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#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
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16 octobre 2011, par
Mis à jour : Février 2013
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Mis à jour : Février 2013
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using ffmpeg libraray to write to a mp4, ffprobe shows there are 100 frames and 100 packets, but av_interleaved_write_frame only called 50 times
2 mai 2023, par ollydbg23here is my code to generate a mp4 file by using ffmpeg and opencv library. The opencv library is only try to generate 100 images(frames), and ffmpeg library is to compress the images to a mp4 files.


Here is the working code :


#include <iostream>
#include <vector>
#include <cstring>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <opencv2></opencv2>opencv.hpp>
extern "C" {
#include <libavutil></libavutil>imgutils.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libavutil></libavutil>opt.h>
}

#include<cstdlib> // to generate time stamps

using namespace std;
using namespace cv;

int main()
{
 // Set up input frames as BGR byte arrays
 vector<mat> frames;

 int width = 640;
 int height = 480;
 int num_frames = 100;
 Scalar black(0, 0, 0);
 Scalar white(255, 255, 255);
 int font = FONT_HERSHEY_SIMPLEX;
 double font_scale = 1.0;
 int thickness = 2;

 for (int i = 0; i < num_frames; i++) {
 Mat frame = Mat::zeros(height, width, CV_8UC3);
 putText(frame, std::to_string(i), Point(width / 2 - 50, height / 2), font, font_scale, white, thickness);
 frames.push_back(frame);
 }

 // generate a serial of time stamps which is used to set the PTS value
 // suppose they are in ms unit, the time interval is between 30ms to 59ms
 vector<int> timestamps;

 for (int i = 0; i < num_frames; i++) {
 int timestamp;
 if (i == 0)
 timestamp = 0;
 else
 {
 int random = 30 + (rand() % 30);
 timestamp = timestamps[i-0] + random;
 }

 timestamps.push_back(timestamp);
 }

 // Populate frames with BGR byte arrays

 // Initialize FFmpeg
 //av_register_all();

 // Set up output file
 AVFormatContext* outFormatCtx = nullptr;
 //AVCodec* outCodec = nullptr;
 AVCodecContext* outCodecCtx = nullptr;
 //AVStream* outStream = nullptr;
 //AVPacket outPacket;

 const char* outFile = "output.mp4";
 int outWidth = frames[0].cols;
 int outHeight = frames[0].rows;
 int fps = 25;

 // Open the output file context
 avformat_alloc_output_context2(&outFormatCtx, nullptr, nullptr, outFile);
 if (!outFormatCtx) {
 cerr << "Error: Could not allocate output format context" << endl;
 return -1;
 }

 // Open the output file
 if (avio_open(&outFormatCtx->pb, outFile, AVIO_FLAG_WRITE) < 0) {
 cerr << "Error opening output file" << std::endl;
 return -1;
 }

 // Set up output codec
 const AVCodec* outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
 if (!outCodec) {
 cerr << "Error: Could not find H.264 codec" << endl;
 return -1;
 }

 outCodecCtx = avcodec_alloc_context3(outCodec);
 if (!outCodecCtx) {
 cerr << "Error: Could not allocate output codec context" << endl;
 return -1;
 }
 outCodecCtx->codec_id = AV_CODEC_ID_H264;
 outCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
 outCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
 outCodecCtx->width = outWidth;
 outCodecCtx->height = outHeight;
 //outCodecCtx->time_base = { 1, fps*1000 }; // 25000
 outCodecCtx->time_base = { 1, fps}; // 25000
 outCodecCtx->framerate = {fps, 1}; // 25
 outCodecCtx->bit_rate = 4000000;

 //https://github.com/leandromoreira/ffmpeg-libav-tutorial
 //We set the flag AV_CODEC_FLAG_GLOBAL_HEADER which tells the encoder that it can use the global headers.
 if (outFormatCtx->oformat->flags & AVFMT_GLOBALHEADER)
 {
 outCodecCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; //
 }

 // Open output codec
 if (avcodec_open2(outCodecCtx, outCodec, nullptr) < 0) {
 cerr << "Error: Could not open output codec" << endl;
 return -1;
 }

 // Create output stream
 AVStream* outStream = avformat_new_stream(outFormatCtx, outCodec);
 if (!outStream) {
 cerr << "Error: Could not allocate output stream" << endl;
 return -1;
 }

 // Configure output stream parameters (e.g., time base, codec parameters, etc.)
 // ...

