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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (54)
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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. -
Initialisation de MediaSPIP (préconfiguration)
20 février 2010, parLors de l’installation de MediaSPIP, celui-ci est préconfiguré pour les usages les plus fréquents.
Cette préconfiguration est réalisée par un plugin activé par défaut et non désactivable appelé MediaSPIP Init.
Ce plugin sert à préconfigurer de manière correcte chaque instance de MediaSPIP. Il doit donc être placé dans le dossier plugins-dist/ du site ou de la ferme pour être installé par défaut avant de pouvoir utiliser le site.
Dans un premier temps il active ou désactive des options de SPIP qui ne le (...) -
Other interesting software
13 avril 2011, parWe don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
We don’t know them, we didn’t try them, but you can take a peek.
Videopress
Website : http://videopress.com/
License : GNU/GPL v2
Source code : (...)
Sur d’autres sites (2995)
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C++ ffmpeg lib version 7.0 - runtime error
1er septembre 2024, par Chris PI want to make a C++ lib named cppdub which will mimic the python module pydub.


One main function is to export the AudioSegment to a file with a specific format (example : mp3).


The code is :


void check_av_error(int error_code, const std::string& msg) {
 if (error_code < 0) {
 char errbuf[AV_ERROR_MAX_STRING_SIZE];
 av_strerror(error_code, errbuf, sizeof(errbuf));
 throw std::runtime_error(msg + ": " + errbuf);
 }
}

std::string av_err2str_(int errnum) {
 char buf[AV_ERROR_MAX_STRING_SIZE];
 av_strerror(errnum, buf, sizeof(buf));
 return std::string(buf);
}

void log_error(const std::string& msg) {
 std::cerr << "Error: " << msg << std::endl;
}

std::ofstream cppdub::AudioSegment::export_segment(
 std::string& out_f,
 const std::string& format,
 const std::string& codec,
 const std::string& bitrate,
 const std::vector& parameters,
 const std::map& tags,
 const std::string& id3v2_version,
 const std::string& cover) {

 av_log_set_level(AV_LOG_DEBUG);
 avformat_network_init();

 AVFormatContext* format_ctx = nullptr;
 int ret = avformat_alloc_output_context2(&format_ctx, nullptr, format.c_str(), out_f.c_str());
 check_av_error(ret, "Could not allocate format context");

 if (!(format_ctx->oformat->flags & AVFMT_NOFILE)) {
 ret = avio_open(&format_ctx->pb, out_f.c_str(), AVIO_FLAG_WRITE);
 check_av_error(ret, "Could not open output file");
 }

 AVStream* stream = avformat_new_stream(format_ctx, nullptr);
 if (!stream) {
 avformat_free_context(format_ctx);
 throw std::runtime_error("Could not allocate stream");
 }

 const AVCodec* codec_obj = avcodec_find_encoder_by_name(codec.c_str());
 if (!codec_obj) {
 avformat_free_context(format_ctx);
 throw std::runtime_error("Codec not found");
 }

 AVCodecContext* codec_ctx = avcodec_alloc_context3(codec_obj);
 if (!codec_ctx) {
 avformat_free_context(format_ctx);
 throw std::runtime_error("Could not allocate codec context");
 }

 codec_ctx->sample_rate = this->get_frame_rate();
 AVChannelLayout ch_layout_1;
 av_channel_layout_uninit(&ch_layout_1);
 av_channel_layout_default(&ch_layout_1, 2);
 codec_ctx->ch_layout = ch_layout_1; // Adjust based on your needs
 codec_ctx->bit_rate = std::stoi(bitrate);
 codec_ctx->sample_fmt = codec_obj->sample_fmts[0];

 if (format_ctx->oformat->flags & AVFMT_GLOBALHEADER) {
 codec_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
 }

 ret = avcodec_open2(codec_ctx, codec_obj, nullptr);
 check_av_error(ret, "Could not open codec");

 stream->time_base = { 1, codec_ctx->sample_rate };
 ret = avcodec_parameters_from_context(stream->codecpar, codec_ctx);
 check_av_error(ret, "Could not set codec parameters");

 ret = avformat_write_header(format_ctx, nullptr);
 check_av_error(ret, "Error occurred when writing header");

