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Autres articles (53)

Personnaliser en ajoutant son logo, sa bannière ou son image de fond

5 septembre 2013, par kent1

Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
MediaSPIP v0.2

21 juin 2013, par kent1

MediaSPIP 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 (...)
Publier sur MédiaSpip

13 juin 2013

Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 18

Sur d’autres sites (7312)

WASAPI resampling

30 juin 2013, par magingax

I am trying to play 24bit/48000 Hz audio on PC. my PC seems not support 32bit sample (event GetMixFormat return 32bit/44100Hz device)
So I'm trying to convert 24bit/4800Hz audio into 16bit/44100Hz
but It sound like noise.
sample audio file 'titan.wav' is 24bit/48000Hz s32 format
below is sample code

#define WINVER 0x0600

#define _WIN32_WINNT 0x0600



#include 

#include <iostream>

#include "Mmdeviceapi.h"

#include "Audioclient.h"

#include "Endpointvolume.h"

using namespace std;



extern "C"

{

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

#include <libavcodec></libavcodec>avcodec.h>

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

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

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

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

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

}



#define MAX_AUDIO_FRAME_SIZE    192000

#define REFTIMES_PER_SEC      10000000  // 1 sec   100ns

#define REFTIMES_PERMILLISEC     10000

const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);

const IID   IID_IMMDeviceEnumerator  = __uuidof(IMMDeviceEnumerator);

const IID   IID_IAudioClient         = __uuidof(IAudioClient);

const IID   IID_IAudioRenderClient   = __uuidof(IAudioRenderClient);





int alloc_samples_array_and_data(uint8_t*** data, int *linesize, int nb_channels,int nb_samples, enum AVSampleFormat sample_fmt, int align)

{

    int nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1;

    *data = (uint8_t**)av_malloc(sizeof(*data) * nb_planes);

    return av_samples_alloc(*data, linesize, nb_channels,nb_samples, sample_fmt, align);

}







int main()

{

    HRESULT hr;

    REFERENCE_TIME       buf_duration_request = REFTIMES_PER_SEC;

    REFERENCE_TIME       buf_duration_actual;

    IMMDeviceEnumerator  *pEnumerator      = NULL;

    IMMDevice            *pDevice          = NULL;

    IAudioClient         *pAudioClient     = NULL;

    IAudioRenderClient   *pRenderClient    = NULL;

    IAudioEndpointVolume *endpoint_vol     = NULL;

    WAVEFORMATEX         *fmt              = NULL;

    UINT32               frame_total       = 0;   // total frames in buffer

    UINT32               frame_avail       = 0;   // available frame number in buffer

    UINT32               frame_fill        = 0;   // filled frames

    BYTE                 *pData            = NULL;

    FILE                 *file_audio       = NULL;

    BYTE                 *buf              = NULL;

    DWORD                flags             = 0;





    CoInitializeEx(NULL,COINIT_MULTITHREADED);

    CoCreateInstance (CLSID_MMDeviceEnumerator,NULL,CLSCTX_ALL,IID_IMMDeviceEnumerator, (void**)&amp;pEnumerator);

    pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &amp;pDevice);

    pDevice->Activate(IID_IAudioClient, CLSCTX_ALL, NULL, (void**)&amp;pAudioClient);

    pDevice->Activate(__uuidof(IAudioEndpointVolume),CLSCTX_ALL,NULL,(void**)&amp;endpoint_vol);

    pAudioClient->GetMixFormat((WAVEFORMATEX**)&amp;fmt);





    fmt->wFormatTag      = WAVE_FORMAT_PCM;

    fmt->nChannels       = 2 ; 

    fmt->nSamplesPerSec  = 44100;

    fmt->wBitsPerSample  = 16;

    fmt->nBlockAlign     = fmt->nChannels * (fmt->wBitsPerSample/8);

    fmt->nAvgBytesPerSec = fmt->nSamplesPerSec * fmt->nBlockAlign;  

    fmt->cbSize          = 0;



    WAVEFORMATEX* closest_format = NULL;

    hr = pAudioClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, fmt ,&amp;closest_format);

    hr = pAudioClient->Initialize(AUDCLNT_SHAREMODE_SHARED, NULL ,buf_duration_request,0, fmt ,NULL);

    hr = pAudioClient->GetBufferSize(&amp;frame_total);

    hr = pAudioClient->GetService(IID_IAudioRenderClient,(void**)&amp;pRenderClient);



    int file_size = 0;  

    int buf_size  = 44100 * 4;  

    int read_ret  = 0;

    int read_acc  = 0;



    fopen_s(&amp;file_audio,"E:\\MOVIE\\titan.wav","rb"); 

    fseek (file_audio , 0 , SEEK_END);

    file_size = ftell (file_audio);

    rewind (file_audio);

    buf  = (BYTE*) malloc(buf_size);



    pRenderClient->GetBuffer(frame_total,&amp;pData);

    read_ret  = fread(buf,1,buf_size,file_audio);

    read_acc += read_ret;

    memcpy(pData,buf,buf_size); 

    pRenderClient->ReleaseBuffer(frame_total,flags);



    buf_duration_actual = (double) REFTIMES_PER_SEC * frame_total / fmt->nSamplesPerSec;

    pAudioClient->Start();





