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Médias (21)
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1,000,000
27 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Demon Seed
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Four of Us are Dying
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Corona Radiata
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Lights in the Sky
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Head Down
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Sur d’autres sites (7465)
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Is there any problem in my FFMPEG encoder client code ?
29 janvier 2024, par kyhnzI am trying to write code have function of capture video stream, encode as hevc265 and send to server as UDP :


// There can some unnecessary library imports, rule 1: If it is ok, don't touch it!

#include <iostream>
#include <sys></sys>types.h>
#include 
#include <cstring>
#include <sys></sys>socket.h>
#include <arpa></arpa>inet.h>
#include <netinet></netinet>in.h> 
#include <string>
#include <cstdlib>
#include <cstdio>

extern "C"
{
#include <libavutil></libavutil>frame.h>
#include <libavdevice></libavdevice>avdevice.h>
#include <libavformat></libavformat>avformat.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavutil></libavutil>imgutils.h>
#include <libavcodec></libavcodec>packet.h>
#include <libavcodec></libavcodec>codec_id.h>
#include <libavutil></libavutil>error.h>
#include <libavutil></libavutil>error.h>
#include <libavutil></libavutil>opt.h>
}

#define PORT 9999
#define IP_ADDRESS "127.0.0.1"

using namespace std;

int main(){
 const int width = 1080;
 const int height = 720;
 const int fps = 18; 
 const auto resulation = "1080x720";
 const auto device = "/dev/video0";
 const auto format = "v4l2";
 const AVCodecID codec_id = AV_CODEC_ID_H265;

 avdevice_register_all();
 avformat_network_init();
 AVFormatContext *formatContext = nullptr;

 AVDictionary *format_opts = nullptr;
 av_dict_set(&format_opts, "framerate", "18", 0);;
 av_dict_set(&format_opts, "video_size", resulation, 0);
 
 const AVInputFormat *inputFormat = av_find_input_format(format);
 if (!inputFormat)
 {
 cerr << "Unknown input format: " << format << endl;
 return 1;
 }
 cout << "Input format: "<< format << endl;

 const AVCodec *codec = avcodec_find_encoder(codec_id);
 if (!codec) {
 cerr << "Codec can't find "<< codec_id << endl;
 return 1;
 }
 cout << "Found codec: "<< codec_id << endl;

 AVCodecContext *avctx = avcodec_alloc_context3(codec);
 if (!avctx) {
 cerr << "Error: Could not create encoder!" << endl;
 return 1;
 }
 cout << "Create encoder. " << endl;


 avctx->bit_rate = 1000000;
 avctx->width = width; 
 avctx->height = height; 
 avctx->pix_fmt = AV_PIX_FMT_YUV420P; 
 avctx->time_base = (AVRational){1, fps};
 avctx->framerate = (AVRational){fps, 1};
 avctx->gop_size = fps*2;
 avctx->refs = 3;

 av_opt_set(avctx->priv_data, "preset", "medium", 0);
 av_opt_set(avctx->priv_data, "crf", "18", 0);
 av_opt_set(avctx->priv_data, "tune", "zerolatency", 0);

 if (avcodec_open2(avctx, codec, nullptr) < 0) {
 cerr << "Error: Couldn't open codec" << endl;
 return 1;
 }
 cout << "Open codec succesfully." << endl;

 int open_input = avformat_open_input(&formatContext, device,
 const_cast<avinputformat>(inputFormat), &format_opts);
 if (open_input != 0)
 {
 cerr << "Device cant open " << device << endl;
 return 1;
 }
 cout << "Device active: " << device <width = avctx->width;
 frame->height = avctx->height;
 frame->format = avctx->pix_fmt;

 if(av_frame_get_buffer(frame, 0) != 0){
 cerr << "Error: video frame " << endl;
 return 1;
 }cout << "Video frame has been created." << endl;

 if(av_frame_make_writable(frame) != 0){
 cerr << "Error: frame is not writable" << endl;
 return 1;
 }

 AVPacket *packet= av_packet_alloc();
 if (!packet) {
 cerr << "error: has not been created packet" << endl;
 }

 av_dump_format(formatContext, 0, device, 0);
 av_dict_free(&format_opts);
 
 int socket_client = socket(AF_INET, SOCK_DGRAM, 0);
 if (socket_client == -1) {
 cerr << "Error: socket!" << endl;
 exit(EXIT_FAILURE);
 }
 cout << "Socket has been created" << endl;

 struct sockaddr_in serverAddr = {0};
 serverAddr.sin_family = AF_INET;
 serverAddr.sin_port = htons(PORT);
 serverAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);

 while (true) {
 if (av_read_frame(formatContext, packet) != 0) {
 cerr << "Error" << endl;
 av_packet_unref(packet);
 continue;
 }

 frame->data[7] = packet->data; 
 frame->linesize[7] = packet->size;

 if (avcodec_send_frame(avctx, frame) != 0){
 cerr << "Error: Frame sending is missing ---> "<< &av_strerror << endl;
 av_packet_unref(packet);
 continue;
 }

 if (avcodec_receive_packet(avctx, packet) != 0){
 cerr << "Error: Packet giving is missing! ---> " << &av_strerror << endl;
 av_packet_unref(packet);
 continue;
 }

 ssize_t snd = sendto(socket_client, packet->data, packet->size,
 MSG_CONFIRM, (struct sockaddr *)&serverAddr,
 sizeof(serverAddr));

 if(snd == -1){
 cerr << "Error: Data sending failed !" << endl;
 av_packet_unref(packet);
 continue;
 }else {
 cout << "Data sending succesfully" << endl;
 }

 av_packet_unref(packet);
 av_frame_unref(frame);
 }

 av_frame_free(&frame);
 av_packet_free(&packet);
 close(socket_client);
 avformat_free_context(formatContext);
 avformat_close_input(&formatContext);
 avformat_network_deinit();

 return 0;
}
</avinputformat></cstdio></cstdlib></string></cstring></iostream>

There is such an output, I do not understand the reason yet :