 // Connect output stream to format context
 outStream->codecpar->codec_id = outCodecCtx->codec_id;
 outStream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 outStream->codecpar->width = outCodecCtx->width;
 outStream->codecpar->height = outCodecCtx->height;
 outStream->codecpar->format = outCodecCtx->pix_fmt;
 outStream->time_base = outCodecCtx->time_base;

 int ret = avcodec_parameters_from_context(outStream->codecpar, outCodecCtx);
 if (ret < 0) {
 cerr << "Error: Could not copy codec parameters to output stream" << endl;
 return -1;
 }

 outStream->avg_frame_rate = outCodecCtx->framerate;
 //outStream->id = outFormatCtx->nb_streams++; <--- We shouldn't modify outStream->id

 ret = avformat_write_header(outFormatCtx, nullptr);
 if (ret < 0) {
 cerr << "Error: Could not write output header" << endl;
 return -1;
 }

 // Convert frames to YUV format and write to output file
 int frame_count = -1;
 for (const auto& frame : frames) {
 frame_count++;
 AVFrame* yuvFrame = av_frame_alloc();
 if (!yuvFrame) {
 cerr << "Error: Could not allocate YUV frame" << endl;
 return -1;
 }
 av_image_alloc(yuvFrame->data, yuvFrame->linesize, outWidth, outHeight, AV_PIX_FMT_YUV420P, 32);

 yuvFrame->width = outWidth;
 yuvFrame->height = outHeight;
 yuvFrame->format = AV_PIX_FMT_YUV420P;

 // Convert BGR frame to YUV format
 Mat yuvMat;
 cvtColor(frame, yuvMat, COLOR_BGR2YUV_I420);
 memcpy(yuvFrame->data[0], yuvMat.data, outWidth * outHeight);
 memcpy(yuvFrame->data[1], yuvMat.data + outWidth * outHeight, outWidth * outHeight / 4);
 memcpy(yuvFrame->data[2], yuvMat.data + outWidth * outHeight * 5 / 4, outWidth * outHeight / 4);

 // Set up output packet
 //av_init_packet(&outPacket); //error C4996: 'av_init_packet': was declared deprecated
 AVPacket* outPacket = av_packet_alloc();
 memset(outPacket, 0, sizeof(outPacket)); //Use memset instead of av_init_packet (probably unnecessary).
 //outPacket->data = nullptr;
 //outPacket->size = 0;

 // set the frame pts, do I have to set the package pts?

 // yuvFrame->pts = av_rescale_q(timestamps[frame_count]*25, outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp
 yuvFrame->pts = av_rescale_q(frame_count*frame_count, outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp

 // Encode frame and write to output file
 int ret = avcodec_send_frame(outCodecCtx, yuvFrame);
 if (ret < 0) {
 cerr << "Error: Could not send frame to output codec" << endl;
 return -1;
 }
 while (ret >= 0)
 {
 ret = avcodec_receive_packet(outCodecCtx, outPacket);

 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 {
 int abc;
 abc++;
 break;
 }
 else if (ret < 0)
 {
 cerr << "Error: Could not receive packet from output codec" << endl;
 return -1;
 }

