideColorSourceFrames: Bool {
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return false
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}
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private static let pixelFormat = kCVPixelFormatType_32BGRA
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let sourcePixelBufferAttributes: [String : Any]? = [
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kCVPixelBufferPixelFormatTypeKey as String : NSNumber(value: LayerVideoCompositor.pixelFormat),
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kCVPixelBufferOpenGLESCompatibilityKey as String : NSNumber(value: true),
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]
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let requiredPixelBufferAttributesForRenderContext: [String : Any] = [
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kCVPixelBufferPixelFormatTypeKey as String : NSNumber(value: LayerVideoCompositor.pixelFormat),
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kCVPixelBufferOpenGLESCompatibilityKey as String : NSNumber(value: true),
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]
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func renderContextChanged(_ newRenderContext: AVVideoCompositionRenderContext) {
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renderContext = newRenderContext
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}
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func startRequest(_ request: AVAsynchronousVideoCompositionRequest) {
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queue.async {
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guard !self.cancelled else {
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request.finishCancelledRequest()
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return
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}
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do {
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let renderedBuffer = try self.renderFrame(forRequest: request)
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request.finish(withComposedVideoFrame: renderedBuffer)
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}
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catch {
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request.finish(with: error)
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}
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}
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}
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func cancelAllPendingVideoCompositionRequests() {
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cancelled = true
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queue.async(flags: .barrier) {
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self.cancelled = false
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}
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}
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private func overlaySnapshot(layer: CALayer) throws -> CGImage {
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if let cachedSnapshot = cachedOverlaySnapshot {
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return cachedSnapshot
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}
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layer.isGeometryFlipped = true
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let size = layer.bounds.size
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let w = Int(size.width)
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let h = Int(size.height)
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guard let context = CGContext(data: nil, width: w, height: h, bitsPerComponent: 8, bytesPerRow: 4 * w, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) else { throw NSError() }
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layer.render(in: context)
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guard let snapshot = context.makeImage() else { throw NSError() }
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cachedOverlaySnapshot = snapshot
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return snapshot
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}
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private func renderFrame(forRequest request: AVAsynchronousVideoCompositionRequest) throws -> CVPixelBuffer {
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return try autoreleasepool {
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guard let instruction = request.videoCompositionInstruction as? LayerVideoCompositionInstruction else {
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throw LayerVideoCompositingError.invalidRequest
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}
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guard let videoFrameBuffer = request.sourceFrame(byTrackID: instruction.videoTrackID) else {
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// Try to be resilient in the face of errors. If we can't even generate a blank frame then fail.
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if let blankBuffer = renderContext.newPixelBuffer() {
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return blankBuffer
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}
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else {
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throw LayerVideoCompositingError.sourceFrameBuffer
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}
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}
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let frameImage = CIImage(cvPixelBuffer: videoFrameBuffer).applying(instruction.transform)
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guard let layer = instruction.overlayLayer, let overlayImage = try? CIImage(cgImage: overlaySnapshot(layer: layer)),
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let composeFilter = CIFilter(name: "CISourceAtopCompositing") else {
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throw LayerVideoCompositingError.overlayTextLayer
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}
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composeFilter.setValue(frameImage, forKey: kCIInputBackgroundImageKey)
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composeFilter.setValue(overlayImage, forKey: kCIInputImageKey)
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guard let outputImage = composeFilter.outputImage,
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let renderedBuffer = renderContext.newPixelBuffer() else {
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throw LayerVideoCompositingError.overlayTextLayer
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}
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ciContext.render(outputImage, to: renderedBuffer, bounds: outputImage.extent, colorSpace: self.colorSpace)
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return renderedBuffer
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}
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}
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}
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@ -7,19 +7,97 @@
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//
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import UIKit
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import AVFoundation
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class ViewController: UIViewController {
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@IBOutlet private var label: UILabel?
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@IBOutlet private var indicator: UIActivityIndicatorView?
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view, typically from a nib.
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let path = Bundle.main.path(forResource: "video.mov", ofType: nil)
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let url = URL(fileURLWithPath: path!)
