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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (101)
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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 (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
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.
Sur d’autres sites (14646)
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Progress Bar findviewbyid returns null
1er avril 2017, par ziad kiwanHelp me please it’s getting frustrating !
i’m doing a chat application where i’m adding views to a linear layout programmatically each time a user press the send button the code is below :
public void appendToMessageHistory(String id,String uname, String messa,String messageType, final String filepath, String DownloadStatus,boolean internet,int type) {
//TextView tv=new TextView(Messaging.this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(Width, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(0, 10, 0, 0);
View v = getLayoutInflater().inflate(R.layout.message_entity, null);
TextView mess;
TextView time;
final ImageView iv;
final ProgressBar progressBar;
ImageView statusiv;
if (friend.userName.equals(uname)) {
v = getLayoutInflater().inflate(R.layout.message_entity, null);
v.setId(Integer.parseInt(id));
mess = (TextView) v.findViewById(R.id.message_entity_message);
time = (TextView) v.findViewById(R.id.message_entity_time);
iv = (ImageView) v.findViewById(R.id.message_entity_imageview);
statusiv = (ImageView) v.findViewById(R.id.imageView);
progressBar = (ProgressBar) v.findViewById(R.id.message_entity_progressbar);
} else {
v = getLayoutInflater().inflate(R.layout.message_entity_right, null);
lp.gravity = Gravity.RIGHT;
v.setId(Integer.parseInt(id));
mess = (TextView) v.findViewById(R.id.message_entity_right_message);
time = (TextView) v.findViewById(R.id.message_entity_right_time);
iv = (ImageView) v.findViewById(R.id.message_entity_right_imageview);
statusiv = (ImageView)v.findViewById(R.id.imageViewleft);
progressBar = (ProgressBar) v.findViewById(R.id.message_entity_Right_progressbar);
}
try {
progressBar.setId(Integer.parseInt(id));
} catch (Exception e) {
e.printStackTrace();
}
if (messageType != null) {
if (messageType.equals(MessageInfo.MESSAGE_TYPE_PIC)) {
iv.setImageBitmap(ImageHandlet.GetBitmapFromPath(filepath));
progressBar.setVisibility(View.GONE);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + filepath), "image/png");
startActivity(intent);
Log.d("FIlePAth", filepath);
}
});
} else if (messageType.equals(MessageInfo.MESSAGE_TYPE_VIDEO)) {
if (DownloadStatus.equals(LocalStorageHandler.DOWNLOADED)) {
if(!(friend.userName.equals(uname))) {
if (type != 3) {
Bitmap bitTh = ThumbnailUtils.createVideoThumbnail(filepath, MediaStore.Images.Thumbnails.MINI_KIND);
iv.setImageBitmap(bitTh);
progressBar.setVisibility(View.GONE);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(filepath));
intent.setDataAndType(Uri.parse(filepath), "video/mp4");
startActivity(intent);
}
});
} else {
Log.w("Zipping","Progress Bar");
progressBar.setVisibility(View.VISIBLE);
}
} else {
Bitmap bitTh = ThumbnailUtils.createVideoThumbnail(filepath, MediaStore.Images.Thumbnails.MINI_KIND);
iv.setImageBitmap(bitTh);
progressBar.setVisibility(View.GONE);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(filepath));
intent.setDataAndType(Uri.parse(filepath), "video/mp4");
startActivity(intent);
}
});
}
} else if (DownloadStatus.equals(LocalStorageHandler.NotDOWNLOADED)) {
iv.setTag(id);
iv.setImageResource(R.drawable.download);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
progressBar.setVisibility(View.VISIBLE);