[video4linux2,v4l2 @ 0x643732e80b40] The V4L2 driver changed the video from 1080x720 to 1280x720
[video4linux2,v4l2 @ 0x643732e80b40] The V4L2 driver changed the video from 1280x720 to 640x480
[video4linux2,v4l2 @ 0x643732e80b40] The driver changed the time per frame from 1/18 to 1/30


Is there any problem in my encoder client code ?


In addition, i can't send datas to server.


-
Motion : Raspian webcam Unable to find a compatible palette format
25 juin 2018, par mrtumnusI am trying to get a Creative Live ! Motion webcam working on a Raspberry Pi 3 B+.
fswebcamandmotionboth give an error, "Unable to find a compatible palette format".ffmpeg, on the other hand, is able to easily capture video from the webcam.Device info :
$ lsusb
Bus 001 Device 004: ID 041e:4041 Creative Technology, Ltd Webcam Live! Motion`
$ v4l2-ctl --all
Driver Info (not using libv4l2):
Driver name : sq930x
Card type : Creative WebCam Live! Motion
Bus info : usb-3f980000.usb-1.2
Driver version: 4.14.34
Capabilities : 0x85200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x05200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Priority: 2
Video input : 0 (sq930x: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'RGGB'
Field : None
Bytes per Line : 640
Size Image : 307200
Colorspace : sRGB
Transfer Function : Default
YCbCr/HSV Encoding: Default
Quantization : Default
Flags :
Streaming Parameters Video Capture:
Frames per second: invalid (0/0)
Read buffers : 2
User Controls
exposure (int) : min=1 max=4095 step=1 default=854 value=854
gain (int) : min=1 max=255 step=1 default=141 value=141Log of
motionfailure to open device :$ cat /var/log/motion/motion.log
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] motion_startup: Using log type (ALL) log level (NTC)
[0:motion] [NTC] [ENC] [Jun 24 16:16:42] ffmpeg_init: ffmpeg libavcodec version 57.48.101 libavformat version 57.41.100
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Motion running in setup mode.
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is from /etc/motion/motion.conf
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is device: /dev/video0 input -1
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Stream port 8081
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Waiting for threads to finish, pid: 12067
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] http_bindsock: listening on 127.0.0.1 port 8080
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] motion_init: Camera 0 started: motion detection Enabled
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] httpd_run: Started motion-httpd server on port 8080 (auth Disabled)
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using videodevice /dev/video0 and input -1
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability:
------------------------
cap.driver: "sq930x"
cap.card: "Creative WebCam Live! Motion"
cap.bus_info: "usb-3f980000.usb-1.2"
cap.capabilities=0x85200001
------------------------
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - VIDEO_CAPTURE
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - READWRITE
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - STREAMING
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: name = "sq930x", type 0x00000002, status 00000000
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: - CAMERA
[1:ml1] [WRN] [VID] [Jun 24 16:16:42] v4l2_select_input: Device doesn't support VIDIOC_G_STD
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Config palette index 17 (YU12) doesn't work.
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Supported palettes:
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: (0) RGGB (8-bit Bayer RGRG/GBGB)
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: 0 - 8-bit Bayer RGRG/GBGB (compressed : 0) (0x42474752)
[1:ml1] [ERR] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Unable to find a compatible palette format.
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using V4L1
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] image_ring_resize: Resizing pre_capture buffer to 1 items
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_init: Error capturing first image
[1:ml1] [NTC] [STR] [Jun 24 16:16:52] http_bindsock: listening on 127.0.0.1 port 8081
[1:ml1] [NTC] [ALL] [Jun 24 16:16:52] motion_init: Started motion-stream server on port 8081 (auth Disabled)
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_loop: Video device fatal error - Closing video device
[1:ml1] [NTC] [VID] [Jun 24 16:16:52] vid_close: Closing video device /dev/video0Successful
ffmpegrecording :$ ffmpeg -i /dev/video0 test.mp4
ffmpeg version 3.2.10-1~deb9u1+rpt1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
configuration: --prefix=/usr --extra-version='1~deb9u1+rpt1' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[video4linux2,v4l2 @ 0x16035c0] Time per frame unknown
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 2523.746120, bitrate: N/A
Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 640x480, 25.42 tbr, 1000k tbn, 1000k tbcRelated questions :
-
avcodec/v4l2 : set sizeimage param for non-raw buffers [fixes #6716]
4 octobre 2017, par Jorge Ramirez-Ortizavcodec/v4l2 : set sizeimage param for non-raw buffers [fixes #6716]
Some V4L2 drivers fail to allocate buffers when sizeimage is not set
to a max value. This is indeed the case for s5p-mfc [1]Most drivers should be able to calculate this value from the frame
dimensions and format - or at least have their own default.However since this work around should not impact those drivers doing
the "right thing" this commit just provides such a default.The calculations were extracted from the v4l2 driver used to develop
the ffmpeg v4l2_m2m support [2]. See venc.c and vdec.c[1] linux.git/drivers/media/platform/s5p-mfc
[2] linux.git/drivers/media/platform/qcom/venus/
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