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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. -
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 (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 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 (...)
Sur d’autres sites (10299)
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FFmpeg:A General error in an external library occurred when using FFmpeg6.1's avcodec_send_frame
4 janvier 2024, par MMingYI have the same code that can successfully push streams (rtmp) in the environment, but in the Android environment, I fail with an error message. The error message method is avcodec_send_frame in ffmpeg6.1. By the way, I compiled the FFmpeg library on Android myself, and I downloaded the official package for Win11. I will provide the code for Android and Win11 below.


android :


static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt,

 AVFormatContext *outFormatCtx) {
 int ret;

 /* send the frame to the encoder */
 if (frame)
 LOGE2("Send frame %ld\n", frame->pts);

 ret = avcodec_send_frame(enc_ctx, frame);
 if (ret < 0) {
 char errbuf[AV_ERROR_MAX_STRING_SIZE];
 av_strerror(ret, errbuf, AV_ERROR_MAX_STRING_SIZE);
 LOGE2("Error sending a frame for encoding ,%s\n", errbuf);
// exit(1);
 return;
 }

 while (ret >= 0) {
 ret = avcodec_receive_packet(enc_ctx, pkt);
 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 return;
 else if (ret < 0) {
 fprintf(stderr, "Error during encoding\n");
 exit(1);
 }

 printf("Write packet (size=%5d)\n", pkt->pts);
 /* ret = av_interleaved_write_frame(outFormatCtx, pkt);
 if (ret < 0) {
 LOGE2("write frame err=%s", av_err2str(ret));
 break;
 }*/
// printf("Write packet %3"PRId64" (size=%5d)\n", pkt->pts, pkt->size);
 av_write_frame(outFormatCtx, pkt); // Write the packet to the RTMP stream
 av_packet_unref(pkt);
 }
}

PUSHER_FUNC(int, testPush, jstring yuvPath, jstring outputPath) {
 const char *yvu_path = env->GetStringUTFChars(yuvPath, JNI_FALSE);
 const char *output_path = env->GetStringUTFChars(outputPath, JNI_FALSE);
 const char *rtmp_url = output_path;
 const AVCodec *codec;
 AVCodecContext *codecContext = NULL;
 AVFormatContext *outFormatCtx;
 int ret = 0;
 AVStream *outStream;
 AVFrame *frame;
 AVPacket *pkt;
 int i, x, y;
 avformat_network_init();

 codec = avcodec_find_encoder(AV_CODEC_ID_H264);
// codec = avcodec_find_encoder(AV_CODEC_ID_MPEG4);
// codec = avcodec_find_encoder(AV_CODEC_ID_H265);
 if (!codec) {
 LOGE2("JNI Error finding H.264 encoder");
 return -1;
 }
 codecContext = avcodec_alloc_context3(codec);
 if (!codecContext) {
 fprintf(stderr, "Could not allocate video codec context\n");
 return -1;
 }

 /* Allocate the output context */
 outFormatCtx = avformat_alloc_context();
 if (!outFormatCtx) {
 fprintf(stderr, "Could not allocate output context\n");
 return -1;
 }

 /* Open the RTMP output */
 const AVOutputFormat *ofmt = av_guess_format("flv", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("mpegts", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("mp4", NULL, NULL);
 if (!ofmt) {
 fprintf(stderr, "Could not find output format\n");
 return -1;
 }
 outFormatCtx->oformat = ofmt;
 outFormatCtx->url = av_strdup(rtmp_url);
 /* Add a video stream */
 outStream = avformat_new_stream(outFormatCtx, codec);
 if (!outStream) {
 fprintf(stderr, "Could not allocate stream\n");
 return -1;
 }
 outStream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 outStream->codecpar->codec_id = codec->id;
 outStream->codecpar->width = 352;
 outStream->codecpar->height = 288;

 /* Set the output URL */
 av_dict_set(&outFormatCtx->metadata, "url", rtmp_url, 0);

 pkt = av_packet_alloc();
 if (!pkt)
 return -1;

 /* ... (rest of the setup code) ... */
/* put sample parameters */
 codecContext->bit_rate = 400000;
 /* resolution must be a multiple of two */
 codecContext->width = 352;
 codecContext->height = 288;
 /* frames per second */
 codecContext->time_base = (AVRational) {1, 25};
 codecContext->framerate = (AVRational) {25, 1};

