以纵向模式拍摄视频，但使用媒体播放器播放时方向错误
Video capturing in portrait mode but the orientation is wrong when played back with a media player
我正在尝试制作自定义视频应用。该应用程序使用 mediarecorder 捕获视频并将其上传到在 html5 媒体播放器上播放的网站。问题是，当我以纵向模式拍摄视频时，网站和 vlc 播放器上的播放视频的方向偏离了 90 度。我在互联网上尝试了各种解决方案，但 none 对我有用。
这是我设置媒体记录器的代码：
private bool prepareMediaRecorder() {
Android.Hardware.Camera.Parameters p = mCamera.GetParameters();
List<Android.Hardware.Camera.Size> previewSizes = p.SupportedPreviewSizes.ToList();
//mCamera = GetCameraInstance();
//setCameraDisplayOrientation(Activity, cameraId, mCamera);
mediaRecorder = new MediaRecorder();
mCamera.Unlock();
mediaRecorder.SetCamera(mCamera);
mediaRecorder.SetAudioSource(AudioSource.Camcorder);
mediaRecorder.SetVideoSource(VideoSource.Camera);
mediaRecorder.SetOrientationHint(CameraS.result);
if (currentapiVersion >= 16)
{
mediaRecorder.SetProfile(CamcorderProfile.Get(CamcorderQuality.High)); // requires API Level 8 or higher
}
else
{
mediaRecorder.SetProfile(CamcorderProfile.Get(CamcorderQuality.Q480p)); // requires API Level 8 or higher
}
//mediaRecorder.SetVideoFrameRate(30);
mediaRecorder.SetOutputFile(localPath);
mediaRecorder.SetMaxDuration(600000); // Set max duration 60 sec.
mediaRecorder.SetMaxFileSize(50000000); // Set max file size 50M
mediaRecorder.SetVideoSize(previewSizes[0].Width, previewSizes[0].Height);
mediaRecorder.SetPreviewDisplay(mPreview.Holder.Surface);
mediaRecorder.SetOrientationHint(getDisplayOrientationAngle());
try
{
mediaRecorder.Prepare();
}
catch (IllegalStateException e)
{
releaseMediaRecorder();
return false;
}
catch (Java.IO.IOException e)
{
releaseMediaRecorder();
return false;
}
return true;
}
public int getDisplayOrientationAngle() {
//Log.e("", "setDisplayOrientationAngle is call");
int angle;
var mDisplayRotation = Activity.WindowManager.DefaultDisplay.Rotation;
// switch (MeasurementNativeActivity.DisplayRotation) {
switch (mDisplayRotation)
{
case SurfaceOrientation.Rotation0: // This is display orientation
angle = 90; // This is camera orientation
break;
case SurfaceOrientation.Rotation90:
angle = 0;
break;
case SurfaceOrientation.Rotation180:
angle = 270;
break;
case SurfaceOrientation.Rotation270:
angle = 180;
break;
default:
angle = 90;
break;
}
//Log.v("", "media recorder displayRotation: " + mDisplayRotation);
//Log.v("", "media recorder angle: " + angle);
return angle;
}
在 phone 应用程序上播放时视频的方向很好，但在网站上则不然。我尝试使用 FFMPEG 编码器顺时针旋转视频。这似乎修复了视频的方向，但是视频的宽高比都搞砸了。视频被垂直拉伸并离开屏幕。
我用来旋转和编码视频的命令如下：
-y -i inputPath -vf scale=640:480,setsar=1,transpose=1 -strict experimental -r 25 -vcodec mpeg4 -b 1000k ab 48000 -ac 2 -ar 22050 destinationPath
如果有人能帮我修正视频的方向或视频编码后的纵横比，我将不胜感激。
干杯！
编辑。
这是输入文件的读数：
General
Complete name : C:\Users\Ahmed\Desktopadcdb56-500e-4d3f-8fb2-ccf20c680422_yt.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 6.30 MiB
Duration : 12s 437ms
Overall bit rate : 4 251 Kbps
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=31
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 12s 323ms
Bit rate : 3 967 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Rotation : 90°
Frame rate mode : Variable
Frame rate : 29.700 fps
Minimum frame rate : 29.354 fps
Maximum frame rate : 30.040 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.145
Stream size : 5.83 MiB (92%)
Title : VideoHandle
Language : English
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 12s 437ms
Source duration : 12s 454ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Nominal bit rate : 96.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 194 KiB (3%)
Source stream size : 194 KiB (3%)
Title : SoundHandle
Language : English
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
mdhd_Duration : 12454
开头应该是-y -noautorotate -i inputPath -vf transpose=1,scale=360:640,setsar=1 -metadata:s:v rotate=0
