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Autres articles (103)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...)
Sur d’autres sites (14852)
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convert pcm stream data to encoded aac data
24 décembre 2019, par KumarI tried to convert pulse-audio pcm stream data to aac encoded data using ffmpeg.
But after encoding I get noise-full data, not the correct one. Here I post my code, anyone help me with some ideas.Initial configuration :
av_register_all();
int error;
if ((error = avio_open(&output_io_context,"out.aac",AVIO_FLAG_WRITE))<0) {
printf("could not open output file\n");
}
if (!(output_format_context = avformat_alloc_context())) {
printf("output_format_context error\n");
}
output_format_context->pb = output_io_context;
if(!(output_format_context->oformat = av_guess_format(NULL, "out.aac", NULL))) {
printf("guess format error\n");
}
codec = avcodec_find_encoder(AV_CODEC_ID_AAC);
if (codec == NULL) {
printf("avcodec_find_encoder: ERROR\n");
}
if (!(stream = avformat_new_stream(output_format_context, NULL))) {
printf("stream create error\n");
}
output_codec_context = avcodec_alloc_context3(codec);
if(!output_codec_context) {
printf("output_codec_context is null\n");
}
output_codec_context->channels = CHANNELS;
output_codec_context->channel_layout = av_get_default_channel_layout(CHANNELS);
output_codec_context->sample_rate = SAMPLE_RATE; //input_codec_context->sample_rate;
output_codec_context->sample_fmt = codec->sample_fmts[0];
output_codec_context->bit_rate = 48000; //OUTPUT_BIT_RATE;
stream->time_base.den = SAMPLE_RATE;//input_codec_context->sample_rate;
stream->time_base.num = 1;
if(output_format_context->oformat->flags & AVFMT_GLOBALHEADER)
output_codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
if ((error = avcodec_open2(output_codec_context, codec, NULL)) < 0) {
printf("error");
}
error = avcodec_parameters_from_context(stream->codecpar, output_codec_context);
if (write_output_file_header(output_format_context)) {
printf("write header failure...\n");
}Data encoding :
AVFrame *output_frame;
int frame_pos = 0, ctx_frame_size = output_codec_context->frame_size;
int size = av_samples_get_buffer_size(NULL, CHANNELS,
output_codec_context->frame_size,output_codec_context->sample_fmt, 1);
if((x = avcodec_fill_audio_frame(output_frame, CHANNELS,
output_codec_context->sample_fmt, data, length, 1)) < 0) {
printf("avcodec_fill_audio_frame error : %s\n", av_err2str(x));
}
int data_written;
if (encode_audio_frame(output_frame, output_format_context,
output_codec_context, &data_written)) {
printf("encode_audio_frame error\n");
}
av_frame_free(&output_frame);helper_function :
int encode_audio_frame(AVFrame *frame,AVFormatContext *output_format_context,
AVCodecContext *output_codec_context, int *data_present)
{
AVPacket output_packet;
int error;
init_packet(&output_packet);
if (frame) {
frame->pts = pts;
pts += frame->nb_samples;
}
error = avcodec_send_frame(output_codec_context, frame);
if (error == AVERROR_EOF) {
error = 0;
goto cleanup;
} else if (error < 0) {
fprintf(stderr, "Could not send packet for encoding (error '%s')\n",
av_err2str(error));
return error;
}
error = avcodec_receive_packet(output_codec_context, &output_packet);
if (error == AVERROR(EAGAIN)) {
error = 0;
goto cleanup;
} else if (error == AVERROR_EOF) {
error = 0;
goto cleanup;
} else if (error < 0) {
fprintf(stderr, "Could not encode frame (error '%s')\n",
av_err2str(error));
goto cleanup;
} else {
*data_present = 1;
}
if (*data_present &&
(error = av_write_frame(output_format_context, &output_packet)) < 0) {
fprintf(stderr, "Could not write frame (error '%s')\n",
av_err2str(error));
goto cleanup;
}
cleanup:
av_packet_unref(&output_packet);
return error;
}- Do we need to fill AVFrame with sizeof(av_samples_get_buffer_size) or context->frame_size ?
TYIA :) !!
- Do we need to fill AVFrame with sizeof(av_samples_get_buffer_size) or context->frame_size ?
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How to convert mp3 data to wav data ?
12 mai 2023, par YaliI have a wav audio file and i extracted data from that wav using python pydub module and i got this data


[-139 18 -215 34 -196 6 -295 -31 -301 -35 -211 13 -93 47
-60 39 -58 7 -17 2]


(this is first 10 data i got more than 1 million data)


from pydub import AudioSegment
import numpy as np

song = AudioSegment.from_file("test.wav")
extract_data = np.array(song.get_array_of_samples())
print(extract_data[:10])



then i converted wav to mp3 using that module and again extracted data from mp3 file and i got this data


[-108 7 -193 24 -223 11 -239 -31 -248 -43 -203 -10 -101 23
-14 24 10 15 24 16]


(this is first 10 data i got more than 1 million data)


song = AudioSegment.from_file("test.wav")
song.export("test.mp3")
mp3_song = AudioSegment.from_file("test.mp3")
extract_data = np.array(mp3_song.get_array_of_samples())
print(extract_data[:10])



and again i converted mp3 to wav now i got mp3 data instead of wav data.


mp3_song = AudioSegment.from_file("test.mp3")
mp3_song.export("test1.wav", format="wav")

song = AudioSegment.from_file("test1.wav")
extract_data = np.array(song.get_array_of_samples())
print(extract_data[:10])



My point is how to convert mp3 data to original wav data ?


please help me,


Thanks.


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aarch64 : Use .data.rel.ro for const data with relocations
16 novembre 2014, par Martin Storsjöaarch64 : Use .data.rel.ro for const data with relocations
This reverts commit c00365b46d464ce47716315c1801818d811bdb9a
in addition to using a different section.Signed-off-by : Martin Storsjö <martin@martin.st>