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Autres articles (37)
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Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
(Dés)Activation de fonctionnalités (plugins)
18 février 2011, parPour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
MediaSPIP est fourni par défaut avec l’ensemble des plugins dits "compatibles", ils ont été testés et intégrés afin de fonctionner parfaitement avec chaque (...) -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
Sur d’autres sites (4918)
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FFmpeg memory leak
10 septembre 2015, par SpamdarkI have developed just a simple library modifing a library that I found on the internet.
What scares me, is that, when I play an avi, it plays and free the memory when the video ends, but when I play the video, it’s like a memory leak ! It grows to 138mb although the video has ended and the FreeAll method (A function that deletes the context, etc...) has been called.
Here is the code of the method that is causing the memory leak :
int VideoGL::NextVideoFrame(){
int frameDone = 0;
int result = 0;
double pts = 0;
if(!this->ended){
if (!_started) return 0;
AVPacket* packet;
// Get the number of milliseconds passed and see if we should display a new frame
int64_t msPassed = (1000 * (clock() - _baseTime)) / CLOCKS_PER_SEC;
if (msPassed >= _currentPts)
{
// If this is not the current frame, copy it to the buffer
if (_currentFramePts != _currentPts){
_currentFramePts = _currentPts;
memcpy(buffer_a,buffer, 3 * _codec_context_video->width * _codec_context_video->height);
result = 1;
}
// Try to load a new frame from the video packet queue
bool goodop=false;
AVFrame *_n_frame = avcodec_alloc_frame();
while (!frameDone && (packet = this->DEQUEUE(VIDEO)) != NULL)
{
if (packet == (AVPacket*)-1) return -1;
goodop=true;
_s_pts = packet->pts;
avcodec_decode_video2(_codec_context_video, _n_frame, &frameDone, packet);
av_free_packet(packet);
if (packet->dts == AV_NOPTS_VALUE)
{
if (_n_frame->opaque && *(uint64_t*)_n_frame->opaque != AV_NOPTS_VALUE) pts = (double) *(uint64_t*)_n_frame->opaque;
else pts = 0;
}
else pts = (double) packet->dts;
pts *= av_q2d(_codec_context_video->time_base);
}
if (frameDone)
{
// if a frame was loaded scale it to the current texture frame buffer, but also set the pts so that it won't be copied to the texture until it's time
sws_scale(sws_ctx,_n_frame->data, _n_frame->linesize, 0, _codec_context_video->height, _rgb_frame->data, _rgb_frame->linesize);
double nts = 1.0/av_q2d(_codec_context_video->time_base);
_currentPts = (uint64_t) (pts*nts);
}
avcodec_free_frame(&_n_frame);
av_free(_n_frame);
if(!goodop){
ended=true;
}
}
}
return result;
}I’ll be waiting for answers, thanks.
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Android how to increase ffmpeg mp4 perfromance ?
4 janvier 2013, par testCoderI have detected that function
avcodec_decode_audio3
works slow with mp4 format, here my code cycle for decoding audio :while (av_read_frame(av_format_context, &packet) >= 0 && is_play == 1) {
if (av_codec_context->codec_type == AVMEDIA_TYPE_AUDIO
&& is_play == 1) {
int out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
int size = packet.size;
int n;
int dataLength = size;
int decoded = 0;
while (size > 0) {
//start measure time
gettimeofday(&tvBegin, NULL);
int len = avcodec_decode_audio3(av_codec_context,
(int16_t *) pAudioBuffer, &out_size, &packet);
//stop measure time
gettimeofday(&tvEnd, NULL);
timeval_subtract(&tvDiff, &tvEnd, &tvBegin);
LOGI("%d", tvDiff.tv_usec / 1000);
LOGI("len='%d'", len);
LOGI("out_size='%d'", out_size);
if (len < 0) {
break;
return 1;
}
if (out_size > 0) {
jbyte *bytes = (*env)->GetByteArrayElements(env, array,
NULL);
memcpy(bytes, (int16_t *) pAudioBuffer, out_size);
(*env)->ReleaseByteArrayElements(env, array, bytes, 0);
(*env)->CallVoidMethod(env, obj, play, array, out_size,
is_play);
}
size -= len;
}
}
if (packet.data)
av_free_packet(&packet);
}But with other formats like flac and mp3 it works fine.
avcodec_decode_audio3
take about 1-2 milisecounds for decoding mp3 frame without_size
= 4608 but with the same frame size in mp4 decoding take about 6-7 millisecounds. I got my build script from here.Does it normal behavior ? Is any way to increase performance of decoding mp4 ?
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close the running application in vb.net from background
22 janvier 2016, par TOMi want to stop the running (ffmpeg) process from background . i use the
process.kill()
i wrote the code . but in this process the output file is getting corrupted.
Dim pProcess() As Process = Process.GetProcesses
For Each p As Process In pProcess
If p.ProcessName = "ffmpeg" Then
p.WaitForExit(1000)
p.Kill()
p.Close()
End If
Nextis there any other method to terminate the process without file being corrupt
thanks