如果不删除旋转标签，某些播放器仍会显示旋转的视频。此外，不到一年的 ffmpeg 版本会自动剥离标签并旋转视频。如果您手动应用旋转，这可能会导致意外行为。
我正在尝试制作自定义视频应用。该应用程序使用 mediarecorder 捕获视频并将其上传到在 html5 媒体播放器上播放的网站。问题是，当我以纵向模式拍摄视频时，网站和 vlc 播放器上的播放视频的方向偏离了 90 度。我在互联网上尝试了各种解决方案，但 none 对我有用。
这是我设置媒体记录器的代码：
private bool prepareMediaRecorder() {
Android.Hardware.Camera.Parameters p = mCamera.GetParameters();
List<Android.Hardware.Camera.Size> previewSizes = p.SupportedPreviewSizes.ToList();
//mCamera = GetCameraInstance();
//setCameraDisplayOrientation(Activity, cameraId, mCamera);
mediaRecorder = new MediaRecorder();
mCamera.Unlock();
mediaRecorder.SetCamera(mCamera);
mediaRecorder.SetAudioSource(AudioSource.Camcorder);
mediaRecorder.SetVideoSource(VideoSource.Camera);
mediaRecorder.SetOrientationHint(CameraS.result);
if (currentapiVersion >= 16)
{
mediaRecorder.SetProfile(CamcorderProfile.Get(CamcorderQuality.High)); // requires API Level 8 or higher
}
else
{
mediaRecorder.SetProfile(CamcorderProfile.Get(CamcorderQuality.Q480p)); // requires API Level 8 or higher
}
//mediaRecorder.SetVideoFrameRate(30);
mediaRecorder.SetOutputFile(localPath);
mediaRecorder.SetMaxDuration(600000); // Set max duration 60 sec.
mediaRecorder.SetMaxFileSize(50000000); // Set max file size 50M
mediaRecorder.SetVideoSize(previewSizes[0].Width, previewSizes[0].Height);
mediaRecorder.SetPreviewDisplay(mPreview.Holder.Surface);
mediaRecorder.SetOrientationHint(getDisplayOrientationAngle());
try
{
mediaRecorder.Prepare();
}
catch (IllegalStateException e)
{
releaseMediaRecorder();
return false;
}
catch (Java.IO.IOException e)
{
releaseMediaRecorder();
return false;
}
return true;
}
public int getDisplayOrientationAngle() {
//Log.e("", "setDisplayOrientationAngle is call");
int angle;
var mDisplayRotation = Activity.WindowManager.DefaultDisplay.Rotation;
// switch (MeasurementNativeActivity.DisplayRotation) {
switch (mDisplayRotation)
{
case SurfaceOrientation.Rotation0: // This is display orientation
angle = 90; // This is camera orientation
break;
case SurfaceOrientation.Rotation90:
angle = 0;
break;
case SurfaceOrientation.Rotation180:
angle = 270;
break;
case SurfaceOrientation.Rotation270:
angle = 180;
break;
default:
angle = 90;
break;
}
//Log.v("", "media recorder displayRotation: " + mDisplayRotation);
//Log.v("", "media recorder angle: " + angle);
return angle;
}
在 phone 应用程序上播放时视频的方向很好，但在网站上则不然。我尝试使用 FFMPEG 编码器顺时针旋转视频。这似乎修复了视频的方向，但是视频的宽高比都搞砸了。视频被垂直拉伸并离开屏幕。 我用来旋转和编码视频的命令如下：
-y -i inputPath -vf scale=640:480,setsar=1,transpose=1 -strict experimental -r 25 -vcodec mpeg4 -b 1000k ab 48000 -ac 2 -ar 22050 destinationPath
如果有人能帮我修正视频的方向或视频编码后的纵横比，我将不胜感激。
干杯！
编辑。
这是输入文件的读数：
General
Complete name : C:\Users\Ahmed\Desktopadcdb56-500e-4d3f-8fb2-ccf20c680422_yt.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 6.30 MiB
Duration : 12s 437ms
Overall bit rate : 4 251 Kbps
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=31
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 12s 323ms
Bit rate : 3 967 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Rotation : 90°
Frame rate mode : Variable
Frame rate : 29.700 fps
Minimum frame rate : 29.354 fps
Maximum frame rate : 30.040 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.145
Stream size : 5.83 MiB (92%)
Title : VideoHandle
Language : English
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 12s 437ms
Source duration : 12s 454ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Nominal bit rate : 96.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 194 KiB (3%)
Source stream size : 194 KiB (3%)
Title : SoundHandle
Language : English
Encoded date : UTC 2016-05-29 23:54:30
Tagged date : UTC 2016-05-29 23:54:30
mdhd_Duration : 12454
开头应该是-y -noautorotate -i inputPath -vf transpose=1,scale=360:640,setsar=1 -metadata:s:v rotate=0
如果不删除旋转标签，某些播放器仍会显示旋转的视频。此外，不到一年的 ffmpeg 版本会自动剥离标签并旋转视频。如果您手动应用旋转，这可能会导致意外行为。