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Médias (1)
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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (44)
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MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...) -
Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)
Sur d’autres sites (6002)
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Museum of Multimedia Software, Part 2
16 août 2010, par Multimedia Mike — Software MuseumThis installment includes a bunch of old, discontinued Adobe software as well as some Flash-related mutlimedia software.
Screen Time for Flash Screen Saver Factory
"Create High Impact Screen Savers Using Macromedia Flash."
Requirements include Windows 3.1, 95 or NT 3.5.1. A 486 computer is required to play the resulting screensavers which are Flash projectors using Macromedia Flash 3.0.
Monster Interactive Instant GUI 2
Create eye-popping GUIs more easily for use in Flash. Usability experts would argue that this is not a good thing.
Adobe Dimensions 3.0
"The Easy Yet Powerful 3D Rendering Tool." This software was end-of-life’d in late 2004-early 2005 (depending on region).
Adobe ImageStyler
"Instantly add style to your Web site." Wikipedia claims that this product was sold from 1998 to 2000 when it was superseded by Adobe LiveMotion (see below).
Google is able to excavate a link to the Latin American site for Adobe ImageStyler, a page that doesn’t seem to be replicated in any other language.
Adobe LiveMotion
"Professional Web graphics and animation." This is version 1, where the last version was #2, released in 2002.
Adobe Streamline 4.0
"The most powerful way to convert images into line art." This was discontinued in mid-2005.
Adobe SuperATM
"The magic that maintains the look of your documents." This is the oldest item in my collection. A close examination of the back of the box reveals an old Adobe logo. The latest copyright date on the box is 1992.
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"wrong sample count" When reading MP4 files using OpenCV
26 octobre 2022, par Object UnknownI want to marge some mp4 videos using OpenCV library, but when I try to read those videos using
cv::VideoCapture, it outputs like that :

[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AAE9D80] co located POCs unavailable
[h264 @ 000001EB9AAE7D80] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A128600] co located POCs unavailable
[h264 @ 000001EB9A129840] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB9AA28E40] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A169B00] co located POCs unavailable
[h264 @ 000001EB9A16B680] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB960CD680] co located POCs unavailable
[h264 @ 000001EB960CC8C0] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81DDC0] co located POCs unavailable
[h264 @ 000001EB9A81B000] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB960CB200] co located POCs unavailable
[h264 @ 000001EB960CBFC0] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB99F206C0] co located POCs unavailable
[h264 @ 000001EB99F20B40] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81D480] co located POCs unavailable
[h264 @ 000001EB9A81B000] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AD02C00] co located POCs unavailable
[h264 @ 000001EB9AD02300] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81B480] co located POCs unavailable
[h264 @ 000001EB9A81B940] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AD02780] co located POCs unavailable
[h264 @ 000001EB9AD01E40] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count


and just exited with exit value 0. I want to know why it is reporting this and how to solve it please.


Heres my demo code :


#include <string>
#include <iostream>
#include <opencv2></opencv2>core/core.hpp>
#include <opencv2></opencv2>video/video.hpp>
#include <opencv2></opencv2>imgproc/imgproc.hpp>
#include <opencv2></opencv2>videoio/videoio.hpp>
#include <opencv2></opencv2>highgui/highgui.hpp>

int main()
{
 cv::Mat frame;
 cv::VideoCapture vcap;
 for (int i = 1; i <= 60; i++)
 {
 if (!vcap.open("G:\\Users\\15819\\Desktop\\Demo\\demo (" + std::to_string(i) + ").mp4"))
 {
 std::cout << "Failed to Open File: demo (" << i << ").mp4" << std::endl;
 continue;
 }
 while (!vcap.read(frame))
 cv::imshow("video", frame);
 }
 return 0;
}
</iostream></string>

I installed the
OpenCVandFFmpeglibrary usingvcpkg, here's the library information (displayed byvcpkg listcommand) :