Cursor c = localstoragehandler.getIDnfo(iv.getTag().toString());
String filepath = "";
//Toast.makeText(getApplication(),iv.getTag().toString()+" iD " +iv.getId(),Toast.LENGTH_SHORT).show();
while (c.moveToNext()) {
String msg0 = c.getString(0);
String msg2 = c.getString(2);
String msg3 = c.getString(3);
String msg4 = c.getString(4);
String msg5 = c.getString(5);
String msg6 = c.getString(6);
filepath = msg5;
Log.d("-----------Vedio-----", "------------------");
Log.d("DATABASE---------", msg0);
Log.d("DATABASE-------", msg2);
Log.d("DATABASE---------", msg3);
Log.d("DATABASE-----", msg4 + "");
Log.d("DATABASE-------", msg5 + "");
Log.d("DATABASE----------", msg6 + "");
Log.d("--------END-------", "-------END-----------");
}
Toast.makeText(getApplicationContext(), filepath.toString() + iv.getTag().toString(), Toast.LENGTH_SHORT).show();
DownloadFileFromURL downloadFileFromURL = new DownloadFileFromURL(filepath, iv.getTag().toString());
downloadFileFromURL.execute("");
}
});
}
} else {
iv.setVisibility(View.GONE);
progressBar.setVisibility(View.GONE);
}
}
if(!(messageType.equals(MessageInfo.MESSAGE_TYPE_VIDEO))) {
if (!internet) {
statusiv.setImageResource(R.drawable.noconnectionl);
}
}
mess.setText(messa);
//time.setText(sendt);
v.setLayoutParams(lp);
final View lastview = v;
runOnUiThread(new Runnable() {
@Override
public void run() {
mEssageBox.addView(lastview);
}
});
scrollView.post(new Runnable() {
@Override
public void run() {
scrollView.fullScroll(View.FOCUS_DOWN);
messageText.requestFocus();
}
});
}and here is the XML of the dialogbox :
<?xml version="1.0" encoding="utf-8"?>
<relativelayout>
<imageview></imageview>
<relativelayout>
<textview></textview>
<textview></textview>
<imageview></imageview>
<progressbar style="?android:attr/progressBarStyleLarge"></progressbar>
</relativelayout>
</relativelayout>And here is the code to send the video message :
final String message = messageText.getText().toString();
final Long rowid = localstoragehandler.insert(imService.getUsername(), friend.userName, message, MessageInfo.MESSAGE_TYPE_VIDEO, ZippedVideoPath, LocalStorageHandler.DOWNLOADED); //insert data into db and get to chat_id
appendToMessageHistory(rowid + "", imService.getUsername(), message, MessageInfo.MESSAGE_TYPE_VIDEO, ZippedVideoPath, LocalStorageHandler.DOWNLOADED, internet,3);// append the video with type 3 to just display the progress
messageText.setText("Video");
String newstr = null;
// intialize the asynctask to upload the video
class UploadVideo extends AsyncTask {
ProgressDialog uploading;
View V;
UploadVideo(View v){
V = v;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
// uploading = ProgressDialog.show(Messaging.this, "Uploading File", "Please wait...", false, false);
}
@Override
protected String doInBackground(Void... params) {
return imService.sendVideoMessage(imService.getUsername(), friend.userName, message, MessageInfo.MESSAGE_TYPE_VIDEO, "", ZippedVideoPath);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
// RelativeLayout v = (RelativeLayout) V.findViewById(rowid.intValue());
// Log.w("Zipping",v.toString());
// ProgressBar progressBar1 = (ProgressBar) V.findViewById(R.id.message_entity_Right_progressbar);
// Log.w("Zipping",progressBar1.toString());
// ImageView iv = (ImageView) v.findViewById(R.id.message_entity_right_imageview);
// progressBar1.setVisibility(View.GONE);
// Log.d("POST Execute", s + "");
//textViewResponse.setText(Html.fromHtml("<b>Uploaded at <a href="http://stackoverflow.com/feeds/tag/" + s + "">" + s + "</a></b>"));
//textViewResponse.setMovementMethod(LinkMovementMethod.getInstance());
// here i am preparing the path so when the compress is done to save into.
