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Other interesting software

13 avril 2011, par kent1

We 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 : (...)
Le plugin : Podcasts.

14 juillet 2010, par kent1

Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
Types de fichiers supportés dans les flux
Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)
Qualité du média après traitement

21 juin 2013, par etalarma

Le bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)

1 | 2 | 3

Sur d’autres sites (3997)

Improve ffmpeg x11grab screen capture performance

10 janvier 2020, par Toby Eggitt

I have been doing screen-only (no sound) capture using ffmpeg with libx264 for the encoding quite successfully on an old machine built around a Core2 Quad Q6600 processor. I now need to include audio in this, but the fans on this ancient machine are too loud. So, I found a fanless motherboard (https://www.asrock.com/mb/Intel/J5005-ITX/index.asp) that has an Intel Pentium Silver J5005 processor and decided to use this instead. The CPU’s benchmarks put it in a similar bracket to the Q6600, and the general performance seems to be significantly better, presumably at least in part because it’s now using DDR4 memory that’s faster access.

However, the machine fails horribly at the screen capture. It’s missing frames all over the place ; I actually end up with video that’s missing almost half the frames, and plays back at about double speed. Also, any audio is just messed up so badly I can hardly think how to describe it, best I can come up with is that I get perhaps a quarter second of sound then a few seconds pause (the video meanwhile is actually still playing back, albeit with no sense of time).

Some things occur to me that might be the cause, or cure, of my troubles, some of which I might be able to fix, others not so much. What other things should I try ? (I’d prefer to avoid simply throwing money at the issue with random ideas that are baseless !)

1) perhaps the CPU lacks some "extensions" to the instruction set (I recall years ago some CPUs gaining MMX extensions") so that the CPU is fast at mundane computing but sucks at video encoding.

2) perhaps the fact that the old machine had a dedicated graphics card, while this new one is sharing main memory with the graphics system means that reading the screen pixels is much slower.

3) perhaps the fact that this new machine has a single DDR4 memory stick in it means that I’m forcing all the memory reads and writes for the computations through the same memory as is holding the screen, and that’s too much (implying that adding an additional memory stick might jus possibly help ?)

4) perhaps there’s some bios setting that would allow more efficient sharing of video memory ?

5) my favorite, perhaps there’s a better compression library that I could use to get decent quality screen capture with much less CPU usage.

I should also note that I have tried this with -threads 0, and the CPU usage hovers between 100% and 200% ; around 100% when the screen is static, and rising as I move windows around and otherwise create more output.

6) the motherboard claims to have some kind of hardware video encoder built into it. I haven’t paid this any attention to this point, as I assumed it was for the purpose of taking HDMI input and encoding it, but maybe there’s a way to use this, if so, what libraries might I need to get ffmpeg to do this.

Edits :

This is an off the shelf ffmpeg. I’m certainly willing to try building it myself if I have some idea what I should do different.
The motherboard claims to have hardware encoders, but I’m struggling to find out what they are (seems like it’s an Intel chip called "UHD Graphics 605" but nothing I can find suggests ffmpeg can work with that)

command line right now has been (without audio) :

ffmpeg  -video_size 1280x720   -f x11grab  -i ${DISPLAY}+100,100  -vcodec libx264  -f alsa -i pulse -acodec ac3 -threads 0  ./video$(date +%F-%H-%M-%S).mp4

Log from a short recording session is :

ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers

  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)

  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared

  libavutil      55. 78.100 / 55. 78.100

  libavcodec     57.107.100 / 57.107.100

  libavformat    57. 83.100 / 57. 83.100

  libavdevice    57. 10.100 / 57. 10.100

  libavfilter     6.107.100 /  6.107.100

  libavresample   3.  7.  0 /  3.  7.  0

  libswscale      4.  8.100 /  4.  8.100

  libswresample   2.  9.100 /  2.  9.100

  libpostproc    54.  7.100 / 54.  7.100

[x11grab @ 0x561a723e5ac0] Stream #0: not enough frames to estimate rate; consider increasing probesize

Input #0, x11grab, from ':0+100,100':

  Duration: N/A, start: 1578693116.465807, bitrate: N/A

    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1280x720, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc

Unknown decoder 'libx264'

simon@studio:~$ ffmpeg  -video_size 1280x720   -f x11grab  -i ${DISPLAY}+100,100  -vcodec libx264 -threads 0  ./video$(date +%F-%H-%M-%S).mp4

ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers

  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)

  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared

  libavutil      55. 78.100 / 55. 78.100

  libavcodec     57.107.100 / 57.107.100

  libavformat    57. 83.100 / 57. 83.100

  libavdevice    57. 10.100 / 57. 10.100

  libavfilter     6.107.100 /  6.107.100

  libavresample   3.  7.  0 /  3.  7.  0

  libswscale      4.  8.100 /  4.  8.100

  libswresample   2.  9.100 /  2.  9.100

  libpostproc    54.  7.100 / 54.  7.100

[x11grab @ 0x558225bc29a0] Stream #0: not enough frames to estimate rate; consider increasing probesize

Input #0, x11grab, from ':0+100,100':

  Duration: N/A, start: 1578693132.513351, bitrate: N/A

    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1280x720, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc

Stream mapping:

  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))

Press [q] to stop, [?] for help

[libx264 @ 0x558225bcd360] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2

[libx264 @ 0x558225bcd360] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit

[libx264 @ 0x558225bcd360] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 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=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00

Output #0, mp4, to './video2020-01-10-14-52-12.mp4':

  Metadata:

    encoder         : Lavf57.83.100

    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1280x720, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc

    Metadata:

      encoder         : Lavc57.107.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

Past duration 0.806847 too large     256kB time=00:00:00.43 bitrate=4835.3kbits/s dup=16 drop=0 speed=0.207x    

frame=  371 fps= 29 q=-1.0 Lsize=     639kB time=00:00:12.27 bitrate= 426.6kbits/s dup=16 drop=14 speed=0.971x    

video:634kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.813096%

[libx264 @ 0x558225bcd360] frame I:2     Avg QP:18.16  size:221502

[libx264 @ 0x558225bcd360] frame P:93    Avg QP:14.97  size:  2007

[libx264 @ 0x558225bcd360] frame B:276   Avg QP:20.13  size:    69

[libx264 @ 0x558225bcd360] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%

[libx264 @ 0x558225bcd360] mb I  I16..4: 44.6%  0.0% 55.4%

[libx264 @ 0x558225bcd360] mb P  I16..4:  0.2%  0.0%  0.3%  P16..4:  0.7%  0.1%  0.1%  0.0%  0.0%    skip:98.5%

[libx264 @ 0x558225bcd360] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.0%  0.0%  0.0%  direct: 0.0%  skip:99.0%  L0:50.9% L1:49.0% BI: 0.1%

[libx264 @ 0x558225bcd360] coded y,u,v intra: 41.3% 37.5% 37.4% inter: 0.1% 0.0% 0.0%

[libx264 @ 0x558225bcd360] i16 v,h,dc,p: 58% 41%  1%  0%

[libx264 @ 0x558225bcd360] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 30% 14%  2%  4%  4%  5%  3%  5%

[libx264 @ 0x558225bcd360] Weighted P-Frames: Y:0.0% UV:0.0%

[libx264 @ 0x558225bcd360] ref P L0: 59.2%  8.8% 25.5%  6.5%

[libx264 @ 0x558225bcd360] ref B L0: 59.4% 39.0%  1.6%

[libx264 @ 0x558225bcd360] ref B L1: 96.5%  3.5%

[libx264 @ 0x558225bcd360] kb/s:419.29

Exiting normally, received signal 2.

Matomo analytics for wordpress

15 octobre 2019, par Matomo Core Team — Community
Self-hosting web analytics got a whole lot easier ! Introducing Matomo for WordPress

Be the first to try it out ! Your feedback is much needed and appreciated

Get a fully functioning Matomo (which is comparable to Google Analytics) in seconds ! How ? With the new Matomo Analytics for WordPress plugin.

Web analytics in WordPress has never been easier to get, or more powerful. Matomo Analytics for WordPress is the one-stop problem solver. It’ll save you time, money and give you the insights to help your website or business succeed.

Best of all, we get to further the goal of decentralising the internet. Our hope is for Matomo Analytics for WordPress to spread far and wide. We’re so excited that more and more people can now get their hands on this powerful, free, open-source analytics platform, in a few clicks !

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Full data ownership – all data is stored on your servers and no one else can see your data
Privacy protection / GDPR compliance
Ecommerce tracking out-of-the-box (Woocommerce, Easy Digital Downloads, and MemberPress) and we’re keen to add many more over time
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FAQs

Isn’t there already a WP-Matomo plugin for WordPress available ?