ffmpeg:x64-windows 4.4.1#21 a library to decode, encode, transcode, mux, dem...
ffmpeg:x86-windows 4.4.1#21 a library to decode, encode, transcode, mux, dem...
ffmpeg[avcodec]:x64-windows Build the avcodec library
ffmpeg[avcodec]:x86-windows Build the avcodec library
ffmpeg[avdevice]:x64-windows Build the avdevice library
ffmpeg[avdevice]:x86-windows Build the avdevice library
ffmpeg[avfilter]:x64-windows Build the avfilter library
ffmpeg[avfilter]:x86-windows Build the avfilter library
ffmpeg[avformat]:x64-windows Build the avformat library
ffmpeg[avformat]:x86-windows Build the avformat library
ffmpeg[openh264]:x64-windows H.264 de/encoding via openh264
ffmpeg[openh264]:x86-windows H.264 de/encoding via openh264
ffmpeg[swresample]:x64-windows Build the swresample library
ffmpeg[swresample]:x86-windows Build the swresample library
ffmpeg[swscale]:x64-windows Build the swscale library
ffmpeg[swscale]:x86-windows Build the swscale library
opencv4:x64-windows 4.6.0#6 computer vision library
opencv4:x86-windows 4.6.0#6 computer vision library
opencv4[default-features]:x64-windows Platform-dependent default features
opencv4[default-features]:x86-windows Platform-dependent default features
opencv4[dnn]:x64-windows Enable dnn module
opencv4[dnn]:x86-windows Enable dnn module
opencv4[ffmpeg]:x64-windows ffmpeg support for opencv
opencv4[ffmpeg]:x86-windows ffmpeg support for opencv
opencv4[jpeg]:x64-windows JPEG support for opencv
opencv4[jpeg]:x86-windows JPEG support for opencv
opencv4[png]:x64-windows PNG support for opencv
opencv4[png]:x86-windows PNG support for opencv
opencv4[qt]:x64-windows Qt GUI support for opencv
opencv4[qt]:x86-windows Qt GUI support for opencv
opencv4[quirc]:x64-windows Enable QR code module
opencv4[quirc]:x86-windows Enable QR code module
opencv4[tiff]:x64-windows TIFF support for opencv
opencv4[tiff]:x86-windows TIFF support for opencv
opencv4[webp]:x64-windows WebP support for opencv
opencv4[webp]:x86-windows WebP support for opencv
opencv:x64-windows 4.6.0 Computer vision library
opencv:x86-windows 4.6.0 Computer vision library
opencv[default-features]:x64-windows Platform-dependent default features
opencv[default-features]:x86-windows Platform-dependent default features
opencv[dnn]:x64-windows Enable dnn module
opencv[dnn]:x86-windows Enable dnn module
opencv[jpeg]:x64-windows JPEG support for opencv
opencv[jpeg]:x86-windows JPEG support for opencv
opencv[png]:x64-windows PNG support for opencv
opencv[png]:x86-windows PNG support for opencv
opencv[quirc]:x64-windows Enable QR code module
opencv[quirc]:x86-windows Enable QR code module
opencv[tiff]:x64-windows TIFF support for opencv
opencv[tiff]:x86-windows TIFF support for opencv
opencv[webp]:x64-windows WebP support for opencv
opencv[webp]:x86-windows WebP support for opencv


Other Environments :


OS: Windows 11 x64 Professional Workstation
IDE: Visual Studio 2022
Project C++ Standard: C++14
Project Platform: x64 Release