 //av_packet_rescale_ts(&outPacket, outCodecCtx->time_base, outStream->time_base);

 outPacket->stream_index = outStream->index;

 outPacket->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base); // Set packet duration

 ret = av_interleaved_write_frame(outFormatCtx, outPacket);

 static int call_write = 0;

 call_write++;
 printf("av_interleaved_write_frame %d\n", call_write);

 av_packet_unref(outPacket);
 if (ret < 0) {
 cerr << "Error: Could not write packet to output file" << endl;
 return -1;
 }
 }

 av_frame_free(&yuvFrame);
 }

 // Flush the encoder
 ret = avcodec_send_frame(outCodecCtx, nullptr);
 if (ret < 0) {
 std::cerr << "Error flushing encoder: " << std::endl;
 return -1;
 }

 while (ret >= 0) {
 AVPacket* pkt = av_packet_alloc();
 if (!pkt) {
 std::cerr << "Error allocating packet" << std::endl;
 return -1;
 }
 ret = avcodec_receive_packet(outCodecCtx, pkt);

 // Write the packet to the output file
 if (ret == 0)
 {
 pkt->stream_index = outStream->index;
 pkt->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base); // <---- Set packet duration
 ret = av_interleaved_write_frame(outFormatCtx, pkt);
 av_packet_unref(pkt);
 if (ret < 0) {
 std::cerr << "Error writing packet to output file: " << std::endl;
 return -1;
 }
 }
 }


 // Write output trailer
 av_write_trailer(outFormatCtx);

 // Clean up
 avcodec_close(outCodecCtx);
 avcodec_free_context(&outCodecCtx);
 avformat_free_context(outFormatCtx);

 return 0;
}

</int></mat></cstdlib></stdexcept></sstream></fstream></cstring></vector></iostream>

Note that I have used the
ffprobetool(one of the tool from ffmpeg) to inspect the generated mp4 files.

I see that the mp4 file has 100 frames and 100 packets, but in my code, I have such lines :


static int call_write = 0;

 call_write++;
 printf("av_interleaved_write_frame %d\n", call_write);


I just see that the
av_interleaved_write_framefunction is only called 50 times, not the expected 100 times, anyone can explain it ?

Thanks.


BTW, from the ffmpeg document( see here : For video, it should typically contain one compressed frame ), I see that a
packetmainly has one videoframe, so theffprobe's result looks correct.

Here is the command I used to inspect the mp4 file :


ffprobe -show_frames output.mp4 >> frames.txt
ffprobe -show_packets output.mp4 >> packets.txt


My testing code is derived from an answer in another question here : avformat_write_header() function call crashed when I try to save several RGB data to a output.mp4 file


-
ffmpeg : single frame from video is highly overexposed image
9 avril 2021, par mcgregor94086I am using ffmpeg on a Raspberry Pi 400, attached to a camera array to capture one image from each camera.


Most images generated are highly overexposed and washed out. I am trying to understand which command line options I should set to prevent this over exposure.



Are there options I need to set for the camera to automatically set the right exposure, or some way to set the length of an exposure as opposed to just a "frame" ?


Also, each image is taking about 3 to 4 seconds to capture. I just want to capture the first possible frame and that's it. Is there a set of options which would capture the image is less time ?


