#include "opencv2/core/utility.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
#include <string>
#include <iostream>
using namespace std;
using namespace cv;
class GStreamerPipeline
{
public:
// Preprocessing arguments command line
GStreamerPipeline(int argc, char *argv[])
{
const string keys =
"{h help usage ? | | print help messages }"
"{m mode | | coding mode (supported: encode, decode) }"
"{p pipeline |default | pipeline name (supported: 'default', 'gst-basic', 'gst-vaapi', 'gst-libav', 'ffmpeg') }"
"{ct container |mp4 | container name (supported: 'mp4', 'mov', 'avi', 'mkv') }"
"{cd codec |h264 | codec name (supported: 'h264', 'h265', 'mpeg2', 'mpeg4', 'mjpeg', 'vp8') }"
"{f file path | | path to file }"
"{vr resolution |720p | video resolution for encoding (supported: '720p', '1080p', '4k') }"
"{fps |30 | fix frame per second for encoding (supported: fps > 0) }"
"{fm fast | | fast measure fps }";
cmd_parser = new CommandLineParser(argc, argv, keys);
cmd_parser->about("This program shows how to read a video file with GStreamer pipeline with OpenCV.");
if (cmd_parser->has("help"))
{
cmd_parser->printMessage();
exit_code = -1;
}
fast_measure = cmd_parser->has("fast"); // fast measure fps
fix_fps = cmd_parser->get<int>("fps"); // fixed frame per second
pipeline = cmd_parser->get<string>("pipeline"), // gstreamer pipeline type
container = cmd_parser->get<string>("container"), // container type
mode = cmd_parser->get<string>("mode"), // coding mode
codec = cmd_parser->get<string>("codec"), // codec type
file_name = cmd_parser->get<string>("file"), // path to videofile
resolution = cmd_parser->get<string>("resolution"); // video resolution
if (!cmd_parser->check())
{
cmd_parser->printErrors();
exit_code = -1;
}
exit_code = 0;
}
~GStreamerPipeline() { delete cmd_parser; }
// Start pipeline
int run()
{
if (exit_code < 0) { return exit_code; }
if (mode == "decode") { if (createDecodePipeline() < 0) return -1; }
else if (mode == "encode") { if (createEncodePipeline() < 0) return -1; }
else
{
cout << "Unsupported mode: " << mode << endl;
cmd_parser->printErrors();
return -1;
}
cout << "_____________________________________" << endl;
cout << "Pipeline " << mode << ":" << endl;
cout << stream_pipeline.str() << endl;
// Choose a show video or only measure fps
cout << "_____________________________________" << endl;
cout << "Start measure frame per seconds (fps)" << endl;
cout << "Loading ..." << endl;
vector<double> tick_counts;
cout << "Start " << mode << ": " << file_name;
cout << " (" << pipeline << ")" << endl;
while(true)
{
int64 temp_count_tick = 0;
if (mode == "decode")
{
Mat frame;
temp_count_tick = getTickCount();
cap >> frame;
temp_count_tick = getTickCount() - temp_count_tick;
if (frame.empty()) { break; }
}
else if (mode == "encode")
{
Mat element;
while(!cap.grab());
cap.retrieve(element);
temp_count_tick = getTickCount();
wrt << element;
temp_count_tick = getTickCount() - temp_count_tick;
}
tick_counts.push_back(static_cast<double>(temp_count_tick));
if (((mode == "decode") && fast_measure && (tick_counts.size() > 1e3)) ||
((mode == "encode") && (tick_counts.size() > 3e3)) ||
((mode == "encode") && fast_measure && (tick_counts.size() > 1e2)))
{ break; }
}
double time_fps = sum(tick_counts)[0] / getTickFrequency();
if (tick_counts.size() != 0)
{
cout << "Finished: " << tick_counts.size() << " in " << time_fps <<" sec ~ " ;
cout << tick_counts.size() / time_fps <<" fps " << endl;
}
else
{
cout << "Failed " << mode << ": " << file_name;
cout << " (" << pipeline << ")" << endl;
return -1;
}
return 0;
}
// Free video resource
void close()
{
cap.release();
wrt.release();
}
private:
// Choose the constructed GStreamer pipeline for decode
int createDecodePipeline()
{
if (pipeline == "default") {