Yes, the existing WP-Matomo (WP-Piwik) plugin is an awesome plugin to connect your existing Matomo On-Premise or Matomo Cloud account with WordPress. The difference is that this new plugin installs Matomo Analytics fully in your WordPress. So you get the convenience of having a powerful analytics platform within your WordPress.

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If you have a lot of traffic, we’d advise you to install Matomo On-Premise separately. There’s no specific traffic threshold we can give you on when it’s better to use Matomo On-Premise. It really depends on your server.

We reckon if you have more than 500,000 page views a month, you may want to think about using Matomo On-Premise with WP-Matomo instead, but this is just an estimate. In general, if the load on your server is already quite high, then it might be better to install Matomo on a separate server. See also recommended server sizing for running Matomo.

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Please create an issue, on our repository whenever you find a bug or if you have any suggestion or ideas of improvement. We want to build an outstanding analytics experience for WordPress !

Have another question you’re dying to ask ? The Matomo for WordPress FAQ page might have the answer you need.

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Get ahead of the crowd – signup to our exclusive Matomo for WordPress newsletter to get the latest updates on this exciting new project.

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} else { if (field.className.indexOf('invalid') === -1) field.className += ' invalid'; this.onSelectCallback(input); this.isValid = false; } }, htmlEmbedDropdownValidation: function(field) { var dropdowns = field.querySelectorAll('.mimi_html_dropdown'); var _this = this; for (var i = 0; i < dropdowns.length; ++i) { var dropdown = dropdowns[i]; if (dropdown.value) { field.className = field.className.replace(/ invalid/g, ''); } else { if (field.className.indexOf('invalid') === -1) field.className += ' invalid'; this.isValid = false; dropdown.onchange = (function(){ _this.validate(); }); } } }, textFieldError: function(input) { input.className = 'required invalid'; input.placeholder = input.getAttribute('data-required-field'); }, removeTextFieldError: function(input) { input.className = 'required'; input.placeholder = ''; }, onSelectCallback: function(input) { if (typeof Widget === 'undefined' || !Widget.BasicDropdown) return; var dropdownEl = input.parentNode, instances = Widget.BasicDropdown.instances, _this = this; for (var i = 0; i < instances.length; ++i) { var instance = instances[i]; if (instance.wrapperEl === dropdownEl) { instance.onSelect = function(){ _this.validate() }; } } }, updateFormAfterValidation: function() { this.form.className = this.setFormClassName(); this.submit.value = this.submitButtonText(); this.submit.disabled = !this.isValid; this.submit.className = this.isValid ? 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Libav/ffmpeg api duplicates first frame of mp4 video and makes it second frame

22 janvier 2020, par Optic_Ray

I am making video mp4 file from couple of jpg image files with different sizes present as sample< number >.jpg (sample1.jpg, sample2.jpg, etc) in a folder. I modified ffmpeg muxing.c example to make it create mp4 file from these set of jpg images(for frames) and also modified it to create only video stream(no audio stream). It is able to create mp4 file with n video frames from n different jpg image files, but mp4 file it outputs when n=2 isn’t as expected. I have tried from n=1 to n=7 so far. When n=2 mp4 file is created but I could see only first jpg image as frame in the entire video. It appears as if first frame(first jpg image) is duplicated and used as second frame too, as I just can’t find image of second jpg image file when I play the video. When I make video with 2 frames from 2 different jpg files, I want first frame to be first jpg image and second frame to be second jpg image. How do I achieve that ?

ffmpeg configuration :

ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers

  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)

  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared

  libavutil      55. 78.100 / 55. 78.100

  libavcodec     57.107.100 / 57.107.100

  libavformat    57. 83.100 / 57. 83.100

  libavdevice    57. 10.100 / 57. 10.100

  libavfilter     6.107.100 /  6.107.100

  libavresample   3.  7.  0 /  3.  7.  0

  libswscale      4.  8.100 /  4.  8.100

  libswresample   2.  9.100 /  2.  9.100

  libpostproc    54.  7.100 / 54.  7.100

Hyper fast Audio and Video encoder

Number of frames in video can be set in #define STREAM_FRAME_RATE n//n=number of frames. Following is the entire code :