    //-- resample

    uint8_t** src_data;

    uint8_t** dst_data;

    int       src_bufsize        = 0;

    int       dst_bufsize        = 0;

    int       src_linesize       = 0;

    int       dst_linesize       = 0;

    int       src_nb_channels    = 0;

    int       dst_nb_channels    = 0;

    int       src_nb_samples     = 1024;

    int       dst_nb_samples     = 0;

    int       max_dst_nb_samples = 0;

    int       ret = 0;

    SwrContext* swr_ctx = NULL;

    swr_ctx = swr_alloc();

    av_opt_set_int        (swr_ctx,"in_channel_layout" , AV_CH_LAYOUT_MONO,   0);

    av_opt_set_int        (swr_ctx,"in_sample_rate"    , 48000,0);

    av_opt_set_sample_fmt (swr_ctx,"in_sample_fmt"     , AV_SAMPLE_FMT_S32,   0);

    av_opt_set_int        (swr_ctx,"out_channel_layout", AV_CH_LAYOUT_STEREO, 0);

    av_opt_set_int        (swr_ctx,"out_sample_rate"   , 44100,0);

    av_opt_set_sample_fmt (swr_ctx,"out_sample_fmt"    , AV_SAMPLE_FMT_S16, 0);

    ret = swr_init(swr_ctx);



    src_nb_channels    = av_get_channel_layout_nb_channels(AV_CH_LAYOUT_MONO);

    src_nb_samples     = src_nb_channels * 48000;

    dst_nb_samples     = av_rescale_rnd(src_nb_samples, 44100,48000,AV_ROUND_UP);

    max_dst_nb_samples = dst_nb_samples;

    alloc_samples_array_and_data(&amp;src_data,&amp;src_linesize,src_nb_channels,src_nb_samples, AV_SAMPLE_FMT_S32,0);  



    dst_nb_channels    = av_get_channel_layout_nb_channels(AV_CH_LAYOUT_STEREO);

    alloc_samples_array_and_data(&amp;dst_data,&amp;dst_linesize,dst_nb_channels,dst_nb_samples, AV_SAMPLE_FMT_S16,0);

    //-- end resample





    while (read_acc &lt; file_size) 

    {

    Sleep(buf_duration_actual/REFTIMES_PERMILLISEC/2);          

        pAudioClient->GetCurrentPadding(&amp;frame_fill);

        frame_avail    = frame_total - frame_fill;

        dst_nb_samples = frame_avail;       

        src_nb_samples = av_rescale_rnd(dst_nb_samples,48000,44100,AV_ROUND_UP);

        src_bufsize    = av_samples_get_buffer_size(&amp;src_linesize,src_nb_channels,src_nb_samples,AV_SAMPLE_FMT_S32,1);



        cout&lt;&lt;"FILLED:"&lt;GetBuffer(frame_avail, &amp;pData );    

        read_ret    = fread(src_data[0],1,src_bufsize,file_audio);

        read_acc   += read_ret;

        ret         = swr_convert(swr_ctx,dst_data,dst_nb_samples,(const uint8_t**)src_data,src_nb_samples);

        dst_bufsize = av_samples_get_buffer_size(&amp;dst_linesize,dst_nb_channels,ret,AV_SAMPLE_FMT_S16,1);

        memcpy(pData, dst_data[0], dst_bufsize);        

        hr = pRenderClient->ReleaseBuffer(frame_avail,flags);                   



    }





    pAudioClient->Stop();

    CoTaskMemFree(fmt);

    pEnumerator->Release();

    pDevice->Release();

    pAudioClient->Release();

    pRenderClient->Release();

    CoUninitialize();



    return 0;

}

</iostream>

FFMPEG 0.6.5 Commands

10 novembre 2015, par j.edga
I need to use ffmpeg version 0.6.5 for doings things like
- transcribing to different formats ;
- changing the quality ;
- taking a still-frame shot ;
- get the total video durations
amongst other things.

I have tried a couple of commands, but they don’t work. How can I do what I want to ?

FFmpeg adding 0.05 seconds of silence to transcoded AAC file ?

29 octobre 2015, par FTLRalph

In Java, I’m using FFmpeg to convert a WAV file to AAC with the function :

-i input.wav -ac 1 -ab 64000 -ar 22050 output.aac

When I open these two files in Audacity, I can clearly see that the AAC file is 0.05 seconds longer, with 0.05 seconds of silence added to the beginning.

This is an issue when I try to mux this AAC file with a video file - the audio doesn’t sync up.

Is there some sort of parameter to prevent this behavior or another way to get around this issue ?