-
value of got_picture_ptr is always 0. when use avcodec_decode_video2()
4 septembre 2014, par user3867261I’m using visual studio 2013 professional.
below code is simple decode tutorial using ffmpeg.
///> Include FFMpeg
extern "C" {
#include <libavformat></libavformat>avformat.h>
}
///> Library Link On Windows System
#pragma comment( lib, "avformat.lib" )
#pragma comment( lib, "avutil.lib" )
#pragma comment( lib, "avcodec.lib" )
static void write_ascii_frame(const char *szFileName, const AVFrame *pVframe);
int main(void)
{
const char *szFilePath = "C:\\singlo\\example.avi";
///> Initialize libavformat and register all the muxers, demuxers and protocols.
av_register_all();
///> Do global initialization of network components.
avformat_network_init();
int ret;
AVFormatContext *pFmtCtx = NULL;
///> Open an input stream and read the header.
ret = avformat_open_input( &pFmtCtx, szFilePath, NULL, NULL );
if( ret != 0 ) {
av_log( NULL, AV_LOG_ERROR, "File [%s] Open Fail (ret: %d)\n", ret );
exit( -1 );
}
av_log( NULL, AV_LOG_INFO, "File [%s] Open Success\n", szFilePath );
av_log( NULL, AV_LOG_INFO, "Format: %s\n", pFmtCtx->iformat->name );
///> Read packets of a media file to get stream information.
ret = avformat_find_stream_info( pFmtCtx, NULL );
if( ret < 0 ) {
av_log( NULL, AV_LOG_ERROR, "Fail to get Stream Information\n" );
exit( -1 );
}
av_log( NULL, AV_LOG_INFO, "Get Stream Information Success\n" );
///> Find Video Stream
int nVSI = -1;
int nASI = -1;
int i;
for( i = 0 ; i < pFmtCtx->nb_streams ; i++ ) {
if( nVSI < 0 && pFmtCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO ) {
nVSI = i;
}
else if( nASI < 0 && pFmtCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO ) {
nASI = i;
}
}
if( nVSI < 0 && nASI < 0 ) {
av_log( NULL, AV_LOG_ERROR, "No Video & Audio Streams were Found\n");
exit( -1 );
}
///> Find Video Decoder
AVCodec *pVideoCodec = avcodec_find_decoder( pFmtCtx->streams[nVSI]->codec->codec_id );
if( pVideoCodec == NULL ) {
av_log( NULL, AV_LOG_ERROR, "No Video Decoder was Found\n" );
exit( -1 );
}
///> Initialize Codec Context as Decoder
if( avcodec_open2( pFmtCtx->streams[nVSI]->codec, pVideoCodec, NULL ) < 0 ) {
av_log( NULL, AV_LOG_ERROR, "Fail to Initialize Decoder\n" );
exit( -1 );
}
///> Find Audio Decoder
AVCodec *pAudioCodec = avcodec_find_decoder( pFmtCtx->streams[nASI]->codec->codec_id );
if( pAudioCodec == NULL ) {
av_log( NULL, AV_LOG_ERROR, "No Audio Decoder was Found\n" );
exit( -1 );
}
///> Initialize Codec Context as Decoder
if( avcodec_open2( pFmtCtx->streams[nASI]->codec, pAudioCodec, NULL ) < 0 ) {
av_log( NULL, AV_LOG_ERROR, "Fail to Initialize Decoder\n" );
exit( -1 );
}
AVCodecContext *pVCtx = pFmtCtx->streams[nVSI]->codec;
AVCodecContext *pACtx = pFmtCtx->streams[nASI]->codec;
AVPacket pkt;
AVFrame* pVFrame, *pAFrame;
int bGotPicture = 0; // flag for video decoding
int bGotSound = 0; // flag for audio decoding
int bPrint = 0; // ë¹ëì¤ ì²« ì¥ë©´ë§ íì¼ë¡ ë¨ê¸°ê¸° ìí ìì flag ìëë¤
pVFrame = avcodec_alloc_frame();
pAFrame = avcodec_alloc_frame();
while( av_read_frame( pFmtCtx, &pkt ) >= 0 ) {
///> Decoding
if( pkt.stream_index == nVSI ) {
if( avcodec_decode_video2( pVCtx, pVFrame, &bGotPicture, &pkt ) >= 0 ) {
///////////////////////problem here/////////////////////////////////////////////
if( bGotPicture ) {
///> Ready to Render Image
av_log( NULL, AV_LOG_INFO, "Got Picture\n" );
if( !bPrint ) {
write_ascii_frame( "output.txt", pVFrame );
bPrint = 1;
}
}
}
// else ( < 0 ) : Decoding Error
}
else if( pkt.stream_index == nASI ) {
if( avcodec_decode_audio4( pACtx, pAFrame, &bGotSound, &pkt ) >= 0 ) {
if( bGotSound ) {
///> Ready to Render Sound
av_log( NULL, AV_LOG_INFO, "Got Sound\n" );
}
}
// else ( < 0 ) : Decoding Error
}
///> Free the packet that was allocated by av_read_frame
av_free_packet( &pkt );
}
av_free( pVFrame );
av_free( pAFrame );
///> Close an opened input AVFormatContext.
avformat_close_input( &pFmtCtx );
///> Undo the initialization done by avformat_network_init.
avformat_network_deinit();
return 0;
}
static void write_ascii_frame(const char *szFileName, const AVFrame *frame)
{
int x, y;
uint8_t *p0, *p;
const char arrAsciis[] = " .-+#";
FILE* fp = fopen( szFileName, "w" );
if( fp ) {
/* Trivial ASCII grayscale display. */
p0 = frame->data[0];
for (y = 0; y < frame->height; y++) {
p = p0;
for (x = 0; x < frame->width; x++)
putc( arrAsciis[*(p++) / 52], fp );
putc( '\n', fp );
p0 += frame->linesize[0];
}
fflush(fp);
fclose(fp);
}
}there is a problem in below part
if( avcodec_decode_video2( pVCtx, pVFrame, &bGotPicture, &pkt ) >= 0 ) {
///////////////////////problem here/////////////////////////////////////////////
if( bGotPicture ) {
///> Ready to Render Image
av_log( NULL, AV_LOG_INFO, "Got Picture\n" );
if( !bPrint ) {
write_ascii_frame( "output.txt", pVFrame );
bPrint = 1;
}
}
}the value of bGotPicture is always 0.. So i can’t decode video
plz help me.
where do problem occurs from ? in video ? in my code ?
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