}
}
if (null != absolute && absolute.length() > 0) {
int endIndex = absolute.lastIndexOf("/");
if (endIndex != -1) {
newstr = absolute.substring(endIndex, absolute.length()); // not forgot to put check if(endIndex != -1)
}
}
Log.w("Zipping", newstr);
final File videosdir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/videos/");
if (!videosdir.exists()) {
videosdir.mkdirs();
}
ZippedVideoPath = videosdir.getAbsolutePath() + "/" + newstr;
Log.w("Zipping", ZippedVideoPath);
// here i got the ffmpeg library from the net to compress the video and i'm preparing the commands
String[] complexCommand = {"-y", "-i", absolute, "-strict", "experimental", "-r", "25", "-vcodec", "mpeg4", "-b:a", "150k", "-ab", "48000", "-ac", "2", "-ar", "22050", ZippedVideoPath};
FFmpeg ffmpeg = FFmpeg.getInstance(getBaseContext());
try {
// to execute "ffmpeg -version" command you just need to pass "-version"
ffmpeg.execute(complexCommand, new ExecuteBinaryResponseHandler() {
@Override
public void onStart() {
Log.w("Zipping", "started");
}
@Override
public void onProgress(String message) {
}
@Override
public void onFailure(String message) {
Log.w("Zipping", message);
}
@Override
public void onSuccess(String message1) {
Log.w("Zipping","Success");
RelativeLayout v = (RelativeLayout) mEssageBox.findViewById(rowid.intValue());
Log.w("VideoView",v.toString());
ProgressBar progressBar = (ProgressBar) v.findViewById(R.id.message_entity_Right_progressbar);
ImageView iv = (ImageView) v.findViewById(R.id.message_entity_right_imageview);
// progressBar.setVisibility(View.GONE);
Bitmap bitTh = ThumbnailUtils.createVideoThumbnail(ZippedVideoPath, MediaStore.Images.Thumbnails.MINI_KIND);
iv.setImageBitmap(bitTh);
progressBar.setVisibility(View.GONE);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(ZippedVideoPath));
intent.setDataAndType(Uri.parse(ZippedVideoPath), "video/mp4");
startActivity(intent);
}
});
UploadVideo uv = new UploadVideo(v);
uv.execute();
}
@Override
public void onFinish() {
}
});
} catch (FFmpegCommandAlreadyRunningException e) {
Log.w("Zipping", e.toString());
}
}okay now to the problem when i call the findviewbyid for the progress bar in sendvideomessage ffmpeg onsuccess callback it returns null even though the findviewbyid for the the imageview which is in the same layout it returns the view ! so please tell me what is the problem
public void onSuccess(String message1) {
Log.w("Zipping","Success");
RelativeLayout v = (RelativeLayout) mEssageBox.findViewById(rowid.intValue()); ;
ProgressBar progressBar = (ProgressBar) v.findViewById(R.id.message_entity_Right_progressbar); // this keeps returning null!
ImageView iv = (ImageView) v.findViewById(R.id.message_entity_right_imageview); // returns the view
// progressBar.setVisibility(View.GONE);
Bitmap bitTh = ThumbnailUtils.createVideoThumbnail(ZippedVideoPath, MediaStore.Images.Thumbnails.MINI_KIND);
iv.setImageBitmap(bitTh);
progressBar.setVisibility(View.GONE);
iv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(ZippedVideoPath));
intent.setDataAndType(Uri.parse(ZippedVideoPath), "video/mp4");
startActivity(intent);
}
});
UploadVideo uv = new UploadVideo(v);
uv.execute();
}Thank you !
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av_video_decode2 RETURNS THE VALUE -1094995529 in the threaded function
24 mai 2014, par WhoamiI am developing rtsp streaming player, and followed the below approach.
1) Read packet, decode, display -> works perfectly.
while (1) {
if ( av_read_frame(pFormatCtx, &packet) >= 0) {
if (packet.stream_index == videoStream) {
retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if ( retDecoder <= 0)
LOGD (" Unable to Decode...retval %d ", retDecoder);
if (frameFinished) {
}
}
av_free_packet (&packet);
}
}Whereas,
I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.