Edit - Console output while running the function :

10-28 17:47:10.845: I/System.out(14784): FFmpeg: Running the function: -i "input.wav" -ac 1 -ab 64000 -ar 22050 "output.aac"

10-28 17:47:10.845: I/System.out(14784): FFmpeg function: onStart()

10-28 17:47:10.865: D/FFmpeg(14784): Running publishing updates method

10-28 17:47:10.865: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784): ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavutil      54.  7.100 / 54.  7.100

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavcodec     56.  1.100 / 56.  1.100

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavformat    56.  4.101 / 56.  4.101

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libavdevice    56.  0.100 / 56.  0.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libavfilter     5.  1.100 /  5.  1.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libswscale      3.  0.100 /  3.  0.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libswresample   1.  1.100 /  1.  1.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libpostproc    53.  0.100 / 53.  0.100

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.895: I/System.out(14784): Guessed Channel Layout for  Input Stream #0.0 : mono

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.895: I/System.out(14784): Input #0, wav, from 'input.wav':

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.900: I/System.out(14784):   Duration: 00:00:02.50, bitrate: 352 kb/s

10-28 17:47:10.900: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.900: I/System.out(14784):     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784): Output #0, adts, to 'output.aac':

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):   Metadata:

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     encoder         : Lavf56.4.101

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     Stream #0:0: Audio: aac, 22050 Hz, mono, fltp, 64 kb/s

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     Metadata:

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):       encoder         : Lavc56.1.100 aac

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784): Stream mapping:

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784):   Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784): Press [q] to stop, [?] for help

10-28 17:47:11.395: D/dalvikvm(14784): JIT unchain all for threadid=16

10-28 17:47:11.420: D/dalvikvm(14784): GC_FOR_ALLOC freed 4698K, 40% free 7190K/11964K, paused 271ms, total 272ms

10-28 17:47:11.420: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:11.420: I/System.out(14784): size=      12kB time=00:00:02.50 bitrate=  37.7kbits/s    

10-28 17:47:11.455: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:11.455: I/System.out(14784): video:0kB audio:11kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.363914%

10-28 17:47:11.470: I/System.out(14784): FFmpeg function: onSuccess(), message:

10-28 17:47:11.470: I/System.out(14784): ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers

10-28 17:47:11.470: I/System.out(14784):   built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)

10-28 17:47:11.470: I/System.out(14784):   configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

10-28 17:47:11.470: I/System.out(14784):   libavutil      54.  7.100 / 54.  7.100

10-28 17:47:11.470: I/System.out(14784):   libavcodec     56.  1.100 / 56.  1.100

10-28 17:47:11.470: I/System.out(14784):   libavformat    56.  4.101 / 56.  4.101

10-28 17:47:11.470: I/System.out(14784):   libavdevice    56.  0.100 / 56.  0.100

10-28 17:47:11.470: I/System.out(14784):   libavfilter     5.  1.100 /  5.  1.100

10-28 17:47:11.470: I/System.out(14784):   libswscale      3.  0.100 /  3.  0.100

10-28 17:47:11.470: I/System.out(14784):   libswresample   1.  1.100 /  1.  1.100

10-28 17:47:11.470: I/System.out(14784):   libpostproc    53.  0.100 / 53.  0.100

10-28 17:47:11.470: I/System.out(14784): Guessed Channel Layout for  Input Stream #0.0 : mono

10-28 17:47:11.470: I/System.out(14784): Input #0, wav, from 'input.wav':

10-28 17:47:11.470: I/System.out(14784):   Duration: 00:00:02.50, bitrate: 352 kb/s

10-28 17:47:11.475: I/System.out(14784):     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s

10-28 17:47:11.475: I/System.out(14784): Output #0, adts, to 'output.aac':

10-28 17:47:11.475: I/System.out(14784):   Metadata:

10-28 17:47:11.475: I/System.out(14784):     encoder         : Lavf56.4.101

10-28 17:47:11.475: I/System.out(14784):     Stream #0:0: Audio: aac, 22050 Hz, mono, fltp, 64 kb/s

10-28 17:47:11.475: I/System.out(14784):     Metadata:

10-28 17:47:11.475: I/System.out(14784):       encoder         : Lavc56.1.100 aac

10-28 17:47:11.475: I/System.out(14784): Stream mapping:

10-28 17:47:11.475: I/System.out(14784):   Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))

10-28 17:47:11.475: I/System.out(14784): Press [q] to stop, [?] for help

10-28 17:47:11.475: I/System.out(14784): size=      12kB time=00:00:02.50 bitrate=  37.7kbits/s    

10-28 17:47:11.475: I/System.out(14784): video:0kB audio:11kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.363914%

10-28 17:47:11.475: I/System.out(14784): FFmpeg function: onFinish()

1 | ... | 2192 | 2193 | 2194 | 2195 | 2196 | 2197 | 2198 | 2199 | 2200 | ... | 2438

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Personnaliser en ajoutant son logo, sa bannière ou son image de fond

MediaSPIP v0.2

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WASAPI resampling

FFMPEG 0.6.5 Commands

FFmpeg adding 0.05 seconds of silence to transcoded AAC file ?

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