Question

我正在尝试对视频进行编码，以便可以在HTML5中的chrome上读取它。不幸的是我找不到编解码器。我已经尝试过MP4和Apple .mov（H.265）。我可以播放音轨，但是Chrome上的HTML5播放器没有图片。我试图在MP4中编码...但是它不起作用。该视频将发送到Google Storage，并使用HTML5在Chrome上显示。有没有人有办法解决吗？预先感谢。

func encodeVideo(videoUrl: URL, outputUrl: URL? = nil, resultClosure: @escaping (URL?) -> Void ) {

var finalOutputUrl: URL? = outputUrl

if finalOutputUrl == nil {
    var url = videoUrl
    url.deletePathExtension()
    url.appendPathExtension(".mp4")
    finalOutputUrl = url
}

if FileManager.default.fileExists(atPath: finalOutputUrl!.path) {
    print("Converted file already exists \(finalOutputUrl!.path)")
    resultClosure(finalOutputUrl)
    return
}

let asset = AVURLAsset(url: videoUrl)
if let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetPassthrough) {
    exportSession.outputURL = finalOutputUrl!
    exportSession.outputFileType = AVFileTypeMPEG4
    let start = CMTimeMakeWithSeconds(0.0, 0)
    let range = CMTimeRangeMake(start, asset.duration)
    exportSession.timeRange = range
    exportSession.shouldOptimizeForNetworkUse = true
    exportSession.exportAsynchronously() {

        switch exportSession.status {
        case .failed:
            print("Export failed: \(exportSession.error != nil ? exportSession.error!.localizedDescription : "No Error Info")")
        case .cancelled:
            print("Export canceled")
        case .completed:
            resultClosure(finalOutputUrl!)
        default:
            break
        }
    }
} else {
    resultClosure(nil)
}

}

Answer 1

当使用AVAssetExportPresetHighestQuality而不是AVAssetExportPresetPassthrough预设时，它可以在Chrome中使用。查看完整示例here

Swift和AVAssetExportSession：为Chrome和HTML5编码MP4视频

1 个答案: