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  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

Sur d’autres sites (6529)

  • To all Matomo plugin developers : Matomo 5 is coming, make your plugin compatible now

    5 mai 2023, par Matomo Core Team — Development

    We’re planning to release the first beta of Matomo 5 in a few weeks. For making it easy for Matomo users to be able to upgrade to this beta, it would be great to have as many plugins on the Marketplace as possible already updated and compatible with Matomo 5. Then many users would be able to upgrade to the first beta without any issues.

    Presumably, as you put your plugin on our Marketplace, you want people to use it. Making your plugin compatible with Matomo 5 helps ensure that people will be able to find and keep using your plugin. If your plugin is not compatible with Matomo 5, your plugin will be automatically deactivated in Matomo 5 instances. We’ll be happy to help you achieve compatibility should there be any issue.

    How do I upgrade my Matomo instance to Matomo 5 ?

    If you have installed your Matomo development environment through git, you can simply checkout the Matomo 5 branch “5.x-dev” and install its dependencies by executing these commands :

    • git checkout 5.x-dev
    • composer install

    Alternatively, you can also download the latest version directly from GitHub as a zip file and run composer install afterwards.

    How do I upgrade my plugin to Matomo 5 ?

    While there are some breaking changes in Matomo 5, most of our Platform APIs remain unchanged, and almost all changes are for rarely used APIs. Quite often, making your plugin compatible with Matomo 5 will just be a matter of adjusting the “plugin.json” file (as mentioned in the migration guide).

    You can find all developer documentation on our developer zone which has already been updated for Matomo 5.

    How do I know my plugin changes were released successfully ?

    If you have configured an email address within your “plugin.json” file, then you will receive a confirmation or an error email within a few minutes. Alternatively, you can also check out your plugin page on the Marketplace directly. If the plugin release was successful, you will see additional links below the download button showing which versions your plugin is compatible with.

    what it looks like when your plugin is compatible with multiple Matomo versions

    How can switch between Matomo 4 and Matomo 5 or downgrade to Matomo 4 ?

    To downgrade from Matomo 5 to Matomo 4 in your Matomo development environment :

    • check out the “4.x-dev” branch 
    • run “composer install” as usual

    When will the final Matomo 5 release be available ?

    We estimate the final stable Matomo 5.0.0 release will be released in approx. 2-3 months.

    What is new in Matomo 5 ?

    We don’t have a summary of the changes available just yet but you can see all closed issues within this release here.

    Any questions or need help ?

    If you have any questions, or experience any problems during the migration, don’t hesitate to get in touch with us. We’ll be happy to help get your plugin compatible and the update published. If you find any undocumented breaking change or find any step during the migration process not clear, please let us know as well.

    Thank you for contributing a plugin to the Marketplace and making Matomo better. We really appreciate your work !

  • Dockerized ffmpeg stops for no reason

    2 mai 2023, par Arthur Attout

    I'm trying to fire up a container that reads a video stream via ffmpeg and saves the stream as 30 seconds segments.

    


    When I run the container, it stops after 20-ish seconds and returns with no error.

    


    Here is my Dockerfile

    


    FROM linuxserver/ffmpeg
ENTRYPOINT ffmpeg -i rtsp://192.168.1.85:8554/camera -f v4l2 -c copy -reset_timestamps 1 -map 0 -f segment -segment_time 30 -segment_format mp4 "output/out%03d.mp4" -loglevel debug


    


    Here is the output when I run sudo docker run -it --rm -v /data/camera:/output --name camera_recorder camera_recorder:latest

    


    [+] Building 1.8s (5/5) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                                                                                                                                      0.3s
 => => transferring dockerfile: 777B                                                                                                                                                                                                                                      0.0s
 => [internal] load .dockerignore                                                                                                                                                                                                                                         0.5s
 => => transferring context: 2B                                                                                                                                                                                                                                           0.0s
 => [internal] load metadata for docker.io/linuxserver/ffmpeg:latest                                                                                                                                                                                                      1.2s
 => CACHED [1/1] FROM docker.io/linuxserver/ffmpeg@sha256:823c611e0af82b864608c21d96bf363403310d92f154e238f6d51fe3d783e53b                                                                                                                                                0.0s
 => exporting to image                                                                                                                                                                                                                                                    0.1s
 => => exporting layers                                                                                                                                                                                                                                                   0.0s
 => => writing image sha256:f0509ccf0b07ff53d4aafa0d3b80fd50ed53e96db906c9a1e0e8c44e163dce94                                                                                                                                                                              0.1s
 => => naming to docker.io/library/camera_recorder                                                                                                                                                                                                                        0.0s
ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
  configuration: --disable-debug --disable-doc --disable-ffplay --enable-ffprobe --enable-cuvid --enable-gpl --enable-libaom --enable-libass --enable-libfdk_aac --enable-libfreetype --enable-libkvazaar --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libxml2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-nonfree --enable-nvdec --enable-nvenc --enable-opencl --enable-openssl --enable-small --enable-stripping --enable-vaapi --enable-vdpau --enable-version3
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'rtsp://192.168.1.85:8554/camera'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'v4l2'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-reset_timestamps' ... matched as AVOption 'reset_timestamps' with argument '1'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'segment'.
Reading option '-segment_time' ... matched as AVOption 'segment_time' with argument '30'.
Reading option '-segment_format' ... matched as AVOption 'segment_format' with argument 'mp4'.
Reading option 'output/out%03d.mp4' ... matched as output url.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url rtsp://192.168.1.85:8554/camera.
Successfully parsed a group of options.
Opening an input file: rtsp://192.168.1.85:8554/camera.
[tcp @ 0x55c15e3eb040] No default whitelist set
[tcp @ 0x55c15e3eb040] Original list of addresses:
[tcp @ 0x55c15e3eb040] Address 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Interleaved list of addresses:
[tcp @ 0x55c15e3eb040] Address 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Starting connection attempt to 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Successfully connected to 192.168.1.85 port 8554
[rtsp @ 0x55c15e3e8300] SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=Stream
c=IN IP4 0.0.0.0
t=0 0
m=video 0 RTP/AVP 96
a=control:rtsp://192.168.1.85:8554/camera/trackID=0
a=rtpmap:96 MP4V-ES/90000
a=fmtp:96 config=000001B001000001B58913000001000000012000C48D88002D3C04871443000001B24C61766335392E33372E313030; profile-level-id=1

[rtsp @ 0x55c15e3e8300] video codec set to: mpeg4
[rtp @ 0x55c15e3ef600] No default whitelist set
[udp @ 0x55c15e3f0200] No default whitelist set
[udp @ 0x55c15e3f0200] end receive buffer size reported is 425984
[udp @ 0x55c15e3eff40] No default whitelist set
[udp @ 0x55c15e3eff40] end receive buffer size reported is 425984
[rtsp @ 0x55c15e3e8300] setting jitter buffer size to 500
[rtsp @ 0x55c15e3e8300] hello state=0
[rtsp @ 0x55c15e3e8300] Could not find codec parameters for stream 0 (Video: mpeg4, 1 reference frame, none(left), 1920x1080 [SAR 1:1 DAR 16:9], 1/5): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, rtsp, from 'rtsp://192.168.1.85:8554/camera':
  Metadata:
    title           : Stream
  Duration: N/A, bitrate: N/A
  Stream #0:0, 0, 1/90000: Video: mpeg4, 1 reference frame, none(left), 1920x1080 [SAR 1:1 DAR 16:9], 0/1, 5 tbr, 90k tbn
Successfully opened the file.
Parsing a group of options: output url output/out%03d.mp4.
Applying option f (force format) with argument v4l2.
Applying option c (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0.
Applying option f (force format) with argument segment.
Successfully parsed a group of options.
Opening an output file: output/out%03d.mp4.
Successfully opened the file.
[segment @ 0x55c15e415a80] Selected stream id:0 type:video
[segment @ 0x55c15e415a80] Opening 'output/out000.mp4' for writing
[file @ 0x55c15e42d840] Setting default whitelist 'file,crypto,data'
Output #0, segment, to 'output/out%03d.mp4':
  Metadata:
    title           : Stream
    encoder         : Lavf59.27.100
  Stream #0:0, 0, 1/10240: Video: mpeg4, 1 reference frame, none(left), 1920x1080 (0x0) [SAR 1:1 DAR 16:9], 0/1, q=2-31, 5 tbr, 10240 tbn
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
No more output streams to write to, finishing.:00.00 bitrate=N/A speed=   0x
[segment @ 0x55c15e415a80] segment:'output/out000.mp4' count:0 ended
[AVIOContext @ 0x55c15e42d8c0] Statistics: 292 bytes written, 2 seeks, 3 writeouts
frame=    0 fps=0.0 q=-1.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (rtsp://192.168.1.85:8554/camera):
  Input stream #0:0 (video): 0 packets read (0 bytes);
  Total: 0 packets (0 bytes) demuxed
Output file #0 (output/out%03d.mp4):
  Output stream #0:0 (video): 0 packets muxed (0 bytes);
  Total: 0 packets (0 bytes) muxed
0 frames successfully decoded, 0 decoding errors


    


    Additional info :

    


      

    • The stream is up and running. ffplay rtsp://192.168.1.85:8554/camera opens normally
    • 


    • The exact command (from ENTRYPOINT) on the host, works perfectly fine (it generates files for every 30 seconds).
    • 


    • From inside the container, I can ping 192.168.1.85 (it is actually localhost)
    • 


    • Setting -analyzeduration 1000 does not fix the issue
    • 


    


    Why is the container stopping for no reason ?

    


  • save a serial of images(cv::Mat) to a mp4 file in Variable Frame Rate mode by using ffmpeg library, how to set the pts ?

    2 mai 2023, par ollydbg23

    In C++ code, I can correctly save a serial of images(opencv's cv::Mat) to a mp4 file by using ffmpeg library, see the question and answer here : avformat_write_header() function call crashed when I try to save several RGB data to a output.mp4 file

    


    Now here comes another question :

    


    Rotem' answer in that question can have the output.mp4 saved correctly. When play the mp4 file, I see the frames(OpenCV's cv::Mat image) shows in a const rate.

    


    What I can do if I have got the frames not in a const frequency, for example, the I got the first frame at the 0ms, and the second frame at the 50ms the third frame at 75ms, so that the each frame as associated time stamp, for example, those time stamp array are something like below :

    


    int timestamp[100] = {0, 50, 75, ...};


    


    What is the method to modify the Rotem's answer to reflect this ? It looks like I have to change the pts field of each frame. Because I just test the code, if I change this :

    


    yuvFrame->pts = av_rescale_q(frame_count*frame_count, outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp

// note I change from frame_count to frame_count*frame_count


    


    Then the output.mp4 plays slower and slower, because the later frame has large pts values.

    


    Thanks.

    


    EDIT

    


    This is the code I'm currently used :

    


    #include <iostream>&#xA;#include <vector>&#xA;#include <cstring>&#xA;#include <fstream>&#xA;#include <sstream>&#xA;#include <stdexcept>&#xA;#include <opencv2></opencv2>opencv.hpp>&#xA;extern "C" {&#xA;#include <libavutil></libavutil>imgutils.h>&#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;#include <libavformat></libavformat>avformat.h>&#xA;#include <libavutil></libavutil>opt.h>&#xA;}&#xA;&#xA;#include<cstdlib> // to generate time stamps&#xA;&#xA;using namespace std;&#xA;using namespace cv;&#xA;&#xA;int main()&#xA;{&#xA;    // Set up input frames as BGR byte arrays&#xA;    vector<mat> frames;&#xA;&#xA;    int width = 640;&#xA;    int height = 480;&#xA;    int num_frames = 100;&#xA;    Scalar black(0, 0, 0);&#xA;    Scalar white(255, 255, 255);&#xA;    int font = FONT_HERSHEY_SIMPLEX;&#xA;    double font_scale = 1.0;&#xA;    int thickness = 2;&#xA;&#xA;    for (int i = 0; i &lt; num_frames; i&#x2B;&#x2B;) {&#xA;        Mat frame = Mat::zeros(height, width, CV_8UC3);&#xA;        putText(frame, std::to_string(i), Point(width / 2 - 50, height / 2), font, font_scale, white, thickness);&#xA;        frames.push_back(frame);&#xA;    }&#xA;&#xA;    // generate a serial of time stamps which is used to set the PTS value&#xA;    // suppose they are in ms unit, the time interval is between 30ms to 59ms&#xA;    vector<int> timestamps;&#xA;&#xA;    for (int i = 0; i &lt; num_frames; i&#x2B;&#x2B;) {&#xA;        int timestamp;&#xA;        if (i == 0)&#xA;            timestamp = 0;&#xA;        else&#xA;        {&#xA;            int random = 30 &#x2B; (rand() % 30);&#xA;            timestamp = timestamps[i-0] &#x2B; random;&#xA;        }&#xA;&#xA;        timestamps.push_back(timestamp);&#xA;    }&#xA;&#xA;    // Populate frames with BGR byte arrays&#xA;&#xA;    // Initialize FFmpeg&#xA;    //av_register_all();&#xA;&#xA;    // Set up output file&#xA;    AVFormatContext* outFormatCtx = nullptr;&#xA;    //AVCodec* outCodec = nullptr;&#xA;    AVCodecContext* outCodecCtx = nullptr;&#xA;    //AVStream* outStream = nullptr;&#xA;    //AVPacket outPacket;&#xA;&#xA;    const char* outFile = "output.mp4";&#xA;    int outWidth = frames[0].cols;&#xA;    int outHeight = frames[0].rows;&#xA;    int fps = 25;&#xA;&#xA;    // Open the output file context&#xA;    avformat_alloc_output_context2(&amp;outFormatCtx, nullptr, nullptr, outFile);&#xA;    if (!outFormatCtx) {&#xA;        cerr &lt;&lt; "Error: Could not allocate output format context" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    // Open the output file&#xA;    if (avio_open(&amp;outFormatCtx->pb, outFile, AVIO_FLAG_WRITE) &lt; 0) {&#xA;        cerr &lt;&lt; "Error opening output file" &lt;&lt; std::endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    // Set up output codec&#xA;    const AVCodec* outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);&#xA;    if (!outCodec) {&#xA;        cerr &lt;&lt; "Error: Could not find H.264 codec" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    outCodecCtx = avcodec_alloc_context3(outCodec);&#xA;    if (!outCodecCtx) {&#xA;        cerr &lt;&lt; "Error: Could not allocate output codec context" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;    outCodecCtx->codec_id = AV_CODEC_ID_H264;&#xA;    outCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;&#xA;    outCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;&#xA;    outCodecCtx->width = outWidth;&#xA;    outCodecCtx->height = outHeight;&#xA;    outCodecCtx->time_base = { 1, fps*1000 };   // 25000&#xA;    outCodecCtx->framerate = {fps, 1};          // 25&#xA;    outCodecCtx->bit_rate = 4000000;&#xA;&#xA;    //https://github.com/leandromoreira/ffmpeg-libav-tutorial&#xA;    //We set the flag AV_CODEC_FLAG_GLOBAL_HEADER which tells the encoder that it can use the global headers.&#xA;    if (outFormatCtx->oformat->flags &amp; AVFMT_GLOBALHEADER)&#xA;    {&#xA;        outCodecCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; //&#xA;    }&#xA;&#xA;    // Open output codec&#xA;    if (avcodec_open2(outCodecCtx, outCodec, nullptr) &lt; 0) {&#xA;        cerr &lt;&lt; "Error: Could not open output codec" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    // Create output stream&#xA;    AVStream* outStream = avformat_new_stream(outFormatCtx, outCodec);&#xA;    if (!outStream) {&#xA;        cerr &lt;&lt; "Error: Could not allocate output stream" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    // Configure output stream parameters (e.g., time base, codec parameters, etc.)&#xA;    // ...&#xA;&#xA;    // Connect output stream to format context&#xA;    outStream->codecpar->codec_id = outCodecCtx->codec_id;&#xA;    outStream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;&#xA;    outStream->codecpar->width = outCodecCtx->width;&#xA;    outStream->codecpar->height = outCodecCtx->height;&#xA;    outStream->codecpar->format = outCodecCtx->pix_fmt;&#xA;    outStream->time_base = outCodecCtx->time_base;&#xA;&#xA;    int ret = avcodec_parameters_from_context(outStream->codecpar, outCodecCtx);&#xA;    if (ret &lt; 0) {&#xA;        cerr &lt;&lt; "Error: Could not copy codec parameters to output stream" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    outStream->avg_frame_rate = outCodecCtx->framerate;&#xA;    //outStream->id = outFormatCtx->nb_streams&#x2B;&#x2B;;  &lt;--- We shouldn&#x27;t modify outStream->id&#xA;&#xA;    ret = avformat_write_header(outFormatCtx, nullptr);&#xA;    if (ret &lt; 0) {&#xA;        cerr &lt;&lt; "Error: Could not write output header" &lt;&lt; endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    // Convert frames to YUV format and write to output file&#xA;    int frame_count = -1;&#xA;    for (const auto&amp; frame : frames) {&#xA;        frame_count&#x2B;&#x2B;;&#xA;        AVFrame* yuvFrame = av_frame_alloc();&#xA;        if (!yuvFrame) {&#xA;            cerr &lt;&lt; "Error: Could not allocate YUV frame" &lt;&lt; endl;&#xA;            return -1;&#xA;        }&#xA;        av_image_alloc(yuvFrame->data, yuvFrame->linesize, outWidth, outHeight, AV_PIX_FMT_YUV420P, 32);&#xA;&#xA;        yuvFrame->width = outWidth;&#xA;        yuvFrame->height = outHeight;&#xA;        yuvFrame->format = AV_PIX_FMT_YUV420P;&#xA;&#xA;        // Convert BGR frame to YUV format&#xA;        Mat yuvMat;&#xA;        cvtColor(frame, yuvMat, COLOR_BGR2YUV_I420);&#xA;        memcpy(yuvFrame->data[0], yuvMat.data, outWidth * outHeight);&#xA;        memcpy(yuvFrame->data[1], yuvMat.data &#x2B; outWidth * outHeight, outWidth * outHeight / 4);&#xA;        memcpy(yuvFrame->data[2], yuvMat.data &#x2B; outWidth * outHeight * 5 / 4, outWidth * outHeight / 4);&#xA;&#xA;        // Set up output packet&#xA;        //av_init_packet(&amp;outPacket); //error C4996: &#x27;av_init_packet&#x27;: was declared deprecated&#xA;        AVPacket* outPacket = av_packet_alloc();&#xA;        memset(outPacket, 0, sizeof(outPacket)); //Use memset instead of av_init_packet (probably unnecessary).&#xA;        //outPacket->data = nullptr;&#xA;        //outPacket->size = 0;&#xA;&#xA;        yuvFrame->pts = av_rescale_q(timestamps[frame_count], outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp&#xA;&#xA;        // Encode frame and write to output file&#xA;        int ret = avcodec_send_frame(outCodecCtx, yuvFrame);&#xA;        if (ret &lt; 0) {&#xA;            cerr &lt;&lt; "Error: Could not send frame to output codec" &lt;&lt; endl;&#xA;            return -1;&#xA;        }&#xA;        while (ret >= 0) {&#xA;            ret = avcodec_receive_packet(outCodecCtx, outPacket);&#xA;            if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {&#xA;                break;&#xA;            } else if (ret &lt; 0) {&#xA;                cerr &lt;&lt; "Error: Could not receive packet from output codec" &lt;&lt; endl;&#xA;                return -1;&#xA;            }&#xA;&#xA;            //av_packet_rescale_ts(&amp;outPacket, outCodecCtx->time_base, outStream->time_base);&#xA;&#xA;            outPacket->stream_index = outStream->index;&#xA;&#xA;            outPacket->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base);   // Set packet duration&#xA;&#xA;            ret = av_interleaved_write_frame(outFormatCtx, outPacket);&#xA;            av_packet_unref(outPacket);&#xA;            if (ret &lt; 0) {&#xA;                cerr &lt;&lt; "Error: Could not write packet to output file" &lt;&lt; endl;&#xA;                return -1;&#xA;            }&#xA;        }&#xA;&#xA;        av_frame_free(&amp;yuvFrame);&#xA;    }&#xA;&#xA;    // Flush the encoder&#xA;    ret = avcodec_send_frame(outCodecCtx, nullptr);&#xA;    if (ret &lt; 0) {&#xA;        std::cerr &lt;&lt; "Error flushing encoder: " &lt;&lt; std::endl;&#xA;        return -1;&#xA;    }&#xA;&#xA;    while (ret >= 0) {&#xA;        AVPacket* pkt = av_packet_alloc();&#xA;        if (!pkt) {&#xA;            std::cerr &lt;&lt; "Error allocating packet" &lt;&lt; std::endl;&#xA;            return -1;&#xA;        }&#xA;        ret = avcodec_receive_packet(outCodecCtx, pkt);&#xA;&#xA;        // Write the packet to the output file&#xA;        if (ret == 0)&#xA;        {&#xA;            pkt->stream_index = outStream->index;&#xA;            pkt->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base);   // &lt;---- Set packet duration&#xA;            ret = av_interleaved_write_frame(outFormatCtx, pkt);&#xA;            av_packet_unref(pkt);&#xA;            if (ret &lt; 0) {&#xA;                std::cerr &lt;&lt; "Error writing packet to output file: " &lt;&lt; std::endl;&#xA;                return -1;&#xA;            }&#xA;        }&#xA;    }&#xA;&#xA;&#xA;    // Write output trailer&#xA;    av_write_trailer(outFormatCtx);&#xA;&#xA;    // Clean up&#xA;    avcodec_close(outCodecCtx);&#xA;    avcodec_free_context(&amp;outCodecCtx);&#xA;    avformat_free_context(outFormatCtx);&#xA;&#xA;    return 0;&#xA;}&#xA;</int></mat></cstdlib></stdexcept></sstream></fstream></cstring></vector></iostream>

    &#xA;

    Especially, I have those changes to the original Rotem's answer :

    &#xA;

    Fist, I have some code to generate a time stamp array :

    &#xA;

        // generate a serial of time stamps which is used to set the PTS value&#xA;    // suppose they are in ms unit, the time interval is between 30ms to 59ms&#xA;    vector<int> timestamps;&#xA;&#xA;    for (int i = 0; i &lt; num_frames; i&#x2B;&#x2B;) {&#xA;        int timestamp;&#xA;        if (i == 0)&#xA;            timestamp = 0;&#xA;        else&#xA;        {&#xA;            int random = 30 &#x2B; (rand() % 30);&#xA;            timestamp = timestamps[i-0] &#x2B; random;&#xA;        }&#xA;&#xA;        timestamps.push_back(timestamp);&#xA;    }&#xA;</int>

    &#xA;

    Second, I just set the PTS by those values :

    &#xA;

            yuvFrame->pts = av_rescale_q(timestamps[frame_count], outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp&#xA;

    &#xA;

    Note that I have set the fps like below :

    &#xA;

        outCodecCtx->time_base = { 1, fps*1000 };   // 25000&#xA;    outCodecCtx->framerate = {fps, 1};          // 25&#xA;

    &#xA;

    Now, when I run the program, I got a lot of warnings in the console :

    &#xA;

    [libx264 @ 0000022e7fa621c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 0000022e7fa621c0] profile High, level 3.0, 4:2:0, 8-bit&#xA;[libx264 @ 0000022e7fa621c0] 264 - core 164 r3094M bfc87b7 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=4000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS&#xA;[libx264 @ 0000022e7fa621c0] invalid DTS: PTS is less than DTS&#xA;[mp4 @ 0000022e090b2300] pts (592) &lt; dts (1129348497) in stream 0&#xA;Error: Could not write packet to output file&#xA;

    &#xA;

    Any ideas ?&#xA;Thanks.

    &#xA;