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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (32)
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Mise à jour de la version 0.1 vers 0.2
24 juin 2013, parExplications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...) -
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. -
Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...)
Sur d’autres sites (6276)
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flient-ffmpeg getting error as "ffmpeg exited with code 1 : pipe:0 : Invalid data found when processing input"
6 avril 2023, par Abhishek RawalI am trying to create API where i need to get uploaded video and create thumbnail from that video. But conditions are :


- 

- Video should not store on local disk
- Once thumbnail is create it should not store on local disk, instead it should directly uploaded to AWS s3 bucket.






Following is the code i am trying with :




const ffmpeg = require('fluent-ffmpeg');
const stream = require('stream');

router.post('/thumbnail', upload.any(), (req, res) => {
 const videoBuffer = req.files[0].buffer;
 
 let readableVideoBuffer = new stream.PassThrough();
 readableVideoBuffer.write(videoBuffer);
 readableVideoBuffer.end()
 
 let bufferStream = new stream.PassThrough();
 
 ffmpeg(readableVideoBuffer)
 .on('filenames', function(filenames) {
 console.log('Will generate ' + filenames.join(', '))
 })
 .on('end', function() {
 console.log('Screenshots taken');
 })
 .on('error', (err) => {
 console.log(err);
 })
 .screenshots({
 count: 4,
 size: '100x100',
 timestamps: ['00:00:01.000'],
 })
 .writeToStream(bufferStream, { end: true }); /* while using this statement i am getting error */
 
 const buffers = [];
 bufferStream.on('data', function (buf) {
 buffers.push(buf);
 });
 bufferStream.on('end', function () {
 const outputBuffer = Buffer.concat(buffers);
 // use s3 bucket code here
 console.log('outputBuffer===========>', outputBuffer)
 });
})






so while calling this API my app is crashing and i am getting error as :




Error : ffmpeg exited with code 1 : pipe:0 : Invalid data found when
processing input




Blockquote


If i am not using this statement :




.writeToStream(bufferStream, end : true ) ;




then able to save file but in local disk, which is not required in my case.


Please help me to understand what is wrong in this code, how i can resolve it.
Any type of help is appreciated.


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ffmpeg - data is being "removed" while h264 is being processed by ffmpeg
21 mai 2024, par LakiI got a file which is created based on messages coming from streaming, all of the "messages" are ending with b'h264\x00'
I got a need to


- 

- load the data into ffmpeg
- perform some processing of the data
- re-attach the data to same "messages"








Data is loaded with ffmpeg and saved with ffmpeg - however - ffmpeg removes "part" of the data
I have simplified the process and currently I am only loading and saving the data, without any processing, but still - part of the data is being removed


I have used several commands - but always, part of my data is being removed


ffmpeg -i sthg3.h264 -c copy st3.h264
ffmpeg -err_detect ignore_err -i sthg3.h264 -c copy st3.h264
ffmpeg -fflags +genpts -i sthg3.h264 -c copy st3.h264 


I have created the script for calculating that


file_out = 'sthg3.h264'
def split_file(input_file,chunki):
 output_files = []
 with open(input_file, 'rb') as f:
 file_number = 0
 while True:
 chunk = f.read(504096) # Read a chunk of data
 if not chunk: # End of file
 break
 index = chunk.find(chunki) # Find the delimiter
 while index != -1:
 chunk = chunk[index+len(chunki):]
 file_number += 1
 index = chunk.find(chunki) # Find the next delimiter
 return file_number

chunki = b'h264\x00'
print(split_file(file_out,chunki))
chunki = b'\x00\x01\x00'
print(split_file(file_out,chunki))
 
chunki = b'h264\x00'
#chunki = b'\x00\x00\xdc\x9e'
print(split_file('st3.h264',chunki))
chunki = b'\x00\x01\x00'
print(split_file('st3.h264',chunki))


and here is the question, how to push data through ffmpeg to avoid removing data, or replace it with something that would not be removed ?


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AVPacket->Data is empty "0/0" but has size
24 juin 2024, par CottonBudsI am using libAV* to encode frames(unsigned char*) from my streaming application. I encoded my initialized frames but when I tried to get the avpacket. it returns an avpacket with a size but without data inside it "0/0"


here is my code


StreamCodec.h



class StreamCodec : public QObject 
{
 Q_OBJECT
public:
 StreamCodec(int height, int width, int fps);

public slots:
 void encodeFrame(std::shared_ptr<uchar> pData);
 void run();

signals:
 void encodeFinish(AVPacket* packet);

private:
 void initializeSWS();
 void initializeCodec();

 AVPacket* allocatepacket(AVFrame* frame);
 AVFrame* allocateFrame(std::shared_ptr<uchar> pData);
 AVFrame* formatFrame(AVFrame* frame);

 const AVCodec* codec;
 AVCodecContext* context;
 SwsContext *swsContext;
 int bytesPerPixel;
 int width;
 int height;
 int fps;
 int pts = 0;
};