My problem is while reading the same packet, and decode, i m unable to decode, the return value of the
av_video_decode2is-1094995529.Below is the short description of code. Kindly help to solve this issue ?.
AVPacketList *firstNode=NULL, *lastNode=NULL;
int pushPacket (AVPacket * pkt)
{
AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
newNode->pkt = *pkt;
newNode->next = NULL;
SDL_LockMutex (rwMutex);
if (lastNode != NULL ) {
lastNode->next = newNode;
lastNode = newNode;
} else {
firstNode = lastNode = newNode;
}
SDL_UnlockMutex (rwMutex);
}
int pullPacket ()
{
AVPacketList *tempNode;
AVPacket *pkt;
int res=0;
SDL_LockMutex (rwMutex);
if ( firstNode != NULL ) {
tempNode = firstNode;
*pkt = tempNode->pkt;
res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt); // HERE IS THE PROBLEM.
if (frameFinished) {
LOGD (" fRAME DECODED.. %d \n", counter++);
}
if (firstNode->next != NULL) {
firstNode = firstNode->next;
}
else {
firstNode = NULL;
lastNode = NULL;
}
av_free (tempNode);
}
}In Thread 1 :
int PacketReader (void *ptr)
{
AVPacket pkt1, *rpacket;
rpacket = &pkt1;
while (globalQuit != 0) {
if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
if (packet.stream_index == videoStream) {
pushPacket (rpacket);
}
av_free_packet(rpacket);
}
}
}In thread 2 :
while (1) {
pullPacket ();
} -
avcodec_decode_video2 RETURNS THE VALUE -1094995529 in the threaded function
2 février 2016, par WhoamiI am developing rtsp streaming player, and followed the below approach.
1) Read packet, decode, display -> works perfectly.
while (1) {
if ( av_read_frame(pFormatCtx, &packet) >= 0) {
if (packet.stream_index == videoStream) {
retDecoder = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if ( retDecoder <= 0)
LOGD (" Unable to Decode...retval %d ", retDecoder);
if (frameFinished) {
}
}
av_free_packet (&packet);
}
}Whereas,
I introduced two threads, one is reading and pushing into the queue and the second one is reading from the queue.
My problem is while reading the same packet, and decode, i m unable to decode, the return value of the
av_video_decode2is-1094995529.Below is the short description of code. Kindly help to solve this issue ?.
AVPacketList *firstNode=NULL, *lastNode=NULL;
int pushPacket (AVPacket * pkt)
{
AVPacketList *newNode = av_malloc(sizeof(AVPacketList));
newNode->pkt = *pkt;
newNode->next = NULL;
SDL_LockMutex (rwMutex);
if (lastNode != NULL ) {
lastNode->next = newNode;
lastNode = newNode;
} else {
firstNode = lastNode = newNode;
}
SDL_UnlockMutex (rwMutex);
}
int pullPacket ()
{
AVPacketList *tempNode;
AVPacket *pkt;
int res=0;
SDL_LockMutex (rwMutex);
if ( firstNode != NULL ) {
tempNode = firstNode;
*pkt = tempNode->pkt;
res = avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, pkt); // HERE IS THE PROBLEM.
if (frameFinished) {
LOGD (" fRAME DECODED.. %d \n", counter++);
}
if (firstNode->next != NULL) {
firstNode = firstNode->next;
}
else {
firstNode = NULL;
lastNode = NULL;
}
av_free (tempNode);
}
}In Thread 1 :
int PacketReader (void *ptr)
{
AVPacket pkt1, *rpacket;
rpacket = &pkt1;
while (globalQuit != 0) {
if ( av_read_frame(pFormatCtx, rpacket) >= 0) {
if (packet.stream_index == videoStream) {
pushPacket (rpacket);
}
av_free_packet(rpacket);
}
}
}In thread 2 :
while (1) {
pullPacket ();
}
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