基本的视频录制问题 [英] Issues with basic video recording
本文介绍了基本的视频录制问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
所以我遵循的首发视频录制应用程序默认的食谱，但我遇到了，我想不通的错误。我得到的错误是在记录prepare（）。跟它/0/test.mp4：打开失败：ENOENT（没有这样的文件或目录）现在我会贴code我在下面，误差是45行我也已经设置正确的权限为
＆LT;使用许可权的android：NAME =android.permission.CAMERA/＆GT;
＆LT;使用许可权的android：NAME =android.permission.CAPTURE_SECURE_VIDEO_OUTPUT/＆GT;
＆LT;使用许可权的android：NAME =android.permission.CAPTURE_VIDEO_OUTPUT/＆GT;
＆LT;使用许可权的android：NAME =android.permission.RECORD_AUDIO/＆GT;
＆LT;使用许可权的android：NAME =android.permission.WRITE_EXTERNAL_STORAGE/＆GT;
我以为这是罚款，我从recpie添加了CAMERA和RECORD_AUDIO，然后我从发布到谷歌上搜索之前，这个问题增加了其他三个。
使用系统;使用Android.App;
使用Android.Content;
使用Android.Runtime;
使用Android.Views;
使用Android.Widget;
使用Android.OS;
使用Android.Media;命名空间CameraTest
{
[活动（标签=CameraTest，MainLauncher = true时，图标=@绘制/图标）]
公共类MainActivity：活动
{
MediaRecorder记录; 保护覆盖无效的OnCreate（束束）
{
base.OnCreate（包）; 的setContentView（Resource.Layout.Main）;
VAR纪录= FindViewById＆LT;按钮和GT; （Resource.Id.Record）;
VAR停止= FindViewById＆LT;按钮和GT; （Resource.Id.Stop）;
VAR玩= FindViewById＆LT;按钮和GT; （Resource.Id.Play）;
VAR视频= FindViewById＆LT; VideoView＆GT; （Resource.Id.SampleVideoView）;
Android.OS.Environment.ExternalStorageDirectory.SetWritable（真）;
字符串路径= Android.OS.Environment.ExternalStorageDirectory.Name +/test.mp4
//从主布局资源设置我们的观点
//从布局资源获取我们的按钮，
//和事件附加到它
record.Click + = {委托
video.StopPlayback（）; 记录=新MediaRecorder（）;
recorder.SetVideoSource（VideoSource.Camera）;
recorder.SetAudioSource（AudioSource.Mic）;
recorder.SetOutputFormat（OutputFormat.Default）;
recorder.SetVideoEn codeR（VIDEOEN coder.Default）;
recorder.SetAudioEn codeR（AudioEn coder.Default）;
recorder.SetOutputFile（路径）;
recorder.Set $ P $ pviewDisplay（video.Holder.Surface）;
。录音机prepare（）;
recorder.Start（）; }; stop.Click + = {委托
如果（录像机！= NULL）{
recorder.Stop（）;
recorder.Release（）;
}
}; play.Click + = {委托
VAR URI = Android.Net.Uri.Parse（路径）;
video.SetVideoURI（URI）;
video.Start（）;
};
}
保护覆盖无效的OnDestroy（）
{
base.OnDestroy（）; 如果（录像机！= NULL）{
recorder.Release（）;
recorder.Dispose（）;
记录= NULL;
}
}
}
}
解决方案
修改
路径字符串= Android.OS.Environment.ExternalStorageDirectory.Name +/test.mp4
要：
路径字符串= Android.OS.Environment.ExternalStorageDirectory.AbsolutePath +/test.mp4
您原来的code只使用目录的名称未在完整路径作为输出位置。
So I followed the default recipe for a starter video recording app, but I am running into errors that I cannot figure out. The error I am getting is on recorder.Prepare(); it is saying /0/test.mp4: Open Failed: ENOENT (no such file or directory) Now I will paste the code I below, error is line 45. Also I have set permissions correctly as
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.CAPTURE_SECURE_VIDEO_OUTPUT" />
<uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
I assumed this was fine as I added the "CAMERA and RECORD_AUDIO" from the recpie and then I added the other three from googling this issue prior to posting.
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Android.Media;
namespace CameraTest
{
[Activity (Label = "CameraTest", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
MediaRecorder recorder;
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
SetContentView (Resource.Layout.Main);
var record = FindViewById<Button> (Resource.Id.Record);
var stop = FindViewById<Button> (Resource.Id.Stop);
var play = FindViewById<Button> (Resource.Id.Play);
var video = FindViewById<VideoView> (Resource.Id.SampleVideoView);
Android.OS.Environment.ExternalStorageDirectory.SetWritable(true);
string path = Android.OS.Environment.ExternalStorageDirectory.Name + "/test.mp4";
// Set our view from the "main" layout resource
// Get our button from the layout resource,
// and attach an event to it
record.Click += delegate {
video.StopPlayback ();
recorder = new MediaRecorder ();
recorder.SetVideoSource (VideoSource.Camera);
recorder.SetAudioSource (AudioSource.Mic);
recorder.SetOutputFormat (OutputFormat.Default);
recorder.SetVideoEncoder (VideoEncoder.Default);
recorder.SetAudioEncoder (AudioEncoder.Default);
recorder.SetOutputFile (path);
recorder.SetPreviewDisplay (video.Holder.Surface);
recorder.Prepare ();
recorder.Start (); } ;
stop.Click += delegate {
if (recorder != null) {
recorder.Stop ();
recorder.Release ();
}
};
play.Click += delegate {
var uri = Android.Net.Uri.Parse (path);
video.SetVideoURI (uri);
video.Start ();
};
}
protected override void OnDestroy ()
{
base.OnDestroy ();
if (recorder != null) {
recorder.Release ();
recorder.Dispose ();
recorder = null;
}
}
}
}
解决方案
Change
string path = Android.OS.Environment.ExternalStorageDirectory.Name + "/test.mp4";
To:
string path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + "/test.mp4";
Your original code only uses the directory name not the full path as the output location.
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