cap = VideoCapture(file_name, CAP_GSTREAMER);
}
else if (pipeline.find("gst") == 0)
{
stream_pipeline << "filesrc location=\"" << file_name << "\"";
stream_pipeline << " ! " << getGstMuxPlugin();
if (pipeline.find("basic") == 4)
{
stream_pipeline << getGstDefaultCodePlugin();
}
else if (pipeline.find("vaapi1710") == 4)
{
stream_pipeline << getGstVaapiCodePlugin();
}
else if (pipeline.find("libav") == 4)
{
stream_pipeline << getGstAvCodePlugin();
}
else
{
cout << "Unsupported pipeline: " << pipeline << endl;
cmd_parser->printErrors();
return -1;
}
stream_pipeline << " ! videoconvert n-threads=" << getNumThreads();
stream_pipeline << " ! appsink sync=false";
cap = VideoCapture(stream_pipeline.str(), CAP_GSTREAMER);
}
else if (pipeline == "ffmpeg")
{
cap = VideoCapture(file_name, CAP_FFMPEG);
stream_pipeline << "default pipeline for ffmpeg" << endl;
}
else
{
cout << "Unsupported pipeline: " << pipeline << endl;
cmd_parser->printErrors();
return -1;
}
return 0;
}
// Choose the constructed GStreamer pipeline for encode
int createEncodePipeline()
{
if (checkConfiguration() < 0) return -1;
ostringstream test_pipeline;
test_pipeline << "videotestsrc pattern=smpte";
test_pipeline << " ! video/x-raw, " << getVideoSettings();
test_pipeline << " ! appsink sync=false";
cap = VideoCapture(test_pipeline.str(), CAP_GSTREAMER);
if (pipeline == "default") {
wrt = VideoWriter(file_name, CAP_GSTREAMER, getFourccCode(), fix_fps, fix_size, true);
}
else if (pipeline.find("gst") == 0)
{
stream_pipeline << "appsrc ! videoconvert n-threads=" << getNumThreads() << " ! ";
if (pipeline.find("basic") == 4)
{
stream_pipeline << getGstDefaultCodePlugin();
}
else if (pipeline.find("vaapi1710") == 4)
{
stream_pipeline << getGstVaapiCodePlugin();
}
else if (pipeline.find("libav") == 4)
{
stream_pipeline << getGstAvCodePlugin();
}
else
{
cout << "Unsupported pipeline: " << pipeline << endl;
cmd_parser->printErrors();
return -1;
}
stream_pipeline << " ! " << getGstMuxPlugin();
stream_pipeline << " ! filesink location=\"" << file_name << "\"";
wrt = VideoWriter(stream_pipeline.str(), CAP_GSTREAMER, 0, fix_fps, fix_size, true);
}
else if (pipeline == "ffmpeg")
{
wrt = VideoWriter(file_name, CAP_FFMPEG, getFourccCode(), fix_fps, fix_size, true);
stream_pipeline << "default pipeline for ffmpeg" << endl;
}
else
{
cout << "Unsupported pipeline: " << pipeline << endl;
cmd_parser->printErrors();
return -1;
}
return 0;
}
// Choose video resolution for encoding
string getVideoSettings()
{
ostringstream video_size;
if (fix_fps > 0) { video_size << "framerate=" << fix_fps << "/1, "; }
else
{
cout << "Unsupported fps (< 0): " << fix_fps << endl;
cmd_parser->printErrors();
return string();
}
if (resolution == "720p") { fix_size = Size(1280, 720); }
else if (resolution == "1080p") { fix_size = Size(1920, 1080); }
else if (resolution == "4k") { fix_size = Size(3840, 2160); }
else
{
cout << "Unsupported video resolution: " << resolution << endl;
cmd_parser->printErrors();
return string();
}
video_size << "width=" << fix_size.width << ", height=" << fix_size.height;
return video_size.str();
}
// Choose a video container
string getGstMuxPlugin()
{
ostringstream plugin;
if (container == "avi") { plugin << "avi"; }
else if (container == "mp4") { plugin << "qt"; }
else if (container == "mov") { plugin << "qt"; }
else if (container == "mkv") { plugin << "matroska"; }
else
{
cout << "Unsupported container: " << container << endl;
cmd_parser->printErrors();
return string();
}
if (mode == "decode") { plugin << "demux"; }
else if (mode == "encode") { plugin << "mux"; }
else
{
cout << "Unsupported mode: " << mode << endl;
cmd_parser->printErrors();
return string();
}
return plugin.str();
}
// Choose a libav codec
string getGstAvCodePlugin()
{