</uchar></uchar>

StreamCodec.cpp


StreamCodec::StreamCodec(int height, int width, int fps)
{
 this->height = height;
 this->width = width;
 this->fps = fps;
}

void StreamCodec::initializeCodec()
{
 codec = avcodec_find_encoder(AV_CODEC_ID_H264);
 if (!codec) {
 qDebug() << "Codec not found";
 exit(1);
 }
 
 context = avcodec_alloc_context3(codec);
 if (!context) {
 qDebug() << "Could not allocate codec context";
 exit(1);
 }

 context->height = height;
 context->width = width;
 context->time_base.num = 1;
 context->time_base.den = fps;
 context->framerate.num = fps;
 context->framerate.den = 1;
 context->pix_fmt = AV_PIX_FMT_YUV420P;

 context->gop_size = 0;

 av_opt_set(context->priv_data, "preset", "ultrafast", 0);
 av_opt_set(context->priv_data, "crf", "35", 0);
 av_opt_set(context->priv_data, "tune", "zerolatency", 0);

 auto desc = av_pix_fmt_desc_get(AV_PIX_FMT_BGRA);
 if (!desc){
 qDebug() << "Can't get descriptor for pixel format";
 exit(1);
 }
 bytesPerPixel = av_get_bits_per_pixel(desc) / 8;
 if(av_get_bits_per_pixel(desc) % 8 != 0){
 qDebug() << "Unhandled bits per pixel, bad in pix fmt";
 exit(1);
 }

 int err = avcodec_open2(context, codec, nullptr);
 if (err < 0) {
 qDebug() << "Could not open codec";
 exit(1);
 }
}
void StreamCodec::initializeSWS()
{
 swsContext = sws_getContext(width, height, AV_PIX_FMT_BGRA, width, height, AV_PIX_FMT_YUV420P, SWS_BILINEAR, NULL, NULL, NULL);
 if (!swsContext) {
 qDebug() << "Could not allocate SWS Context";
 exit(1);
 }
}

void StreamCodec::encodeFrame(std::shared_ptr<uchar> pData)
{
 int err = 0;
 AVFrame* frame1 = allocateFrame(pData);
 AVFrame* frame = formatFrame(frame1);

 err = avcodec_send_frame(context, frame);
 if (err < 0) {
 qDebug() << "Error sending frame to codec";
 char* errStr = new char;
 av_make_error_string(errStr, 255, err);
 qDebug() << errStr;
 av_frame_free(&frame);
 exit(1);
 }

 while (true) {
 AVPacket* packet = allocatepacket(frame);
 err = avcodec_receive_packet(context, packet);
 if (err == AVERROR_EOF || err == AVERROR(EAGAIN) ) {
 av_packet_unref(packet);
 av_packet_free(&packet);
 break;
 }
 if (err < 0) {
 qDebug() << "Error recieving to codec";
 char* errStr = new char;
 av_make_error_string(errStr, 255, err);
 qDebug() << errStr;
 av_frame_free(&frame);
 av_frame_free(&frame1);
 av_packet_free(&packet);
 exit(1);
 }
 emit encodeFinish(packet);
 }

 av_frame_free(&frame);
 av_frame_free(&frame1);
}

void StreamCodec::run()
{
 initializeCodec();
 initializeSWS();
}

AVPacket* StreamCodec::allocatepacket(AVFrame* frame)
{
 AVPacket* packet = av_packet_alloc();
 if (!packet) {
 qDebug() << "Could not allocate memory for packet";
 av_frame_free(&frame);
 exit(1);
 }
 return packet;
}

AVFrame* StreamCodec::allocateFrame(std::shared_ptr<uchar> pData)
{
 AVFrame* frame = av_frame_alloc();
 if (!frame) {
 qDebug() << "Could not allocate memory for frame";
 exit(1);
 }

 frame->format = AV_PIX_FMT_BGRA;
 frame->width = width;
 frame->height = height;
 frame->pts = pts;

 if (av_frame_get_buffer(frame, 0) < 0) {
 qDebug() << "Failed to get frame buffer";
 exit(1);
 }

 if (av_frame_make_writable(frame) < 0) {
 qDebug() << "Failed to make frame writable";
 exit(1);
 }

 frame->data[0] = pData.get();

 return frame;
}

AVFrame* StreamCodec::formatFrame(AVFrame* frame)
{
 AVFrame* yuvFrame = av_frame_alloc();
 if (!yuvFrame) {
 qDebug() << "Unable to allocate memory for yuv frame";
 av_frame_free(&frame);
 exit(1);
 }

 yuvFrame->format = context->pix_fmt;
 yuvFrame->width = width;
 yuvFrame->height = height;
 yuvFrame->pts = pts;
 pts += 1;
 
 if (av_frame_get_buffer(yuvFrame, 0) < 0) {
 qDebug() << "Failed to get frame buffer";
 exit(1);
 }

 if (av_frame_make_writable(yuvFrame) < 0) {
 qDebug() << "Failed to make frame writable";
 exit(1);
 }

 int err = sws_scale(swsContext, (const uint8_t* const*)frame->data, frame->linesize, 0, height, (uint8_t* const*)yuvFrame->data, yuvFrame->linesize);
 if (err < 0) {
 qDebug() << "Could not format frame to yuv420p";
 exit(1);
 }
 return yuvFrame;
}


</uchar></uchar>

I tried checking for the frames and I'm pretty sure the data is there. I just dont know what to do at this point.


edit 1


I tried viewing the data using visual studio code "view" button it showed me this




Thank you so much to all that commented and pointed me to the right direction.


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