 /* emit one intra frame every ten frames
 * check frame pict_type before passing frame
 * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I
 * then gop_size is ignored and the output of encoder
 * will always be I frame irrespective to gop_size
 */
 codecContext->gop_size = 10;
 codecContext->max_b_frames = 1;
 codecContext->pix_fmt = AV_PIX_FMT_YUV420P;

 if (codec->id == AV_CODEC_ID_H264)
 av_opt_set(codecContext->priv_data, "preset", "slow", 0);

 /* open it */
 ret = avcodec_open2(codecContext, codec, NULL);
 if (ret < 0) {
 LOGE2("JNI Error opening codec eer%s", av_err2str(ret));
 return ret;
 }

 avcodec_parameters_to_context(codecContext, outStream->codecpar);

 if (avio_open(&outFormatCtx->pb, rtmp_url, AVIO_FLAG_WRITE)) {
 fprintf(stderr, "Could not open output\n");
 return ret;
 }
 /* Write the header */
 if (avformat_write_header(outFormatCtx, NULL) != 0) {
 fprintf(stderr, "Error occurred when opening output\n");
 return ret;
 }

 frame = av_frame_alloc();
 if (!frame) {
 fprintf(stderr, "Could not allocate video frame\n");
 return -1;
 }
 frame->format = codecContext->pix_fmt;
 frame->format = AV_PIX_FMT_YUV420P;
 frame->format = 0;
 frame->width = codecContext->width;
 frame->height = codecContext->height;

 ret = av_frame_get_buffer(frame, 0);
 if (ret < 0) {
 fprintf(stderr, "Could not allocate the video frame data ,%s\n", av_err2str(ret));
 return ret;
 }

 /* FILE *yuv_file = fopen(yvu_path, "rb");
 if (yuv_file == NULL) {
 LOGE2("cannot open h264 file");
 return -1;
 }*/

 /* encode 1 second of video */
 for (i = 0; i < 25000; i++) {
// for (i = 0; i < 25; i++) {
// fflush(stdout);

 /* make sure the frame data is writable */
 ret = av_frame_make_writable(frame);
 if (ret < 0)
 exit(1);

 /* prepare a dummy image */
 /* Y */
 for (y = 0; y < codecContext->height; y++) {
 for (x = 0; x < codecContext->width; x++) {
 frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3;
 }
 }

 /* Cb and Cr */
 for (y = 0; y < codecContext->height / 2; y++) {
 for (x = 0; x < codecContext->width / 2; x++) {
 frame->data[1][y * frame->linesize[1] + x] = 128 + y + i * 2;
 frame->data[2][y * frame->linesize[2] + x] = 64 + x + i * 5;
 }
 }

 frame->pts = i;

 /* encode the image */
 encode(codecContext, frame, pkt, outFormatCtx);
 }

// fclose(yuv_file);

 /* flush the encoder */
 encode(codecContext, NULL, pkt, outFormatCtx);

 /* Write the trailer */
 av_write_trailer(outFormatCtx);

 /* Close the output */
 avformat_free_context(outFormatCtx);

 avcodec_free_context(&codecContext);
 av_frame_free(&frame);
 av_packet_free(&pkt);
}


win11：


#include 
#include 
#include 

#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libavutil></libavutil>opt.h>
#include <libavutil></libavutil>imgutils.h>
#include <libavutil></libavutil>time.h>

static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt,
 AVFormatContext *outFormatCtx) {
 int ret;

 /* send the frame to the encoder */
 if (frame)
 printf("Send frame %3"PRId64"\n", frame->pts);

 ret = avcodec_send_frame(enc_ctx, frame);
 if (ret < 0) {
 char errbuf[AV_ERROR_MAX_STRING_SIZE];
 av_strerror(ret, errbuf, AV_ERROR_MAX_STRING_SIZE);
 fprintf(stderr, "Error sending a frame for encoding ,%s\n", errbuf);
 exit(1);
 }

 while (ret >= 0) {
 ret = avcodec_receive_packet(enc_ctx, pkt);
 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 return;
 else if (ret < 0) {
 fprintf(stderr, "Error during encoding\n");
 exit(1);
 }

 printf("Write packet %3"PRId64" (size=%5d)\n", pkt->pts, pkt->size);
 av_write_frame(outFormatCtx, pkt); // Write the packet to the RTMP stream
 av_packet_unref(pkt);
 }
}