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let start = Date()
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overlayTextOnVideo(videoURL: url) { maybeURL in
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DispatchQueue.main.async {
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self.indicator?.stopAnimating()
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guard let url = maybeURL else {
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self.label?.text = "Error. See console for details."
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return
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}
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override func didReceiveMemoryWarning() {
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super.didReceiveMemoryWarning()
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// Dispose of any resources that can be recreated.
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let end = Date()
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let duration = end.timeIntervalSince1970 - start.timeIntervalSince1970
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print("Exported in \(duration) seconds.")
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self.label?.text = "Done. Video is in the Documents folder which you can access with iTunes, or an app like iMazing or iExplorer."
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let player = AVPlayer(url: url)
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let layer = AVPlayerLayer(player: player)
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let y = 16 + (self.label?.frame.maxY ?? 0)
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let width = self.view.bounds.width
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layer.frame = CGRect(x: 0, y: y, width: width, height: 9 / 16 * width)
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self.view.layer.addSublayer(layer)
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player.play()
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}
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}
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}
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private func newOverlayLayer(size: CGSize, text: String) -> CALayer {
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let margin: CGFloat = 16
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let textHeight: CGFloat = 120
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let textLayer = CATextLayer()
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textLayer.alignmentMode = kCAAlignmentCenter
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textLayer.fontSize = 96
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textLayer.frame = CGRect(x: margin, y: margin, width: size.width - 2 * margin, height: textHeight)
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textLayer.string = text
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textLayer.foregroundColor = UIColor(white: 1, alpha: 0.7).cgColor
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textLayer.shadowColor = UIColor.black.cgColor
|
||||
textLayer.shadowOpacity = 0.8
|
||||
|
||||
let overlayLayer = CALayer()
|
||||
overlayLayer.frame = CGRect(origin: .zero, size: size)
|
||||
overlayLayer.addSublayer(textLayer)
|
||||
|
||||
return overlayLayer
|
||||
}
|
||||
|
||||
private func overlayTextOnVideo(videoURL: URL, completion: @escaping (URL?) -> Void) {
|
||||
let asset = AVURLAsset(url: videoURL)
|
||||
let videoTracks = asset.tracks(withMediaType: AVMediaTypeVideo)
|
||||
guard let sourceVideoTrack = videoTracks.first else {
|
||||
print("error: asset has no video tracks")
|
||||
completion(nil)
|
||||
return
|
||||
}
|
||||
let timeRange = CMTimeRange(start: kCMTimeZero, duration: asset.duration)
|
||||
let videoComposition = AVMutableVideoComposition(propertiesOf: asset)
|
||||
videoComposition.customVideoCompositorClass = LayerVideoCompositor.self
|
||||
let overlayLayer = newOverlayLayer(size: sourceVideoTrack.naturalSize, text: "Layeriffic!")
|
||||
let instruction = LayerVideoCompositionInstruction(track: sourceVideoTrack, timeRange: timeRange, overlayLayer: overlayLayer, transform: sourceVideoTrack.preferredTransform, targetSize: sourceVideoTrack.naturalSize)
|
||||
videoComposition.instructions = [instruction]
|
||||
|
||||
let documentDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
|
||||
let path = documentDir.appending("/export.mov")
|
||||
let outputURL = URL(fileURLWithPath: path)
|
||||
_ = try? FileManager.default.removeItem(at: outputURL)
|
||||
|
||||
guard let presetName = AVAssetExportSession.exportPresets(compatibleWith: asset).first,
|
||||
let exportSession = AVAssetExportSession(asset: asset, presetName: presetName) else {
|
||||
print("failed to create asset export session")
|
||||
completion(nil)
|
||||
return
|
||||
}
|
||||
exportSession.videoComposition = videoComposition
|
||||
exportSession.outputFileType = AVFileTypeMPEG4
|
||||
exportSession.outputURL = outputURL
|
||||
exportSession.exportAsynchronously {
|
||||
guard exportSession.status == .completed else {
|
||||
print("export failed: \(exportSession.error)")
|
||||
completion(nil)
|
||||
return
|
||||
}
|
||||
completion(outputURL)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
BIN
LayerVideoCompositor/video.mov
Executable file
BIN
LayerVideoCompositor/video.mov
Executable file
Binary file not shown.
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Reference in a new issue