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Autres articles (96)
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Les sons
15 mai 2013, par -
Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...) -
MediaSPIP en mode privé (Intranet)
17 septembre 2013, parÀ partir de la version 0.3, un canal de MediaSPIP peut devenir privé, bloqué à toute personne non identifiée grâce au plugin "Intranet/extranet".
Le plugin Intranet/extranet, lorsqu’il est activé, permet de bloquer l’accès au canal à tout visiteur non identifié, l’empêchant d’accéder au contenu en le redirigeant systématiquement vers le formulaire d’identification.
Ce système peut être particulièrement utile pour certaines utilisations comme : Atelier de travail avec des enfants dont le contenu ne doit pas (...)
Sur d’autres sites (11682)
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Video capturing in portrait mode but the orientation is wrong when played back with a media player
17 octobre 2016, par Ahmed MujtabaI’m trying to make a custom video app. The app captures a video using mediarecorder and uploads it to the website where it’s played on a html5 media player. The issue is that, when I capture the video in portrait mode, the playback video on the website and on vlc player have it’s orientation off by 90 degrees. I have tried various solution on the internet but none work for me.
Here’s what my code for setting up the media recorder :
private bool prepareMediaRecorder() {
Android.Hardware.Camera.Parameters p = mCamera.GetParameters();
List 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;
}The orientation of the video is fine when played on the phone app but on the website it’s not. I tried to use FFMPEG encoder to rotate the video clockwise. This seemed to fix the orientation of the video, however the aspect ratio of the video is all messed up. The video is stretched vertically and goes off screen.
The command I’m using to rotate and encode the video is as follows :-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 destinationPathI will really appreciate if someone can help me fix either the orientation of the video or the aspect ration after encoding the video.
Cheers !
Edit.
Here’s the readout of the input file :
General
Complete name : C:\Users\Ahmed\Desktop\9adcdb56-500e-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 -
how to add only Frame rate mode using FFMPEG for an AVI file
7 août 2023, par harishbhatFor one of our 3rd party tool to work we need our AVI files should contain the

Frame rate mode : Variable
Using FFMPEG is it possible to add this tag in the video section ?

Tried different commands like


ffmpeg -i Input.avi -r 30 Output.avi

ffmpeg -i Input.avi -vf "fps=30,settb=1/1000" Output.avi

ffmpeg -i Input.avi -r 30 -fps_mode vbr Output.avi

But none of them inserting the "Frame rate Mode" tag.


Expected structure is :


mediainfo Input.avi 
General
Complete name : Input.avi
Format : AVI
Format/Info : Audio Video Interleave
Format settings : BitmapInfoHeader / WaveFormatEx
File size : 2.17 MiB
Duration : 30 s 613 ms
Overall bit rate : 596 kb/s
Frame rate : 30.000 FPS
Writing application : Lavf57.19.100

Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 4 frames
Codec ID : H264
Duration : 30 s 33 ms
Bit rate : 447 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
**Frame rate mode : Variable**
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.007
Stream size : 1.60 MiB (74%)
Writing library : x264 core 148


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ffmpeg livestream from static image and audio
23 mai 2017, par boygiandiI’m trying to livestream by ffmpeg using static image and audio file. The ffmpeg command like this
ffmpeg -re -loop 1 -f image2 -i ’/tmp/11.jpg’ -f lavfi -i amovie=/tmp/5117.mp3:loop=999 -video_size 600x480 -c:v libx264 -x264-params keyint=60 -bufsize 500k -c:a aac -ar 44100 -b:a 128k -r 30 -g 60 -pix_fmt yuv420p -f flv "rtmp ://"
/tmp/11.jpg was generated by another process and keep updated twice per second. The ffmpeg command doesn’t look right, first, it show status like this
frame= 85 fps=9.4 q=29.0 size= 2261kB time=00:02:24.19 bitrate= 128.4kbits/s speed= 16x
As you see, 16x is not good, 1x is the right value for livestream. Then, after a while, it show many warning log like this
[flv @ 0x322bd60] Non-monotonous DTS in output stream 0:1 ; previous : 335993, current : 297752 ; changing to 335993. This may result in incorrect timestamps in the output file.
Please help to fix it.
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