int main(int argc, char **argv) {
 av_log_set_level(AV_LOG_DEBUG);
 const char *rtmp_url, *codec_name;
 const AVCodec *codec;
 AVCodecContext *codecContext = NULL;
 int i, ret, x, y;
 AVFormatContext *outFormatCtx;
 AVStream *st;
 AVFrame *frame;
 AVPacket *pkt;
 uint8_t endcode[] = {0, 0, 1, 0xb7};

 if (argc <= 3) {
 fprintf(stderr, "Usage: %s <rtmp url="url"> <codec>\n", argv[0]);
 exit(0);
 }
 rtmp_url = argv[1];
 codec_name = argv[2];
 avformat_network_init();
 /* find the mpeg1video encoder */
// codec = avcodec_find_encoder_by_name(codec_name);
// codec = avcodec_find_encoder(AV_CODEC_ID_MPEG4);
// codec = avcodec_find_encoder(AV_CODEC_ID_VP9);
// codec = avcodec_find_encoder(AV_CODEC_ID_MPEG2VIDEO);
// codec = avcodec_find_encoder(AV_CODEC_ID_H264);
 codec = avcodec_find_encoder(AV_CODEC_ID_H264);
// codec = avcodec_find_encoder(AV_CODEC_ID_AV1);
// codec = avcodec_find_encoder(AV_CODEC_ID_H265);
 if (!codec) {
 fprintf(stderr, "Codec '%s' not found\n", codec_name);
 exit(1);
 }
 codecContext = avcodec_alloc_context3(codec);
 if (!codecContext) {
 fprintf(stderr, "Could not allocate video codec context\n");
 exit(1);
 }

 /* Allocate the output context */
 outFormatCtx = avformat_alloc_context();
 if (!outFormatCtx) {
 fprintf(stderr, "Could not allocate output context\n");
 exit(1);
 }

 /* Open the RTMP output */
 const AVOutputFormat *ofmt = av_guess_format("flv", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("MKV", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("rtmp", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("mpegts", NULL, NULL);
// const AVOutputFormat *ofmt = av_guess_format("mp4", NULL, NULL);
 if (!ofmt) {
 fprintf(stderr, "Could not find output format\n");
 exit(1);
 }
 outFormatCtx->oformat = ofmt;
 outFormatCtx->url = av_strdup(rtmp_url);
 /* Add a video stream */
 st = avformat_new_stream(outFormatCtx, codec);
 if (!st) {
 fprintf(stderr, "Could not allocate stream\n");
 exit(1);
 }
 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 st->codecpar->codec_id = codec->id;
 st->codecpar->width = 352;
 st->codecpar->height = 288;
// st->codecpar = c;
// st->codecpar->format = AV_PIX_FMT_YUV420P;
 // Set video stream parameters
// st->codecpar->framerate = (AVRational){25, 1};

 /* Set the output URL */
 av_dict_set(&outFormatCtx->metadata, "url", rtmp_url, 0);


 pkt = av_packet_alloc();
 if (!pkt)
 exit(1);

 /* ... (rest of the setup code) ... */
/* put sample parameters */
 codecContext->bit_rate = 400000;
 /* resolution must be a multiple of two */
 codecContext->width = 352;
 codecContext->height = 288;
 /* frames per second */
 codecContext->time_base = (AVRational) {1, 25};
 codecContext->framerate = (AVRational) {25, 1};

 /* emit one intra frame every ten frames
 * check frame pict_type before passing frame
 * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I
 * then gop_size is ignored and the output of encoder
 * will always be I frame irrespective to gop_size
 */
 codecContext->gop_size = 10;
 codecContext->max_b_frames = 1;
 codecContext->pix_fmt = AV_PIX_FMT_YUV420P;

 if (codec->id == AV_CODEC_ID_H264)
 av_opt_set(codecContext->priv_data, "preset", "slow", 0);

