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Core Media Video
4 avril 2013, par
Mis à jour : Juin 2013
Langue : français
Type : Video
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (72)
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Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (11414)
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FFMPEG Video Multiplexer
4 décembre 2015, par NaderI am a DirectShow developer, I used to build multiplexers that take 2 video inputs and generate one output, I would then use a video encoder mux to feed it the output + anothrr audio stream to generate the final video output. The multiplexer (DirectShow framework) allows me to process the input video from two sources (for example, adding effects using the two frames).
Does anyone know how this can be done using FFMPEG, or at least point me to the right resources ? Thanks -
FFmpeg4Android : How to select videos from gallery ?
4 décembre 2015, par marianI have created an app using FFmpeg4Android library. I would like to add watermark into videos using ffmpeg. Command for adding watermark is working fine but the coding has pre-fixed video name in the command. I would like to choose videos from gallery folder and then add watermark to the videos. I do not know how to add intent for choosing videos with FFmpeg. I have tried to add the intent like this replacing the in.mp4 with PICK_FROM_GALLERY intent :
private void runTranscodingUsingLoader() {
Log.i(Prefs.TAG, "runTranscodingUsingLoader started...");
PowerManager powerManager = (PowerManager)ProgressBarExample.this.getSystemService(Activity.POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
Log.d(Prefs.TAG, "Acquire wake lock");
wakeLock.acquire();
Intent intent = new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_GALLERY);
String[] complexCommand = {"ffmpeg","-y" ,"-i", String.valueOf(PICK_FROM_GALLERY),"-strict","experimental",
"-vf", "movie=/sdcard/videokit/watermark.png [watermark];" +
" [in][watermark] overlay=main_w-overlay_w-10:10 [out]","-s",
"320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab",
"48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out1.mp4"};It opens the gallery but the watermarking command doesnt get executed in the selected video. Can someone help me to resolve this issue. I could not find proper references/examples regarding this. My full coding is as follows.
public class ProgressBarExample extends Activity {
public ProgressDialog progressBar;
String workFolder = null;
String demoVideoFolder = null;
String demoVideoPath = null;
String vkLogPath = null;
LoadJNI vk;
private final int STOP_TRANSCODING_MSG = -1;
private final int FINISHED_TRANSCODING_MSG = 0;
private boolean commandValidationFailedFlag = false;
private static final int PICK_FROM_GALLERY = 1;
private void runTranscodingUsingLoader() {
Log.i(Prefs.TAG, "runTranscodingUsingLoader started...");
PowerManager powerManager = (PowerManager)ProgressBarExample.this.getSystemService(Activity.POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
Log.d(Prefs.TAG, "Acquire wake lock");
wakeLock.acquire();
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental",
"-vf", "movie=/sdcard/videokit/watermark.png [watermark];" +
" [in][watermark] overlay=main_w-overlay_w-10:10 [out]","-s",
"320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab",
"48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out1.mp4"};
///////////////////////////////////////////////////////////////////////
vk = new LoadJNI();
try {
// running complex command with validation
vk.run(complexCommand, workFolder, getApplicationContext());
// running without command validation
//vk.run(complexCommand, workFolder, getApplicationContext(), false);
// running regular command with validation
//vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, getApplicationContext());
Log.i(Prefs.TAG, "vk.run finished.");
// copying vk.log (internal native log) to the videokit folder
GeneralUtils.copyFileToFolder(vkLogPath, demoVideoFolder);
} catch (CommandValidationException e) {
Log.e(Prefs.TAG, "vk run exeption.", e);
commandValidationFailedFlag = true;
} catch (Throwable e) {