ostringstream plugin;
if (mode == "decode")
{
if (codec == "h264") { plugin << "h264parse ! "; }
else if (codec == "h265") { plugin << "h265parse ! "; }
plugin << "avdec_";
}
else if (mode == "encode") { plugin << "avenc_"; }
else
{
cout << "Unsupported mode: " << mode << endl;
cmd_parser->printErrors();
return string();
}
if (codec == "h264") { plugin << "h264"; }
else if (codec == "h265") { plugin << "h265"; }
else if (codec == "mpeg2") { plugin << "mpeg2video"; }
else if (codec == "mpeg4") { plugin << "mpeg4"; }
else if (codec == "mjpeg") { plugin << "mjpeg"; }
else if (codec == "vp8") { plugin << "vp8"; }
else
{
cout << "Unsupported libav codec: " << codec << endl;
cmd_parser->printErrors();
return string();
}
return plugin.str();
}
// Choose a vaapi codec
string getGstVaapiCodePlugin()
{
ostringstream plugin;
if (mode == "decode")
{
plugin << "vaapidecodebin";
if (container == "mkv") { plugin << " ! autovideoconvert"; }
else { plugin << " ! video/x-raw, format=YV12"; }
}
else if (mode == "encode")
{
if (codec == "h264") { plugin << "vaapih264enc"; }
else if (codec == "h265") { plugin << "vaapih265enc"; }
else if (codec == "mpeg2") { plugin << "vaapimpeg2enc"; }
else if (codec == "mjpeg") { plugin << "vaapijpegenc"; }
else if (codec == "vp8") { plugin << "vaapivp8enc"; }
else
{
cout << "Unsupported vaapi codec: " << codec << endl;
cmd_parser->printErrors();
return string();
}
}
else
{
cout << "Unsupported mode: " << resolution << endl;
cmd_parser->printErrors();
return string();
}
return plugin.str();
}
// Choose a default codec
string getGstDefaultCodePlugin()
{
ostringstream plugin;
if (mode == "decode")
{
plugin << " ! decodebin";
}
else if (mode == "encode")
{
if (codec == "h264") { plugin << "x264enc"; }
else if (codec == "h265") { plugin << "x265enc"; }
else if (codec == "mpeg2") { plugin << "mpeg2enc"; }
else if (codec == "mjpeg") { plugin << "jpegenc"; }
else if (codec == "vp8") { plugin << "vp8enc"; }
else
{
cout << "Unsupported default codec: " << codec << endl;
cmd_parser->printErrors();
return string();
}
}
else
{
cout << "Unsupported mode: " << resolution << endl;
cmd_parser->printErrors();
return string();
}
return plugin.str();
}
// Get fourcc for codec
int getFourccCode()
{
if (codec == "h264") { return VideoWriter::fourcc('H','2','6','4'); }
else if (codec == "h265") { return VideoWriter::fourcc('H','E','V','C'); }
else if (codec == "mpeg2") { return VideoWriter::fourcc('M','P','E','G'); }
else if (codec == "mpeg4") { return VideoWriter::fourcc('M','P','4','2'); }
else if (codec == "mjpeg") { return VideoWriter::fourcc('M','J','P','G'); }
else if (codec == "vp8") { return VideoWriter::fourcc('V','P','8','0'); }
else
{
cout << "Unsupported ffmpeg codec: " << codec << endl;
cmd_parser->printErrors();
return 0;
}
}
// Check bad configuration
int checkConfiguration()
{
if ((codec == "mpeg2" && getGstMuxPlugin() == "qtmux") ||
(codec == "h265" && getGstMuxPlugin() == "avimux") ||
(pipeline == "gst-libav" && (codec == "h264" || codec == "h265")) ||
(pipeline == "gst-vaapi1710" && codec=="mpeg2" && resolution=="4k") ||
(pipeline == "gst-vaapi1710" && codec=="mpeg2" && resolution=="1080p" && fix_fps > 30))
{
cout << "Unsupported configuration" << endl;
cmd_parser->printErrors();
return -1;
}
return 0;
}
bool fast_measure; // fast measure fps
string pipeline, // gstreamer pipeline type
container, // container type
mode, // coding mode
codec, // codec type
file_name, // path to videofile
resolution; // video resolution
int fix_fps; // fixed frame per second
Size fix_size; // fixed frame size
int exit_code;
VideoWriter wrt;
VideoCapture cap;
ostringstream stream_pipeline;
CommandLineParser* cmd_parser;
};
int main(int argc, char *argv[])
{
GStreamerPipeline pipe(argc, argv);
return pipe.run();
}