 /* open it */
 ret = avcodec_open2(codecContext, codec, NULL);
 if (ret < 0) {
 fprintf(stderr, "Could not open codec: %s\n", av_err2str(ret));
 exit(1);
 }

 avcodec_parameters_to_context(codecContext, st->codecpar);

 if (avio_open(&outFormatCtx->pb, rtmp_url, AVIO_FLAG_WRITE)) {
 fprintf(stderr, "Could not open output\n");
 exit(1);
 }
 /* Write the header */
 if (avformat_write_header(outFormatCtx, NULL) != 0) {
 fprintf(stderr, "Error occurred when opening output\n");
 exit(1);
 }

 frame = av_frame_alloc();
 if (!frame) {
 fprintf(stderr, "Could not allocate video frame\n");
 exit(1);
 }
// frame->format = c->pix_fmt;
// frame->format = AV_PIX_FMT_YUV420P;
 frame->format = 0;
 frame->width = codecContext->width;
 frame->height = codecContext->height;

 ret = av_frame_get_buffer(frame, 0);
 if (ret < 0) {
 fprintf(stderr, "Could not allocate the video frame data ,%s\n", av_err2str(ret));
 exit(1);
 }

 /* encode 1 second of video */
 for (i = 0; i < 2500; i++) {
 /* ... (rest of the encoding loop) ... */
 fflush(stdout);

 /* make sure the frame data is writable */
 ret = av_frame_make_writable(frame);
 if (ret < 0)
 exit(1);

 /* prepare a dummy image */
 /* Y */
 for (y = 0; y < codecContext->height; y++) {
 for (x = 0; x < codecContext->width; x++) {
 frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3;
 }
 }

 /* Cb and Cr */
 for (y = 0; y < codecContext->height / 2; y++) {
 for (x = 0; x < codecContext->width / 2; x++) {
 frame->data[1][y * frame->linesize[1] + x] = 128 + y + i * 2;
 frame->data[2][y * frame->linesize[2] + x] = 64 + x + i * 5;
 }
 }

 frame->pts = i;

 /* encode the image */
 encode(codecContext, frame, pkt, outFormatCtx);
 }

 /* flush the encoder */
 encode(codecContext, NULL, pkt, outFormatCtx);

 /* Write the trailer */
 av_write_trailer(outFormatCtx);

 /* Close the output */
 avformat_free_context(outFormatCtx);

 avcodec_free_context(&codecContext);
 av_frame_free(&frame);
 av_packet_free(&pkt);

 return 0;
}
</codec></rtmp>

I suspect it's an issue with the ffmpeg library I compiled, so I searched for a step to compile ffmpeg on GitHub, but the package it compiled still has the same problem. I don't know what to do now.