 AVPacket pkt;
 av_init_packet(&pkt);
 pkt.data = nullptr;
 pkt.size = 0;

 int frame_size = av_samples_get_buffer_size(nullptr, codec_ctx->ch_layout.nb_channels,
 codec_ctx->frame_size, codec_ctx->sample_fmt, 0);
 check_av_error(frame_size, "Could not calculate frame size");

 AVFrame* frame = av_frame_alloc();
 if (!frame) {
 avcodec_free_context(&codec_ctx);
 avformat_free_context(format_ctx);
 throw std::runtime_error("Error allocating frame");
 }

 frame->format = codec_ctx->sample_fmt;
 frame->ch_layout = codec_ctx->ch_layout;
 frame->sample_rate = codec_ctx->sample_rate;
 frame->nb_samples = codec_ctx->frame_size;

 ret = av_frame_get_buffer(frame, 0);
 if (ret < 0) {
 av_frame_free(&frame);
 avcodec_free_context(&codec_ctx);
 avformat_free_context(format_ctx);
 throw std::runtime_error("Error allocating frame buffer: " + av_err2str_(ret));
 }

 size_t data_offset = 0;

 while (data_offset < this->raw_data().size()) {
 int samples_to_process = std::min(frame_size, static_cast<int>(this->raw_data().size()) - static_cast<int>(data_offset));

 // Fill the frame with audio data
 ret = avcodec_fill_audio_frame(frame, codec_ctx->ch_layout.nb_channels, codec_ctx->sample_fmt,
 reinterpret_cast<const>(this->raw_data().data()) + data_offset,
 samples_to_process, 0);
 if (ret < 0) {
 log_error("Error filling audio frame: " + av_err2str_(ret));
 av_frame_free(&frame);
 avcodec_free_context(&codec_ctx);
 avformat_free_context(format_ctx);
 throw std::runtime_error("Error filling audio frame: " + av_err2str_(ret));
 }

 data_offset += samples_to_process;

 ret = avcodec_send_frame(codec_ctx, frame);
 if (ret < 0) {
 log_error("Error sending frame for encoding: " + av_err2str_(ret));
 av_frame_free(&frame);
 avcodec_free_context(&codec_ctx);
 avformat_free_context(format_ctx);
 throw std::runtime_error("Error sending frame for encoding: " + av_err2str_(ret));
 }

 while (ret >= 0) {
 ret = avcodec_receive_packet(codec_ctx, &pkt);
 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
 break;
 }
 check_av_error(ret, "Error receiving packet");

 pkt.stream_index = stream->index;

 ret = av_interleaved_write_frame(format_ctx, &pkt);
 check_av_error(ret, "Error writing encoded frame to output file");

 av_packet_unref(&pkt);
 }
 }

 // Flush the encoder
 avcodec_send_frame(codec_ctx, nullptr);
 while (avcodec_receive_packet(codec_ctx, &pkt) == 0) {
 pkt.stream_index = stream->index;
 av_interleaved_write_frame(format_ctx, &pkt);
 av_packet_unref(&pkt);
 }

 av_write_trailer(format_ctx);

 av_frame_free(&frame);
 avcodec_free_context(&codec_ctx);
 avformat_free_context(format_ctx);

 return std::ofstream(out_f, std::ios::binary);
}
</const></int></int>

The runtime error is :


Exception thrown at 0x00007FF945137C9B (avcodec-61.dll) in cppdub_test.exe : 0xC0000005 : Access violation reading location 0x0000024CBCD25080.


for line :


ret = avcodec_send_frame(codec_ctx, frame);


Call stack :


avcodec-61.dll!00007ff945137c9b() Unknown
 avcodec-61.dll!00007ff9451381bb() Unknown
 avcodec-61.dll!00007ff945139679() Unknown
 avcodec-61.dll!00007ff94371521d() Unknown
 avcodec-61.dll!00007ff9434a80c2() Unknown
 avcodec-61.dll!00007ff9434a84a6() Unknown
 avcodec-61.dll!00007ff9434a8749() Unknown
> cppdub_test.exe!cppdub::AudioSegment::export_segment(std::string & out_f, const std::string & format, const std::string & codec, const std::string & bitrate, const std::vector> & parameters, const std::map,std::allocator>> & tags, const std::string & id3v2_version, const std::string & cover) Line 572 C++
 cppdub_test.exe!main() Line 33 C++
 [External Code] 



Autos :