#include 

#include <libavutil></libavutil>avassert.h>

#include <libavutil></libavutil>channel_layout.h>

#include <libavutil></libavutil>opt.h>

#include <libavutil></libavutil>mathematics.h>

#include <libavutil></libavutil>imgutils.h>

#include <libavutil></libavutil>timestamp.h>

#include <libavformat></libavformat>avformat.h>

#include <libswscale></libswscale>swscale.h>

#include <libswresample></libswresample>swresample.h>



#define STREAM_DURATION   1

#define STREAM_FRAME_RATE 2 /* 2 image/s */

#define STREAM_PIX_FMT    AV_PIX_FMT_YUV420P /* default pix_fmt */



#define SCALE_FLAGS SWS_BICUBIC



// a wrapper around a single output AVStream

typedef struct OutputStream {

    AVStream *st;

    AVCodecContext *enc;



    /* pts of the next frame that will be generated */

    int64_t next_pts;

    int samples_count;



    AVFrame *frame;

    AVFrame *tmp_frame;



    float t, tincr, tincr2;



    struct SwsContext *sws_ctx;

    struct SwrContext *swr_ctx;

} OutputStream;



static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt)

{

    AVRational *time_base = &amp;fmt_ctx->streams[pkt->stream_index]->time_base;



    printf("pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n",

           av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base),

           av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base),

           av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base),

           pkt->stream_index);

}



static int write_frame(AVFormatContext *fmt_ctx, const AVRational *time_base, AVStream *st, AVPacket *pkt)

{

    /* rescale output packet timestamp values from codec to stream timebase */

    av_packet_rescale_ts(pkt, *time_base, st->time_base);

    pkt->stream_index = st->index;

    /* Write the compressed frame to the media file. */

    log_packet(fmt_ctx, pkt);

    return av_interleaved_write_frame(fmt_ctx, pkt);

}



/* Add an output stream. */

static void add_stream(OutputStream *ost, AVFormatContext *oc,

                       AVCodec **codec,

                       enum AVCodecID codec_id)

{

    AVCodecContext *c;

    int i;

    /* find the encoder */

    *codec = avcodec_find_encoder(codec_id);

    if (!(*codec)) {

        fprintf(stderr, "Could not find encoder for '%s'\n",

                avcodec_get_name(codec_id));

        exit(1);

    }



    ost->st = avformat_new_stream(oc, NULL);

    if (!ost->st) {

        fprintf(stderr, "Could not allocate stream\n");

        exit(1);

    }

    ost->st->id = oc->nb_streams-1;

    c = avcodec_alloc_context3(*codec);

    if (!c) {

        fprintf(stderr, "Could not alloc an encoding context\n");

        exit(1);

    }

    ost->enc = c;



    switch ((*codec)->type) {

    case AVMEDIA_TYPE_AUDIO:

    printf("######################2 audio add stream\n");

        c->sample_fmt  = (*codec)->sample_fmts ?

            (*codec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP;

        c->bit_rate    = 64000;

        c->sample_rate = 44100;

        if ((*codec)->supported_samplerates) {

            c->sample_rate = (*codec)->supported_samplerates[0];

            for (i = 0; (*codec)->supported_samplerates[i]; i++) {

                if ((*codec)->supported_samplerates[i] == 44100)

                    c->sample_rate = 44100;

            }

        }

        c->channels        = av_get_channel_layout_nb_channels(c->channel_layout);

        c->channel_layout = AV_CH_LAYOUT_STEREO;

        if ((*codec)->channel_layouts) {

            c->channel_layout = (*codec)->channel_layouts[0];

            for (i = 0; (*codec)->channel_layouts[i]; i++) {

                if ((*codec)->channel_layouts[i] == AV_CH_LAYOUT_STEREO)

                    c->channel_layout = AV_CH_LAYOUT_STEREO;

            }

        }

        c->channels        = av_get_channel_layout_nb_channels(c->channel_layout);

        ost->st->time_base = (AVRational){ 1, c->sample_rate };

        break;



    case AVMEDIA_TYPE_VIDEO:

    printf("###################### video add stream\n");

        c->codec_id = codec_id;



        c->bit_rate = 400000;

        /* Resolution must be a multiple of two. */

        c->width    = 352;

        c->height   = 288;

        /* timebase: This is the fundamental unit of time (in seconds) in terms

         * of which frame timestamps are represented. For fixed-fps content,

         * timebase should be 1/framerate and timestamp increments should be

         * identical to 1. */

        ost->st->time_base = (AVRational){ 1, STREAM_FRAME_RATE };

        c->time_base       = ost->st->time_base;



        c->gop_size      = 12; /* emit one intra frame every twelve frames at most */

        c->pix_fmt       = STREAM_PIX_FMT;

        if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {

            /* just for testing, we also add B-frames */

            c->max_b_frames = 2;//2

        }

        if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

            /* Needed to avoid using macroblocks in which some coeffs overflow.