-
FFmpeg encoding produces slightly incompatible MKV/MP4 container
11 juin 2018, par james2048I’ve been using the FFmpeg libraries to read and write media files using the C API.
So far, reading seems to be pretty straightforward. I am able to read frames which I can then process, convert to RGB, process, and then convert back to YUV420 to be encoded.
The encoded files play back with VLC media player fine, and Windows Media Player if I have a codec pack installed. However, they do behave strangely : the stock Windows 10 player won’t play them, same for Adobe Premiere. Also thumbnailers don’t work on it.
Basically it seems like nothing other than VLC or FFmpeg itself can play/process the file. I have seen this with both MP4 and MKV, so it is not a format-specific issue.The problems go away once you remux the file with FFmpeg, for example "ffmpeg -i input.mkv -c copy output.mkv". Everything can play the file correctly.
Also, the "remuxing.c" sample from the official samples works as well, with the same library version and compilers that I’m using (Visual Studio 2017, FFmpeg compiled with MinGW). It will fix the file and make it playable in all software.I’m not sure what could be causing this. I also don’t understand what the remuxing "fixed". It must be a container issue as the frames aren’t touched by remuxing.
I have analysed the output MKVs with FFprobe -show_packets. It seems to have budged the packet timestamps a little constant factor, and the output stream now has
is_avc=true and nal_length_size=4 instead of is_avc=false and nal_length_size=0, but apart from that the files are identical.Now here’s the output of FFprobe with the 3 last test packets, stream info and format info for both streams. As you can see, they are identical except for a couple of field. But something in here must have been "fixed" during remuxing to make it work.
[PACKET]
codec_type=video
stream_index=0
pts=59050
pts_time=59.050000
dts=58890
dts_time=58.890000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=427
pos=277358
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=58970
pts_time=58.970000
dts=58970
dts_time=58.970000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=205
pos=277792
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=59130
pts_time=59.130000
dts=59050
dts_time=59.050000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=268
pos=278004
flags=__
[/PACKET]
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=Main
codec_type=video
codec_time_base=1/2000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=720
height=576
coded_width=720
coded_height=576
has_b_frames=2
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuv420p
level=50
color_range=unknown
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=progressive
timecode=N/A
refs=1
is_avc=false
nal_length_size=0
id=N/A
r_frame_rate=299/12
avg_frame_rate=1000/1
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=737
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:DURATION=00:00:59.211000000
[/STREAM]
[FORMAT]
filename=testEncLeft.mkv
nb_streams=1
nb_programs=0
format_name=matroska,webm
format_long_name=Matroska / WebM
start_time=0.000000
duration=59.211000
size=278349
bit_rate=37607
probe_score=100
TAG:COMMENT=Slickline Player Export
TAG:ENCODER=Lavf57.83.100
[/FORMAT]And the info after remuxing, which works :
[PACKET]
codec_type=video
stream_index=0
pts=59050
pts_time=59.050000
dts=58890
dts_time=58.890000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=427
pos=277418
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=58970
pts_time=58.970000
dts=58970
dts_time=58.970000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=205
pos=277852
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=59130
pts_time=59.130000
dts=59050
dts_time=59.050000
duration=1
duration_time=0.001000
convergence_duration=N/A
convergence_duration_time=N/A
size=268
pos=278064
flags=__
[/PACKET]
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=Main
codec_type=video
codec_time_base=1/2000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=720
height=576
coded_width=720
coded_height=576
has_b_frames=2
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuv420p
level=50
color_range=unknown
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=progressive
timecode=N/A
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=299/12
avg_frame_rate=1000/1
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=737
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:DURATION=00:00:59.212000000
[/STREAM]
[FORMAT]
filename=fixedLeft.mkv
nb_streams=1
nb_programs=0
format_name=matroska,webm
format_long_name=Matroska / WebM
start_time=0.000000
duration=59.212000
size=278409
bit_rate=37615
probe_score=100
TAG:COMMENT=Slickline Player Export
TAG:ENCODER=Lavf58.12.100
[/FORMAT]Here is how I’m setting up the output context, for reference : it’s pretty standard, following the sample code.
int ret;
avformat_alloc_output_context2(&outputFormatCtx, nullptr, nullptr, outFilePath.c_str());
av_dict_set(&outputFormatCtx->metadata, "comment", "FFmpeg Export", 0);
if (!outputFormatCtx)
{
LOG_AND_THROW("Could not allocate output context");
}
outputVideoStream = avformat_new_stream(outputFormatCtx, nullptr);
outputVideoStream->time_base = AVRational{ 1, AV_TIME_BASE }; // Stream timebase will be used by codec
if (!outputVideoStream)
{
LOG_AND_THROW("Failed allocating output stream");
}
// defaults to "libx264"
AVCodec *outCodec = avcodec_find_encoder_by_name(selectedCodecName.c_str());
if (!outCodec)
{
LOG_AND_THROW("Failed finding output codec");
}
AVDictionary *opts = nullptr;
if (selectedCodecName == "libx264")
{
opts = getX264CodecOptions();
}
encoderCtx = avcodec_alloc_context3(outCodec);
if (!encoderCtx)
{
LOG_AND_THROW("Failed to allocate the encoder context");
}
encoderCtx->width = width;
encoderCtx->height = height;
encoderCtx->pix_fmt = AV_PIX_FMT_YUV420P;
// time base for the frames we will provide to the encoder
