Revert: encoding video on separate thread
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ce5e0169c4
commit
ce9465b391
107
src/main.cpp
107
src/main.cpp
@ -1868,68 +1868,8 @@ int main(int argc, char **argv) {
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bool should_stop_error = false;
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AVFrame *aframe = av_frame_alloc();
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// Separate video encoding from frame capture because on amd/intel the frame capture can be very very slow
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// if we are hitting the graphical processing limit, in which case all applications will run at the same framerate
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// as the game framerate. This performance seems to be artificially limited.
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// This garbage is needed because we want to produce constant frame rate videos instead of variable frame rate
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// videos because bad software such as video editing software and VLC do not support variable frame rate software,
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// despite nvidia shadowplay and xbox game bar producing variable frame rate videos.
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// So we have to encode a frame multiple times (duplicate) if we dont produce exactly 1000/fps frames a second.
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AVFrame *latest_video_frame = nullptr;
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std::condition_variable video_frame_cv;
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std::mutex video_frame_mutex;
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std::thread video_send_encode_thread([&]() {
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int64_t video_pts_counter = 0;
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int64_t video_prev_pts = 0;
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AVFrame *video_frame = nullptr;
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while(running) {
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{
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std::unique_lock<std::mutex> lock(video_frame_mutex);
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video_frame_cv.wait(lock, [&]{ return latest_video_frame || !running; });
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if(!running)
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break;
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if(!latest_video_frame)
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continue;
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video_frame = latest_video_frame;
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latest_video_frame = nullptr;
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}
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const double this_video_frame_time = clock_get_monotonic_seconds();
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const int64_t expected_frames = std::round((this_video_frame_time - start_time_pts) / target_fps);
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const int num_frames = framerate_mode == FramerateMode::CONSTANT ? std::max(0L, expected_frames - video_pts_counter) : 1;
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// TODO: Check if duplicate frame can be saved just by writing it with a different pts instead of sending it again
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for(int i = 0; i < num_frames; ++i) {
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if(framerate_mode == FramerateMode::CONSTANT) {
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video_frame->pts = video_pts_counter + i;
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} else {
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video_frame->pts = (this_video_frame_time - record_start_time) * (double)AV_TIME_BASE;
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const bool same_pts = video_frame->pts == video_prev_pts;
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video_prev_pts = video_frame->pts;
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if(same_pts)
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continue;
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}
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int ret = avcodec_send_frame(video_codec_context, video_frame);
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if(ret == 0) {
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// TODO: Move to separate thread because this could write to network (for example when livestreaming)
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receive_frames(video_codec_context, VIDEO_STREAM_INDEX, video_stream, video_frame->pts, av_format_context,
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record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex);
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} else {
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fprintf(stderr, "Error: avcodec_send_frame failed, error: %s\n", av_error_to_string(ret));
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}
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}
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video_pts_counter += num_frames;
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av_frame_free(&video_frame);
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video_frame = nullptr;
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}
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});
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int64_t video_pts_counter = 0;
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int64_t video_prev_pts = 0;
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int64_t audio_prev_pts = 0;
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while(running) {
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@ -1993,13 +1933,33 @@ int main(int argc, char **argv) {
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frame_timer_start = time_now - frame_time_overflow;
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gsr_capture_capture(capture, frame);
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std::lock_guard<std::mutex> lock(video_frame_mutex);
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if(latest_video_frame) {
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av_frame_free(&latest_video_frame);
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latest_video_frame = nullptr;
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const double this_video_frame_time = clock_get_monotonic_seconds();
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const int64_t expected_frames = std::round((this_video_frame_time - start_time_pts) / target_fps);
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const int num_frames = framerate_mode == FramerateMode::CONSTANT ? std::max(0L, expected_frames - video_pts_counter) : 1;
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// TODO: Check if duplicate frame can be saved just by writing it with a different pts instead of sending it again
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for(int i = 0; i < num_frames; ++i) {
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if(framerate_mode == FramerateMode::CONSTANT) {
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frame->pts = video_pts_counter + i;
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} else {
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frame->pts = (this_video_frame_time - record_start_time) * (double)AV_TIME_BASE;
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const bool same_pts = frame->pts == video_prev_pts;
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video_prev_pts = frame->pts;
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if(same_pts)
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continue;
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}
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int ret = avcodec_send_frame(video_codec_context, frame);
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if(ret == 0) {
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// TODO: Move to separate thread because this could write to network (for example when livestreaming)
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receive_frames(video_codec_context, VIDEO_STREAM_INDEX, video_stream, frame->pts, av_format_context,
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record_start_time, frame_data_queue, replay_buffer_size_secs, frames_erased, write_output_mutex);
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} else {
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fprintf(stderr, "Error: avcodec_send_frame failed, error: %s\n", av_error_to_string(ret));
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}
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}
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latest_video_frame = av_frame_clone(frame);
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video_frame_cv.notify_one();
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video_pts_counter += num_frames;
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}
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if(save_replay_thread.valid() && save_replay_thread.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
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@ -2043,19 +2003,8 @@ int main(int argc, char **argv) {
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}
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}
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{
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std::lock_guard<std::mutex> lock(video_frame_mutex);
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video_frame_cv.notify_one();
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}
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video_send_encode_thread.join();
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av_frame_free(&aframe);
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if(latest_video_frame) {
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av_frame_free(&latest_video_frame);
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latest_video_frame = nullptr;
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}
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if (replay_buffer_size_secs == -1 && av_write_trailer(av_format_context) != 0) {
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fprintf(stderr, "Failed to write trailer\n");
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}
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