+ this 0x000000d3a08ff690 {data_="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0... ...} cppdub::AudioSegment *
+ bitrate "128000" const std::string &
+ ch_layout_1 {order=AV_CHANNEL_ORDER_NATIVE (1) nb_channels=2 u={mask=3 map=0x0000000000000003 {id=??? name=... opaque=...} } ...} AVChannelLayout
+ codec "libmp3lame" const std::string &
+ codec_ctx 0x0000024cbc78c240 {av_class=avcodec-61.dll!0x00007ff94789c760 {class_name=0x00007ff94789c740 "AVCodecContext" ...} ...} AVCodecContext *
+ codec_obj avcodec-61.dll!0x00007ff9477fa4c0 (load symbols for additional information) {name=0x00007ff9477fa47c "libmp3lame" ...} const AVCodec *
+ cover "" const std::string &
 data_offset 9216 unsigned __int64
+ format "mp3" const std::string &
+ format_ctx 0x0000024cbc788a40 {av_class=avformat-61.dll!0x00007ff99eb09fe0 {class_name=0x00007ff99eb09fc0 "AVFormatContext" ...} ...} AVFormatContext *
+ frame 0x0000024cbc787380 {data=0x0000024cbc787380 {0x0000024cbcd25080 <error reading="reading" characters="characters" of="of">, ...} ...} AVFrame *
 frame_size 9216 int
+ id3v2_version "4" const std::string &
+ out_f "ha-ha-ha.mp3" std::string &
+ parameters { size=0 } const std::vector> &
+ pkt {buf=0x0000000000000000 <null> pts=-9223372036854775808 dts=-9223372036854775808 ...} AVPacket
 ret 9216 int
 samples_to_process 9216 int
+ stream 0x0000024cbc789bc0 {av_class=avformat-61.dll!0x00007ff99eb09840 {class_name=0x00007ff99eb09820 "AVStream" ...} ...} AVStream *
+ tags { size=0 } const std::map,std::allocator>> &
</null></error>

-
FFmpeg 6.0 won't work because the header files can't connect or interact with each other. How do I fix the files ?
11 septembre 2023, par Señor TontoI am creating a win32 API C++ application with Microsoft Visual Studio 2022 in a .sln file. I've got quite far in basic functionalities & decided to try out video decoding & playing ; I've practiced this before but not with C++. So, I looked to see good libraries & found FFmpeg. Of course, I thought this would be quite straightforward - just import the headers & code, right ? No. Firstly, the FFmpeg I'm using is one of the pre-built binaries. The 'ffmpeg-master-latest-win64-gpl-shared.zip' From the BtbN Github repository. I decompressed it with WinRar & placed the files in Program Files (x86). Later on, I realised my mistake of placing it with 32-bit programs since it's a 64-bit build. So I transferred it to Program Files. Even after this though my issue persists. The issue being that the .h files of FFmpeg cannot communicate with each other. For some reason, they can't navigate to where the header files are. I am quite sure the reason for this may have something to do with where I save the files, the directory. Nowhere on the FFmpeg website can I see where you're expected to have the file directory at. I am sure there's a preset file path that is expected. Maybe I've named the FFmpeg folder incorrectly ? Or maybe it's not meant to go in Program Files ? The current directory for the FFmpeg folder for me is : C :\Program Files\FFmpeg. Below I will provide pictures of the errors I get where the code can't connect to other .h files as well as the file path. I'll also provide my code.


#include //imports the main win32 API library
#include //imports macros for handling Unicode & ASCII char sets
#include //defines the common control classes
#include //imports the standard C library
#include 
#include 
#include <iostream>
#include <fstream>
#include <string>

extern "C"
{
#include 
#include 
#include 
#include 
}

#pragma comment(lib, "Comctl32.lib") //tells the linker to include Comctl32.lib in the .exe
#pragma comment(lib, "C:\\Program Files\\FFmpeg\\lib\\avcodec.lib")
#pragma comment(lib, "C:\\Program Files\\FFmpeg\\lib\\avformat.lib")
#pragma comment(lib, "C:\\Program Files\\FFmpeg\\lib\\avutil.lib")
#pragma comment(lib, "C:\\Program Files\\FFmpeg\\lib\\swscale.lib")