             * This does not happen with normal video, it just happens here as

             * the motion of the chroma plane does not match the luma plane. */

            c->mb_decision = 2;//2

        }

    break;



    default:

        break;

    }



    /* Some formats want stream headers to be separate. */

    if (oc->oformat->flags &amp; AVFMT_GLOBALHEADER)

        c->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;

}





/**************************************************************/

/* video output */



static AVFrame *alloc_picture(enum AVPixelFormat pix_fmt, int width, int height)

{

    AVFrame *picture;

    int ret;



    picture = av_frame_alloc();

    if (!picture)

        return NULL;



    picture->format = pix_fmt;

    picture->width  = width;

    picture->height = height;



    /* allocate the buffers for the frame data */

    ret = av_frame_get_buffer(picture, 32);

    if (ret &lt; 0) {

        fprintf(stderr, "Could not allocate frame data.\n");

        exit(1);

    }



    return picture;

}



static void open_video(AVFormatContext *oc, AVCodec *codec, OutputStream *ost, AVDictionary *opt_arg)

{

    int ret;

    AVCodecContext *c = ost->enc;

    AVDictionary *opt = NULL;



    av_dict_copy(&amp;opt, opt_arg, 0);

    printf("In open video\n");

    /* open the codec */

    ret = avcodec_open2(c, codec, &amp;opt);

    av_dict_free(&amp;opt);

    if (ret &lt; 0) {

        fprintf(stderr, "Could not open video codec: %s\n", av_err2str(ret));

        exit(1);

    }



    /* allocate and init a re-usable frame */

    ost->frame = alloc_picture(c->pix_fmt, c->width, c->height);

    if (!ost->frame) {

        fprintf(stderr, "Could not allocate video frame\n");

        exit(1);

    }



    /* If the output format is not YUV420P, then a temporary YUV420P

     * picture is needed too. It is then converted to the required

     * output format. */

    ost->tmp_frame = NULL;

    if (c->pix_fmt != AV_PIX_FMT_YUV420P) {

        ost->tmp_frame = alloc_picture(AV_PIX_FMT_YUV420P, c->width, c->height);

        if (!ost->tmp_frame) {

            fprintf(stderr, "Could not allocate temporary picture\n");

            exit(1);

        }

    }



    /* copy the stream parameters to the muxer */

    ret = avcodec_parameters_from_context(ost->st->codecpar, c);

    if (ret &lt; 0) {

        fprintf(stderr, "Could not copy the stream parameters\n");

        exit(1);

    }

}



int open_image(const char* imageFileName,int width,int height,AVFrame *pict)

{

    AVFormatContext *pFormatContext = avformat_alloc_context();

        if (!pFormatContext)

        {

            printf("ERROR could not allocate memory for Format Context");

            return 0;

        }

    //av_register_all();

    if (avformat_open_input(&amp;pFormatContext, imageFileName, NULL, NULL) != 0) 

        {

        printf("ERROR could not open the file");

        return 0;

        }

    printf("format %s, duration %ld us, bit_rate %ld", pFormatContext->iformat->name, pFormatContext->duration, pFormatContext->bit_rate);

    if (avformat_find_stream_info(pFormatContext,  NULL) &lt; 0) 

        {

        printf("ERROR could not get the stream info");

        return 0;

        }

    AVCodecParameters *pCodecParameters = pFormatContext->streams[0]->codecpar;

    printf("%d",pFormatContext->nb_streams);

    AVCodec *pCodec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);

    if (pCodec==NULL) {

        printf("ERROR unsupported codecopenimage!");

        printf("---------------------------------------11");

        return 0;

        }

    AVCodecContext *pCodecCtx =avcodec_alloc_context3(pCodec);

    if (!pCodecCtx)

        {

            printf("failed to allocated memory for AVCodecContext");

            return 0;

        }

        pCodecCtx->width = pCodecParameters->width;

        pCodecCtx->height = pCodecParameters->height;

        pCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;

    if(pCodecCtx->color_range==AVCOL_RANGE_JPEG) printf("\nAVCOL_RANGE_JPEG\n");

    if (avcodec_parameters_to_context(pCodecCtx, pCodecParameters) &lt; 0)

        {

            printf("failed to copy codec params to codec context");

            return 0;

        }

    // Open codec

        if(avcodec_open2(pCodecCtx, pCodec,NULL)&lt;0)

            {

            printf("Could not open codec");

            return 0;

            }



        AVFrame *pFrame = av_frame_alloc();

        if (!pFrame)

            {

            printf("Can't allocate memory for AVFrame\n");

            return 0;

            }



        AVPacket *packet= av_packet_alloc();



        int temp=av_read_frame(pFormatContext, packet);

        while (temp >= 0)

            {

            if(packet->stream_index != 0){

                    continue;}

            int ret = avcodec_send_packet(pCodecCtx,packet);

            if (ret &lt; 0)

                {

            printf("Error while sending a packet to the decoder: %s", av_err2str(ret));

                return 0;

                }

        ret = avcodec_receive_frame(pCodecCtx,pFrame);

            if (ret = 0 || ret != AVERROR(EAGAIN) || ret != AVERROR_EOF)

                {

                    pFrame->quality = 1;

                av_packet_unref(packet);

                struct SwsContext *resize;

                resize = sws_getContext(pCodecParameters->width, pCodecParameters->height,

                                          AV_PIX_FMT_YUVJ420P,

                                          width, height,

                                          AV_PIX_FMT_YUV420P,

                                          SCALE_FLAGS, NULL, NULL, NULL);

                sws_scale(resize,(const uint8_t * const *)pFrame->data, pFrame->linesize,

                  0, pCodecParameters->height, pict->data, pict->linesize);

            av_packet_free(&amp;packet);

            avcodec_free_context(&amp;pCodecCtx);

            avformat_close_input(&amp;pFormatContext);

                    return 1;

                }

            else {

                    printf("Error [%d] while decoding frame: %s\n", ret,

            strerror(AVERROR(ret)));

            return 0;

                }

            }

    avcodec_free_context(&amp;pCodecCtx);

    avformat_close_input(&amp;pFormatContext);

    return 0;

    }



static void fill_yuv_image(AVFrame *pict, int frame_index,

                           int width, int height)

{

    int ret;

    /* when we pass a frame to the encoder, it may keep a reference to it

     * internally;

     * make sure we do not overwrite it here*/



    ret = av_frame_make_writable(pict);

    if (ret &lt; 0)

        exit(1);



    char filename[256];

    sprintf(filename, "sample%d.jpg", frame_index+1);



    if(open_image(filename,width,height,pict)!=1) exit(1);

}



static AVFrame *get_video_frame(OutputStream *ost)

{

    AVCodecContext *c = ost->enc;

    /* check if we want to generate more frames */

    if (av_compare_ts(ost->next_pts, c->time_base,

                      STREAM_DURATION, (AVRational){ 1, 1 }) >= 0)

        return NULL;



    if (c->pix_fmt != AV_PIX_FMT_YUV420P) {

        /* as we only generate a YUV420P picture, we must convert it

         * to the codec pixel format if needed */

        if (!ost->sws_ctx) {

            ost->sws_ctx = sws_getContext(c->width, c->height,

                                          AV_PIX_FMT_YUV420P,

                                          c->width, c->height,

                                          c->pix_fmt,

                                          SCALE_FLAGS, NULL, NULL, NULL);

            if (!ost->sws_ctx) {

                fprintf(stderr,

                        "Could not initialize the conversion context\n");

                exit(1);

            }

        }

        fill_yuv_image(ost->tmp_frame, ost->next_pts, c->width, c->height);

        sws_scale(ost->sws_ctx,

                  (const uint8_t * const *)ost->tmp_frame->data, ost->tmp_frame->linesize,

                  0, c->height, ost->frame->data, ost->frame->linesize);

    } else {

        fill_yuv_image(ost->frame, ost->next_pts, c->width, c->height);

    }



    ost->frame->pts = ost->next_pts++;



    return ost->frame;

}



/*

 * encode one video frame and send it to the muxer

 * return 1 when encoding is finished, 0 otherwise

 */

static int write_video_frame(AVFormatContext *oc, OutputStream *ost)

{

    int ret;

    AVCodecContext *c;

    AVFrame *frame;

    int got_packet = 0;