Log.e(Prefs.TAG, "vk run exeption.", e);
}
finally {
if (wakeLock.isHeld()) {
wakeLock.release();
Log.i(Prefs.TAG, "Wake lock released");
}
else{
Log.i(Prefs.TAG, "Wake lock is already released, doing nothing");
}
}
// finished Toast
String rc = null;
if (commandValidationFailedFlag) {
rc = "Command Vaidation Failed";
}
else {
rc = GeneralUtils.getReturnCodeFromLog(vkLogPath);
}
final String status = rc;
ProgressBarExample.this.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(ProgressBarExample.this, status, Toast.LENGTH_LONG).show();
if (status.equals("Transcoding Status: Failed")) {
Toast.makeText(ProgressBarExample.this, "Check: " + vkLogPath + " for more information.", Toast.LENGTH_LONG).show();
}
}
});
}
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i(Prefs.TAG, "onCreate ffmpeg4android ProgressBarExample");
super.onCreate(savedInstanceState);
setContentView(R.layout.ffmpeg_demo_client_2);
demoVideoFolder = Environment.getExternalStorageDirectory().getAbsolutePath() + "/videokit/";
demoVideoPath = demoVideoFolder + "in.mp4";
Log.i(Prefs.TAG, getString(R.string.app_name) + " version: " + GeneralUtils.getVersionName(getApplicationContext()) );
Button invoke = (Button)findViewById(R.id.invokeButton);
invoke.setOnClickListener(new OnClickListener() {
public void onClick(View v){
Log.i(Prefs.TAG, "run clicked.");
runTranscoding();
}
});
workFolder = getApplicationContext().getFilesDir() + "/";
Log.i(Prefs.TAG, "workFolder (license and logs location) path: " + workFolder);
vkLogPath = workFolder + "vk.log";
Log.i(Prefs.TAG, "vk log (native log) path: " + vkLogPath);
GeneralUtils.copyLicenseFromAssetsToSDIfNeeded(this, workFolder);
GeneralUtils.copyDemoVideoFromAssetsToSDIfNeeded(this, demoVideoFolder);
int rc = GeneralUtils.isLicenseValid(getApplicationContext(), workFolder);
Log.i(Prefs.TAG, "License check RC: " + rc);
}
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
Log.i(Prefs.TAG, "Handler got message");
if (progressBar != null) {
progressBar.dismiss();
// stopping the transcoding native
if (msg.what == STOP_TRANSCODING_MSG) {
Log.i(Prefs.TAG, "Got cancel message, calling fexit");
vk.fExit(getApplicationContext());
}
}
}
};
public void runTranscoding() {
progressBar = new ProgressDialog(ProgressBarExample.this);
progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressBar.setTitle("FFmpeg4Android Direct JNI");
progressBar.setMessage("Press the cancel button to end the operation");
progressBar.setMax(100);
progressBar.setProgress(0);
progressBar.setCancelable(false);
progressBar.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
handler.sendEmptyMessage(STOP_TRANSCODING_MSG);
}
});
progressBar.show();
new Thread() {
public void run() {
Log.d(Prefs.TAG,"Worker started");
try {
//sleep(5000);
runTranscodingUsingLoader();
handler.sendEmptyMessage(FINISHED_TRANSCODING_MSG);
} catch(Exception e) {
Log.e("threadmessage",e.getMessage());
}
}
}.start();
// Progress update thread
new Thread() {
ProgressCalculator pc = new ProgressCalculator(vkLogPath);
public void run() {
Log.d(Prefs.TAG,"Progress update started");
int progress = -1;
try {
while (true) {
sleep(300);
progress = pc.calcProgress();
if (progress != 0 && progress < 100) {
progressBar.setProgress(progress);
}
else if (progress == 100) {
Log.i(Prefs.TAG, "==== progress is 100, exiting Progress update thread");
pc.initCalcParamsForNextInter();
break;
}
}
} catch(Exception e) {
Log.e("threadmessage",e.getMessage());
}
}
}.start();
}
}Any help/guidance would be really helpful. Thank you.
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FFmpeg Concat artefact between bribes
3 février 2016, par MaypeurI use FFmpeg to concat 3 mp4 video bribes.
FFbrope show all bribes start with a keyframes and play very well in VLC.
When playing the final video file some artefact appears when a bribe start :
ffmpeg.exe -f concat -i video_bribes.list -codec:v copy -acodec none -movflags faststart -y v_2.mp4I tried differents options in the concat command line to re encode but artefact are still here.
What can i do to avoid this grey artefact between bribes ?
Thanks.
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