encoderCtx->time_base = AVRational{ 1, AV_TIME_BASE };
// convert framerate from double to rational
encoderCtx->framerate = AVRational{ (int)(frameRate * AV_TIME_BASE), AV_TIME_BASE};
// Match encoderCtx time base for the stream
outputVideoStream->time_base = encoderCtx->time_base;
ret = avcodec_open2(encoderCtx, outCodec, &opts);
if (ret < 0)
{
LOG_AND_THROW_PARAM("Cannot open video encoder for stream: %d", ret);
}
// Fill in some params for MP4 stream, details about encoder
ret = avcodec_parameters_from_context(outputVideoStream->codecpar, encoderCtx);
if (ret < 0)
{
LOG_AND_THROW_PARAM("Failed to copy encoder parameters to output stream: %d", ret);
}
if (outputFormatCtx->oformat->flags & AVFMT_GLOBALHEADER)
{
encoderCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}
av_dump_format(outputFormatCtx, 0, filePath.c_str(), 1);
// End of encoder settings, setting up MP4
if (!(outputFormatCtx->oformat->flags & AVFMT_NOFILE))
{
ret = avio_open(&outputFormatCtx->pb, outFilePath.c_str(), AVIO_FLAG_WRITE);
if (ret < 0)
{
LOG_AND_THROW_PARAMSTR("Could not open output file '%s'", outFilePath.c_str());
}
}
ret = avformat_write_header(outputFormatCtx, nullptr);
if (ret < 0)
{
LOG_AND_THROW_PARAM("Error occurred when opening output file for writing: %d", ret);
}Can anyone help me figure out why the container is not playing properly ?
Thanks in advance.
-James
-
ffmpeg got stuck while trying to crossfade merge two videos
30 juin 2017, par JeflopoI’m trying to do a crossfade merge (1s) between two videos. An intro (39secs duration) video with the main video. When I executed the command it started working without throwing errors but at some frame ffmpeg gets stuck.
I read a lot of q/a here in stackoverflow, and the official docs but I can’t solve this so :
This is the command :
ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex \
"[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; \
[0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; \
[1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; \
[1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; \
[fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; \
[fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; \
[fadein]fifo[fadeinfifo]; \
[fadeout]fifo[fadeoutfifo]; \
[fadeoutfifo][fadeinfifo]overlay[crossfade]; \
[firstclip][crossfade][secondclip]concat=n=3[output]; \
[0:a][1:a] acrossfade=d=1 [audio]" -vcodec libx264 -map "[output]" -map "[audio]" "outputs/240p.mp4"Here’s the raw command (the exact command I used) :
ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex "[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; [0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; [fadein]fifo[fadeinfifo]; [fadeout]fifo[fadeoutfifo]; [fadeoutfifo][fadeinfifo]overlay[crossfade]; [firstclip][crossfade][secondclip]concat=n=3[output]; [0:a][1:a] acrossfade=d=1 [audio]" -vcodec libx264 -map "[output]" -map "[audio]" "outputs/240p.mp4"The "error" is reproducible with and without the
-anand theacrossfadefilters.This is the output :
PS C:\scripts\ffmpeg> ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex "[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; [0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; [fadein]fifo[fadeinfifo]; [fadeout]fifo[fadeoutfifo]; [fadeoutfifo][fadeinfifo]overlay[crossfade]; [firstclip][crossfade][secondclip]concat=n=3[output]; [0:a][1:a] acrossfade=d=1 [audio]" -map "[output]" -map "[audio]" "outputs/240p.mp4"
ffmpeg version N-86669-gc1d1274 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.1.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
libavutil 55. 67.100 / 55. 67.100
libavcodec 57.100.102 / 57.100.102
libavformat 57. 75.100 / 57. 75.100
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 94.100 / 6. 94.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'inputs/intro.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.72.101
Duration: 00:06:24.45, start: 0.000000, bitrate: 491 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 426x240 [SAR 1:1 DAR 71:40], 353 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'inputs/240p.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.40.101
Duration: 00:06:24.43, start: 0.000000, bitrate: 375 kb/s
Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 426x240 [SAR 1:1 DAR 71:40], 243 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 (h264) -> trim
Stream #0:0 (h264) -> trim
Stream #0:1 (aac) -> acrossfade:crossfade0
Stream #1:0 (h264) -> trim
Stream #1:0 (h264) -> trim
Stream #1:1 (aac) -> acrossfade:crossfade1
concat -> Stream #0:0 (libx264)
acrossfade -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 00000000026b2240] using SAR=1/1
[libx264 @ 00000000026b2240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000000026b2240] profile High, level 2.1
[libx264 @ 00000000026b2240] 264 - core 152 r2851 ba24899 - 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=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=7 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 'outputs/240p.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.75.100
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 426x240 [SAR 1:1 DAR 71:40], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
encoder : Lavc57.100.102 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
encoder : Lavc57.100.102 aac
frame=10369 fps=503 q=28.0 size= 24064kB time=00:06:55.68 bitrate= 474.2kbits/s speed=20.2xAt frame 10000 it gets stuck... I waited for 1hour but it keeps stuck.
I’ve updated ffmpeg :
ffmpeg -version
ffmpeg version N-86669-gc1d1274 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.1.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
libavutil 55. 67.100 / 55. 67.100
libavcodec 57.100.102 / 57.100.102
libavformat 57. 75.100 / 57. 75.100
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 94.100 / 6. 94.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100I used these references :
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