    AVPacket pkt = { 0 };



    c = ost->enc;

    printf("In write_video_frame\n");

    frame = get_video_frame(ost);



    av_init_packet(&amp;pkt);



    /* encode the image */

    ret = avcodec_encode_video2(c, &amp;pkt, frame, &amp;got_packet);

    if (ret &lt; 0) {

        fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));

        exit(1);

    }

    if (got_packet) {

        ret = write_frame(oc, &amp;c->time_base, ost->st, &amp;pkt);

    } else {

        ret = 0;

    }

    if (ret &lt; 0) {

        fprintf(stderr, "Error while writing video frame: %s\n", av_err2str(ret));

        exit(1);

    }



    return (frame || got_packet) ? 0 : 1;

}



static void close_stream(AVFormatContext *oc, OutputStream *ost)

{

    avcodec_free_context(&amp;ost->enc);

    av_frame_free(&amp;ost->frame);

    av_frame_free(&amp;ost->tmp_frame);

    sws_freeContext(ost->sws_ctx);

    swr_free(&amp;ost->swr_ctx);

}



/**************************************************************/

/* media file output */



int main(int argc, char **argv)

{

    OutputStream video_st = { 0 };

    const char *filename;

    AVOutputFormat *fmt;

    AVFormatContext *oc;

    AVCodec *video_codec;

    int ret;

    int have_video = 0;

    int encode_video = 0;

    AVDictionary *opt = NULL;

    int i;



    /* Initialize libavcodec, and register all codecs and formats. */

    av_register_all();



    if (argc &lt; 2) {

        printf("usage: %s output_file\n"

               "API example program to output a media file with libavformat.\n"

               "This program generates a synthetic audio and video stream, encodes and\n"

               "muxes them into a file named output_file.\n"

               "The output format is automatically guessed according to the file extension.\n"

               "Raw images can also be output by using '%%d' in the filename.\n"

               "\n", argv[0]);

        return 1;

    }



    filename = argv[1];

    for (i = 2; i+1 &lt; argc; i+=2) {

        if (!strcmp(argv[i], "-flags") || !strcmp(argv[i], "-fflags"))

            av_dict_set(&amp;opt, argv[i]+1, argv[i+1], 0);

    }



    /* allocate the output media context */

    avformat_alloc_output_context2(&amp;oc, NULL, NULL, filename);

    if (!oc) {

        printf("Could not deduce output format from file extension: using MPEG.\n");

        avformat_alloc_output_context2(&amp;oc, NULL, "mpeg", filename);

    }

    if (!oc)

        return 1;



    fmt = oc->oformat;



    /* Add the audio and video streams using the default format codecs

     * and initialize the codecs. */

    if (fmt->video_codec != AV_CODEC_ID_NONE) {

        add_stream(&amp;video_st, oc, &amp;video_codec, fmt->video_codec);

        have_video = 1;

        encode_video = 1;

    }



    /* Now that all the parameters are set, we can open the audio and

     * video codecs and allocate the necessary encode buffers. */

    if (have_video)

        open_video(oc, video_codec, &amp;video_st, opt);



    av_dump_format(oc, 0, filename, 1);



    /* open the output file, if needed */

    if (!(fmt->flags &amp; AVFMT_NOFILE)) {

        ret = avio_open(&amp;oc->pb, filename, AVIO_FLAG_WRITE);

        if (ret &lt; 0) {

            fprintf(stderr, "Could not open '%s': %s\n", filename,

                    av_err2str(ret));

            return 1;

        }

    }



    /* Write the stream header, if any. */

    ret = avformat_write_header(oc, &amp;opt);

    if (ret &lt; 0) {

        fprintf(stderr, "Error occurred when opening output file: %s\n",

                av_err2str(ret));

        return 1;

    }

    while (encode_video) {

        /* select the stream to encode */

    printf("######################\n");

        if (encode_video &amp;&amp;

            (av_compare_ts(video_st.next_pts, video_st.enc->time_base,STREAM_DURATION, (AVRational){ 1, 1 }) &lt;= 0)) {

            encode_video = !write_video_frame(oc, &amp;video_st);

        }

    }



    av_write_trailer(oc);



    /* Close each codec. */

    if (have_video)

        close_stream(oc, &amp;video_st);



    if (!(fmt->flags &amp; AVFMT_NOFILE))

        /* Close the output file. */

        avio_closep(&amp;oc->pb);



    /* free the stream */

    avformat_free_context(oc);



    return 0;

}```

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