Duet-并排合并2个视频 [英] Duet - Merge 2 Videos Side by Side

问题描述

注意:-并排合并视频而不会降低视频质量

NOTE:- Merge Videos Side By Side WITHOUT Losing Video Quality

我认为这是一个非常重要问题，经过大量搜索&谷歌搜索，没有找到与此问题相关的任何有用材料.

I think that is a Very Very Important Question, After a lot of searches & Googling, didn't find any helpful material related to this Question.

我正在一个项目中，我需要将视频并排合并到一个文件中.

I'm working on a Project where I need to MERGE Videos Side-By-Side in a single file.

我已经使用AVFoundation完成了合并视频，但是问题是FIRST Video显示为SECOND视频的叠加层(与 SMULE App/Karaoke App或Tiktok App合并不正确) ).

I had done Merged Videos using AVFoundation But the problem is FIRST Video is showing as an Overlay to a SECOND video(not Merging properly as same as SMULE App/Karaoke App or Tiktok App).

func mergeVideosFilesWithUrl(savedVideoUrl: URL, newVideoUrl: URL, audioUrl:URL)
    {
        let savePathUrl : NSURL = NSURL(fileURLWithPath: NSHomeDirectory() + "/Documents/camRecordedVideo.mp4")
        do { // delete old video
            try FileManager.default.removeItem(at: savePathUrl as URL)
        } catch { print(error.localizedDescription) }

        var mutableVideoComposition : AVMutableVideoComposition = AVMutableVideoComposition()
        var mixComposition : AVMutableComposition = AVMutableComposition()

        let aNewVideoAsset : AVAsset = AVAsset(url: newVideoUrl)
        let asavedVideoAsset : AVAsset = AVAsset(url: savedVideoUrl)

        let aNewVideoTrack : AVAssetTrack = aNewVideoAsset.tracks(withMediaType: AVMediaType.video)[0]
        let aSavedVideoTrack : AVAssetTrack = asavedVideoAsset.tracks(withMediaType: AVMediaType.video)[0]

        let mutableCompositionNewVideoTrack : AVMutableCompositionTrack = mixComposition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: kCMPersistentTrackID_Invalid)!
        do{
            try mutableCompositionNewVideoTrack.insertTimeRange(CMTimeRangeMake(start: CMTime.zero, duration: aNewVideoAsset.duration), of: aNewVideoTrack, at: CMTime.zero)
        }catch {  print("Mutable Error") }

        let mutableCompositionSavedVideoTrack : AVMutableCompositionTrack = mixComposition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: kCMPersistentTrackID_Invalid)!
        do{
            try mutableCompositionSavedVideoTrack.insertTimeRange(CMTimeRangeMake(start: CMTime.zero, duration: asavedVideoAsset.duration), of: aSavedVideoTrack , at: CMTime.zero)
        }catch{ print("Mutable Error") }

        let mainInstruction = AVMutableVideoCompositionInstruction()
        mainInstruction.timeRange = CMTimeRangeMake(start: CMTime.zero, duration: CMTimeMaximum(aNewVideoAsset.duration, asavedVideoAsset.duration) )

        let newVideoLayerInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: mutableCompositionNewVideoTrack)
        let newScale : CGAffineTransform = CGAffineTransform.init(scaleX: 0.7, y: 0.7)
        let newMove : CGAffineTransform = CGAffineTransform.init(translationX: 230, y: 230)
        newVideoLayerInstruction.setTransform(newScale.concatenating(newMove), at: CMTime.zero)

        let savedVideoLayerInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: mutableCompositionSavedVideoTrack)
        let savedScale : CGAffineTransform = CGAffineTransform.init(scaleX: 1.2, y: 1.5)
        let savedMove : CGAffineTransform = CGAffineTransform.init(translationX: 0, y: 0)
        savedVideoLayerInstruction.setTransform(savedScale.concatenating(savedMove), at: CMTime.zero)

        mainInstruction.layerInstructions = [newVideoLayerInstruction, savedVideoLayerInstruction]


        mutableVideoComposition.instructions = [mainInstruction]
        mutableVideoComposition.frameDuration = CMTimeMake(value: 1, timescale: 30)
        mutableVideoComposition.renderSize = CGSize(width: 1240 , height: self.camPreview.frame.height)

        finalPath = savePathUrl.absoluteString
        let assetExport: AVAssetExportSession = AVAssetExportSession(asset: mixComposition, presetName: AVAssetExportPresetHighestQuality)!
        assetExport.videoComposition = mutableVideoComposition
        assetExport.outputFileType = AVFileType.mov

        assetExport.outputURL = savePathUrl as URL
        assetExport.shouldOptimizeForNetworkUse = true

        assetExport.exportAsynchronously { () -> Void in
            switch assetExport.status {

            case AVAssetExportSession.Status.completed:
                print("success")
            case  AVAssetExportSession.Status.failed:
                print("failed \(assetExport.error)")
            case AVAssetExportSession.Status.cancelled:
                print("cancelled \(assetExport.error)")
            default:
                print("complete")
            }
        }

    }

这是我的输出

还有我想要的

由于我不知道制作"SIDE BY SIDE VIDEO/DUET VIDEO"的最佳方法是什么...到目前为止，我已经使用了AVFoundation.我没有使用任何第三者框架或任何POD.

As I don't know what is the best approach to make a SIDE BY SIDE VIDEO/DUET VIDEO... As for now, I have used AVFoundation. I have not used any 3rd party framework or any POD.

我想问，实现此目标的最佳方法是什么?视频应该在服务器端还是在应用程序上合并?还有我应该使用哪种方法?

I would like to ask, what is the BEST Approach to implement this? Videos should Merge on Server side or an App? Also which Approach I should use?

任何帮助都会受到高度赞赏.谢谢

推荐答案

要实现这一点，我将创建一个新的AVMutableComposition对象，其中包含2条轨道，并在每条轨道上设置transform使其并排放置:

To achieve this, I would create a new AVMutableComposition object containing 2 tracks, and set transform on each to place them side by side:

let composition = AVMutableComposition(urlAssetInitializationOptions: <your options>)
let videoTrackA = composition.addMutableTrack(withMediaType:.video, preferredTrackID:kCMPersistentTrackID_Invalid);
let videoTrackB = composition.addMutableTrack(withMediaType:.video, preferredTrackID:kCMPersistentTrackID_Invalid);

videoTrackA.preferredTransform = CGAffineTransform(translationX: <yourX_for_A>, y:0.0)
videoTrackB.preferredTransform = CGAffineTransform(translationX: <yourX_for_B>, y:0.0)

然后.使用以下方法保存它:

Then. save it using:

let exporter = AVAssetExportSession(asset:<yourAsset>, presetName:<yourPresetName>)
exporter.exportAsynchronously(completionHandler: <yourCompletionHandler>)

(未测试Swift代码).

(Swift code not tested).

这篇关于Duet-并排合并2个视频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！