#define EDIT_CONTROL 1
#define OPEN_FILE_BTN 2
#define SAVE_FILE_BTN 3
#define EMBOLDEN_BTN 4
#define ITALICISE_BTN 5
#define SCROLL_CONTAINER 6
#define FILEMENU_OPEN_FILE_BTN 7
#define ADD_ROW_BTN 8
#define CELL_1_ID 9
#define CELL_2_ID 10
#define CELL_3_ID 11
#define SCROLL_CONTAINER_TBL 12
// 946 0759 0609 | 163 739

HINSTANCE g_hInstance;
HWND g_hWndMain, g_hWndTabs, openFileBtn, saveFileBtn, hOpenFileEdit, hScrollContainer, hEditControl, tabHandle, emboldenBtn, italiciseBtn, FilemenuOpenFileBtn, tableContainer, tblHeaderOne,
tblHeaderTwo, tblHeaderThree, addRowBtn, hAddRowDialogue, hWnd, hWndCell1Label, hWndCell1Edit, hWndCell2Label, hWndCell2Edit, hWndCell3Label, hWndCell3Edit, hWndOkButton, hWndCancelButton, hRow, hCell1, hCell2, hCell3,
hWMP, OpenMp4Btn, hWMPContainer, hPlayBtn;
HMENU hMenu, hSubMenu;
bool isBold = false, isItalic = false;


const int startX = 0;
const int startY = 60;
const int ROW_HEIGHT = 20;
const int CELL_WIDTH = 110;
static int numRows = 1;
static int numCols = 3;

LRESULT CALLBACK WindowProcessMessages(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
INT_PTR CALLBACK AddRowDlgProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam);

int WINAPI wWinMain(
 _In_ HINSTANCE currentInstance,
 _In_opt_ HINSTANCE previousInstance,
 _In_ LPWSTR cmdLine,
 _In_ int cmdCount)
{
 const wchar_t* CLASS_NAME = L"Windows App";
 WNDCLASS wc{};
 wc.hInstance = currentInstance;
 wc.lpszClassName = CLASS_NAME;
 wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
 wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
 wc.lpfnWndProc = WindowProcessMessages;
 RegisterClass(&wc);

 g_hWndMain = CreateWindow(CLASS_NAME, L"Windows App",
 WS_OVERLAPPEDWINDOW,
 CW_USEDEFAULT, CW_USEDEFAULT,
 800, 600,
 nullptr, nullptr, nullptr, nullptr);

 if (g_hWndMain == NULL) {
 return 0;
 }

 // Initialize common controls
 INITCOMMONCONTROLSEX icex;
 icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
 icex.dwICC = ICC_TAB_CLASSES;
 InitCommonControlsEx(&icex);

 // Create tab control
 g_hWndTabs = CreateWindow(WC_TABCONTROL, L"",
 WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE | TCS_SINGLELINE,
 0, 0, 800, 600,
 g_hWndMain, nullptr, currentInstance, nullptr);

 if (g_hWndTabs == NULL) {
 return 0;
 }

 // Add tabs to tab control, seperate tab later
 TCITEM tcitem;
 tcitem.mask = TCIF_TEXT;

 wchar_t buf1[] = L"Table View";
 tcitem.pszText = buf1;
 TabCtrl_InsertItem(g_hWndTabs, 0, &tcitem);

 wchar_t buf2[] = L"Text Files";
 tcitem.pszText = buf2;
 TabCtrl_InsertItem(g_hWndTabs, 1, &tcitem);

 wchar_t buf3[] = L"mp4 Files";
 tcitem.pszText = buf3;
 TabCtrl_InsertItem(g_hWndTabs, 2, &tcitem);



 //original location of button intitialisation


 ShowWindow(g_hWndMain, SW_SHOWDEFAULT);
 UpdateWindow(g_hWndMain);

 MSG msg{};
 while (GetMessage(&msg, nullptr, 0, 0)) {
 TranslateMessage(&msg);
 DispatchMessage(&msg);
 }
 return 0;
}

</string></fstream></iostream>

I severely doubt my code has anything to do with the issue though. It's probably directory-based. I just placed wWinmain here to keep with the character limit.





