我正在嘗試將兩個視頻合并到AVFoundation. 我正在使用AVMutableComposition并將兩個軌道都添加到合成中，從而生成最終視頻，其中我有第一個帶有音頻的視頻，然后是第二個音頻但沒有視頻。
如何獲取兩個曲目的音頻和視頻？
謝謝
let composition = AVMutableComposition()
let audioTrack: AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaType.audio, preferredTrackID: kCMPersistentTrackID_Invalid)!
let videoTrack: AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: kCMPersistentTrackID_Invalid)!
let audioTrack2: AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaType.audio, preferredTrackID: kCMPersistentTrackID_Invalid)!
let videoTrack2: AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID: kCMPersistentTrackID_Invalid)!
var outputURL = documentDirectory.appendingPathComponent("output-temp")
do {
try! audioTrack.insertTimeRange(CMTimeRangeFromTimeToTime(start: startTime, end: endTime), of: asset.tracks(withMediaType: AVMediaType.audio)[0], at: CMTime.zero)
try! videoTrack.insertTimeRange(CMTimeRangeFromTimeToTime(start: startTime, end: endTime), of: asset.tracks(withMediaType: AVMediaType.video)[0], at: CMTime.zero)
try! audioTrack2.insertTimeRange(CMTimeRangeFromTimeToTime(start: startTime, end: asset2.duration), of: asset2.tracks(withMediaType: AVMediaType.audio)[0], at: CMTime.invalid)
try! videoTrack2.insertTimeRange(CMTimeRangeFromTimeToTime(start: startTime, end: asset2.duration), of: asset2.tracks(withMediaType: AVMediaType.video)[0], at: CMTime.invalid)
try manager.createDirectory(at: outputURL, withIntermediateDirectories: true, attributes: nil)
let id = "id-\(Int.random(in: 0...199))"
let mediaType = "mp4"
outputURL = outputURL.appendingPathComponent("preVideo-\(id).\(mediaType)")
} catch let error {
print(error)
}
uj5u.com熱心網友回復：
問題是您正在向合成中添加第二個視頻軌道。您需要將兩個視頻插入同一視頻軌道。只需洗掉您的let videoTrack2并從那里開始。
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