/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video0 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam00.jpg
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 672949.710856, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x184adb0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam00.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=3.7 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.39x 
video:37kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video0 image in: 3 seconds
linux_capture_photo_and_return_image_path( /dev/video0 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 1 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam00.jpg
1 /dev/video0: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam00.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video2 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam02.jpg
Input #0, video4linux2,v4l2, from '/dev/video2':
 Duration: N/A, start: 672958.327329, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1d27db0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam02.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=8.6 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.374x 
video:136kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video2 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video2 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 2 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam02.jpg
2 /dev/video2: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam02.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video4 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam04.jpg
Input #0, video4linux2,v4l2, from '/dev/video4':
 Duration: N/A, start: 672963.021864, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x10bedb0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam04.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=3.7 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.389x 
video:42kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video4 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video4 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 3 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam04.jpg
3 /dev/video4: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam04.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video6 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam06.jpg
Input #0, video4linux2,v4l2, from '/dev/video6':
 Duration: N/A, start: 672967.663385, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x24e4db0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam06.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=8.2 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.352x 
video:126kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video6 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video6 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 4 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam06.jpg
4 /dev/video6: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam06.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video8 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam08.jpg
Input #0, video4linux2,v4l2, from '/dev/video8':
 Duration: N/A, start: 672972.189025, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x13fadb0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam08.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=9.1 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.352x 
video:154kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video8 image in: 3 seconds
linux_capture_photo_and_return_image_path( /dev/video8 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 5 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam08.jpg
5 /dev/video8: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam08.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video17 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam17.jpg
Input #0, video4linux2,v4l2, from '/dev/video17':
 Duration: N/A, start: 672976.730667, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0xae6e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam17.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=8.7 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.353x 
video:164kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video17 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video17 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 6 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam17.jpg
6 /dev/video17: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam17.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video19 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam19.jpg
Input #0, video4linux2,v4l2, from '/dev/video19':
 Duration: N/A, start: 672981.425451, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x15a7e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam19.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=3.2 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.391x 
video:40kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video19 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video19 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 7 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam19.jpg
7 /dev/video19: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam19.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video21 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam21.jpg
Input #0, video4linux2,v4l2, from '/dev/video21':
 Duration: N/A, start: 672986.050603, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1722e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam21.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=7.8 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.388x 
video:119kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video21 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video21 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 8 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam21.jpg
8 /dev/video21: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam21.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video23 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam23.jpg
Input #0, video4linux2,v4l2, from '/dev/video23':
 Duration: N/A, start: 672990.712888, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x19f4e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam23.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=3.4 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.389x 
video:42kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video23 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video23 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 9 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam23.jpg
9 /dev/video23: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam23.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video25 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam25.jpg
Input #0, video4linux2,v4l2, from '/dev/video25':
 Duration: N/A, start: 672995.359539, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x9d7e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam25.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=8.4 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.369x 
video:146kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video25 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video25 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 10 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam25.jpg
10 /dev/video25: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam25.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video27 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam27.jpg
Input #0, video4linux2,v4l2, from '/dev/video27':
 Duration: N/A, start: 673000.069328, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1f90e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam27.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=3.9 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.382x 
video:135kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video27 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video27 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 11 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam27.jpg
11 /dev/video27: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam27.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video29 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam29.jpg
Input #0, video4linux2,v4l2, from '/dev/video29':
 Duration: N/A, start: 673004.676618, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x22dde20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam29.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=1.0 q=9.3 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.385x 
video:165kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video29 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video29 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 12 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam29.jpg
12 /dev/video29: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam29.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video31 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam31.jpg
Input #0, video4linux2,v4l2, from '/dev/video31':
 Duration: N/A, start: 673009.555417, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x22f5e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam31.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.8 q=8.6 Lsize=N/A time=00:00:00.40 bitrate=N/A speed=0.335x 
video:141kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video31 image in: 4 seconds
linux_capture_photo_and_return_image_path( /dev/video31 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 13 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam31.jpg
13 /dev/video31: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam31.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video33 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam33.jpg
Input #0, video4linux2,v4l2, from '/dev/video33':
 Duration: N/A, start: 673014.171570, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x6d4e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam33.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.9 q=9.7 Lsize=N/A time=00:00:00.20 bitrate=N/A speed=0.172x 
video:156kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video33 image in: 3 seconds
linux_capture_photo_and_return_image_path( /dev/video33 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 14 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam33.jpg
14 /dev/video33: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam33.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video35 -frames:v 1 -f image2 /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam35.jpg
Input #0, video4linux2,v4l2, from '/dev/video35':
 Duration: N/A, start: 673018.565769, bitrate: 165888 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 165888 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1667e20] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam35.jpg':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg, yuvj422p(pc), 1920x1080, q=2-31, 200 kb/s, 5 fps, 5 tbn, 5 tbc
 Metadata:
 encoder : Lavc58.35.100 mjpeg
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 0 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
frame= 1 fps=0.8 q=9.8 Lsize=N/A time=00:00:00.20 bitrate=N/A speed=0.167x 
video:148kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