-
Measuring success for your SEO content
20 mars 2020, par Jake Thornton — UncategorizedWith over a billion searches every day in search engines, it’s hard to underestimate the importance of having your business present on page one (ideally in positions 1 – 3) ranking for the keywords that impact your sales and conversions.
"In 2019, Google received nearly 2.3 trillion searches and on page one alone, the first five organic results accounted for 67.60% of all the clicks."
So how is your business performing when it comes to ranking in the crucial top three spots of search for your most important keywords ?
Accurately measuring the success of your content
Once you’ve done your keyword research, created compelling content, optimised it to be search-friendly, and hit ‘publish’, you then need to accurately measure the success of your efforts.
4 tips for measuring the success of your SEO content
1. Create a custom segment for "Visitors from Search Engines only"
By creating this custom segment, you’ll be able to analyse the behavioural patterns of the visitors who found your website through a search engine.
This way you can use many of Matomo’s powerful features (Visitors, Behaviour, Acquisition, Ecommerce, Goals etc.) focused entirely on search engine visitors only.
Once you’ve created this segment, you can begin to see key metrics like which entry pages are responsible for referring visitors to your website. For example : Visit Behaviour – Entry Pages, this is a great way to analyse your most effective SEO pages.You may be surprised at what pages currently bring in the most traffic.
As well as discovering which content resonates with your search audience, you will also be able to create more content focused on your targeted audience. Do this by learning which locations your search visitors are from, which device they use, what time of the day they visited your website and much more.
2. Website visits, time on site, pages per session, and bounce rate.
“The top four ranking factors are website visits, time on site, pages per session, and bounce rate.”
These four metrics set the benchmark for your SEO success.
First, you need to get as many of the ‘right’ users to see your content. If you feel you’ve exhausted channels such as social media, email and possibly paid posts ; think about who your ideal audience is. Where are they likely to hang out online ? Are there community groups or forum sites that are interested in what you’re writing about ?
Whatever the case, putting yourself out there and getting more traffic to your website will help show search engines that people are interested in your website. As a result, they’ll likely rank you higher for that.
When we say getting more of the ‘right’ users, we mean users who are generally interested in the topic/subject you’re writing about and interested in the work you do.
This is important for the next three metrics – increasing users time on your website, increasing the amount of pages your users explore on your website, and reducing the overall bounce rate for users who leave your website in a matter of seconds.
To evaluate these metrics, go to Behaviour – Pages in your Matomo and see how these metrics vary on previous posts or pages you’ve created. Which pages are already showing you the best results ? Why do they get the results ? Can you focus on creating more content like this ?
Understanding what content is resonating with your users through these metrics is easy and is the starting point for measuring the success of your SEO content strategy.
3. Row Evolution
The Row Evolution feature embedded within the Search Engine Keywords Performance plugin lets you see how your ranking positions have changed over time for your important keywords. It also lets you see how the incoming traffic, related to your keywords, has changed over time.
This is valuable when measuring the changes you’ve made to your landing pages to see if it has a positive or negative effect on your ranking efforts.
This also lets you see how search engine algorithm changes affect your search rankings over time, and to see if the effects of these algorithm updates are temporary or long lasting.
Row evolution allows you to report on keyword performance with ease. If you only check your insights once a week or once a fortnight, you’ll see how ranking positions for your important keywords have changed daily (or even weekly, monthly or yearly however you prefer.)
4. What results are you getting from the lesser known search engines ?
"In 2019 (to date), Google accounted for just over 75% of all global desktop search traffic, followed by Bing at 9.97%, Baidu at 9.34%, and Yahoo at 2.77%."
For most of us, we want to be ranking in the top three spots in Google Search because that’s where the majority of search users are. However, don’t shy away from opportunities you could be missing with lesser known search engines.
If you sell a product aimed at 55-65 year olds who use a PC computer, chances are they are using Bing. If you have customers in China the majority will be using Baidu, or in our case at Matomo, many of our loyal users use a privacy-friendly search engine like DuckDuckGo or Qwant.
Some of your ideal customers might be finding you through these alternative search engines, so be sure to measure the impact that these referrals may have on your conversions.
Strategically including important keywords that impact your business
While search is an important acquisition channel for most businesses, it’s also one of the most competitive.
We recommend analysing your keyword and content performance regularly and alter content that isn’t performing as well as you’d like. You need to continually learn from the content that is successful, and focus on creating more content like this.
The final thing to remember with search keyword performance is to be patient. If you have had little success in the past with attracting customers through search, it can take time to build this reputation with search engines.
Syndiquer tout le site