Captured /dev/video35 image in: 3 seconds
linux_capture_photo_and_return_image_path( /dev/video35 , /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/ , 15 ) RETURNS /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam35.jpg
15 /dev/video35: /var/www/html/sonascan/data/scans/10000000e1f45394/20210405184504/SonaCam35.jpg
/usr/bin/ffmpeg -y -hide_banner -ss 0:0:0 -r 15 -s 1920x1080 -f video4linux2 -i /dev/video37 -frames:v 1 -f image2



$ v4l2-ctl --all
Driver Info:
 Driver name : uvcvideo
 Card type : FHD Camera: FHD Camera
 Bus info : usb-0000:01:00.0-1.2.1.1
 Driver version : 5.10.17
 Capabilities : 0x84a00001
 Video Capture
 Metadata Capture
 Streaming
 Extended Pix Format
 Device Capabilities
 Device Caps : 0x04200001
 Video Capture
 Streaming
 Extended Pix Format
Media Driver Info:
 Driver name : uvcvideo
 Model : FHD Camera: FHD Camera
 Serial : 
 Bus info : usb-0000:01:00.0-1.2.1.1
 Media version : 5.10.17
 Hardware revision: 0x00000001 (1)
 Driver version : 5.10.17
Interface Info:
 ID : 0x03000002
 Type : V4L Video
Entity Info:
 ID : 0x00000001 (1)
 Name : FHD Camera: FHD Camera
 Function : V4L2 I/O
 Flags : default
 Pad 0x01000007 : 0: Sink
 Link 0x02000013: from remote pad 0x100000a of entity 'Extension 4': Data, Enabled, Immutable
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
 Width/Height : 1920/1080
 Pixel Format : 'YUYV' (YUYV 4:2:2)
 Field : None
 Bytes per Line : 3840
 Size Image : 4147200
 Colorspace : sRGB
 Transfer Function : Rec. 709
 YCbCr/HSV Encoding: ITU-R 601
 Quantization : Default (maps to Limited Range)
 Flags : 
Crop Capability Video Capture:
 Bounds : Left 0, Top 0, Width 1920, Height 1080
 Default : Left 0, Top 0, Width 1920, Height 1080
 Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 1920, Height 1080, Flags: 
Selection: crop_bounds, Left 0, Top 0, Width 1920, Height 1080, Flags: 
Streaming Parameters Video Capture:
 Capabilities : timeperframe
 Frames per second: 5.000 (5/1)
 Read buffers : 0
 brightness 0x00980900 (int) : min=0 max=255 step=1 default=128 value=128
 contrast 0x00980901 (int) : min=0 max=255 step=1 default=30 value=30
 saturation 0x00980902 (int) : min=0 max=100 step=1 default=64 value=64
 hue 0x00980903 (int) : min=-180 max=180 step=1 default=0 value=0
 white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
 gamma 0x00980910 (int) : min=90 max=150 step=1 default=120 value=120
 gain 0x00980913 (int) : min=4 max=8 step=1 default=5 value=5
 power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
 white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=1 default=4000 value=4000 flags=inactive
 sharpness 0x0098091b (int) : min=0 max=7 step=1 default=2 value=2
 backlight_compensation 0x0098091c (int) : min=0 max=2 step=1 default=2 value=2
 exposure_auto 0x009a0901 (menu) : min=0 max=3 default=3 value=3
 exposure_absolute 0x009a0902 (int) : min=9 max=2500 step=1 default=123 value=123 flags=inactive
error 22 getting ext_ctrl Exposure, Auto Priority


-
Merge commit ’f726fc21ef76a8ba3445448066f7b2a687fbca16’
1er février 2015, par Michael Niedermayer
Syndiquer tout le site
