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Video recorder parameters and process figured out.

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brunoherbelin
2020-07-26 19:33:39 +02:00
parent 9fdc9e6c1a
commit ab7ce4aa40
1 changed files with 64 additions and 49 deletions
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113
Recorder.cpp
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@@ -115,26 +115,43 @@ void H264Recorder::addFrame (FrameBuffer *frame_buffer, float dt)
// create a gstreamer pipeline
// Control x264 encoder quality :
// pass=5
// pass=4
// quant (4) – Constant Quantizer
// qual (5) – Constant Quality
// quantizer=25
// quantizer=23
// The total range is from 0 to 51, where 0 is lossless, 18 can be considered ‘visually lossless’,
// and 51 is terrible quality. A sane range is 18-26, and the default is 23.
// speed-preset
// speed-preset=3
// veryfast (3)
// faster (4)
// fast (5)
// string description = "appsrc name=src ! videoconvert ! x264enc pass=5 quantizer=25 speed-preset=6 ! video/x-h264, profile=high ! qtmux ! filesink name=sink";
string description = "appsrc name=src ! videoconvert ! "
"x264enc pass=4 quantizer=23 speed-preset=3 ! video/x-h264, profile=high ! h264parse ! "
"qtmux ! filesink name=sink";
string description = "appsrc name=src ! videoconvert ! vp9enc cq-level=35 threads=4 cpu-used=4 end-usage=cq ! video/x-vp9 ! qtmux ! filesink name=sink";
// WebM VP9 encoding parameters
// https://www.webmproject.org/docs/encoder-parameters/
// https://developers.google.com/media/vp9/settings/vod/
// string description = "appsrc name=src ! videoconvert ! "
// "vp9enc end-usage=vbr end-usage=vbr cpu-used=3 max-quantizer=35 target-bitrate=200000 keyframe-max-dist=360 token-partitions=2 static-threshold=1000 ! "
// "webmmux ! filesink name=sink";
// string description = "appsrc name=src ! videoconvert ! avenc_prores ! qtmux ! filesink name=sink";
// string description = "appsrc name=src ! videoconvert ! x265enc tune=4 speed-preset=4 ! video/x-h265, profile=main ! matroskamux ! filesink name=sink";
// x265 encoder quality
// string description = "appsrc name=src ! videoconvert ! "
// "x265enc tune=4 speed-preset=2 option-string='crf=28' ! h265parse ! "
// "qtmux ! filesink name=sink";
// Apple ProRes encoding parameters
// pass=2
// cbr (0) – Constant Bitrate Encoding
// quant (2) – Constant Quantizer
// pass1 (512) – VBR Encoding - Pass 1
// string description = "appsrc name=src ! videoconvert ! "
// "avenc_prores bitrate=60000 pass=2 ! "
// "qtmux ! filesink name=sink";
// parse pipeline descriptor
GError *error = NULL;
@@ -169,18 +186,18 @@ void H264Recorder::addFrame (FrameBuffer *frame_buffer, float dt)
"is-live", TRUE,
"format", GST_FORMAT_TIME,
// "do-timestamp", TRUE,
// "size", 120,
NULL);
// 2 sec buffer
gst_app_src_set_max_bytes( src_, 60 * buf_size_);
gst_app_src_set_max_bytes( src_, 0 );
// gst_app_src_set_max_bytes( src_, 2 * buf_size_);
// instruct src to use the required caps
GstCaps *caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, "RGB",
"width", G_TYPE_INT, width_,
"height", G_TYPE_INT, height_,
// "framerate", GST_TYPE_FRACTION, 30, 1,
"framerate", GST_TYPE_FRACTION, 30, 1,
NULL);
gst_app_src_set_caps (src_, caps);
gst_caps_unref (caps);
@@ -221,20 +238,23 @@ void H264Recorder::addFrame (FrameBuffer *frame_buffer, float dt)
frame_buffer->height() != height_ ||
frame_buffer->use_alpha() != frame_buffer_->use_alpha()) {
enabled_ = false;
// end stream and stop
gst_app_src_end_of_stream (src_);
recording_ = false;
}
}
static int count = 0;
// store a frame if enabled
if (enabled_ && buf_size_ > 0)
// store a frame if recording is active
if (recording_ && buf_size_ > 0)
{
// calculate dt in ns
time_ += gst_gdouble_to_guint64( dt * 1000000.f);
// if time is passed one frame duration (with 10% margin)
if ( time_ > frame_duration_ - 3000000 ) {
// and if the encoder accepts data
if ( time_ > frame_duration_ - 3000000 && accept_buffer_) {
GstBuffer *buffer = gst_buffer_new_and_alloc (buf_size_);
GLenum format = frame_buffer_->use_alpha() ? GL_RGBA : GL_RGB;
@@ -249,32 +269,19 @@ void H264Recorder::addFrame (FrameBuffer *frame_buffer, float dt)
glGetTextureSubImage( frame_buffer_->texture(), 0, 0, 0, 0, width_, height_, 1, format, GL_UNSIGNED_BYTE, buf_size_, map.data);
gst_buffer_unmap (buffer, &map);
// push
// Log::Info("H264Recorder push data %ld", buffer->pts);
gst_app_src_push_buffer (src_, buffer);
// NB: buffer will be unrefed by the appsrc
// push the buffer if the appsrc accepts
if (accept_buffer_)
// TODO : detect user request for end
count++;
if (count > 120)
{
Log::Info("H264Recorder push data %ld", buffer->pts);
// push
gst_app_src_push_buffer (src_, buffer);
// NB: buffer will be unrefed by the appsrc
// Log::Info("H264Recorder push EOS");
gst_app_src_end_of_stream (src_);
// TODO : detect user request for end
count++;
if (count > 120)
{
Log::Info("H264Recorder push EOS");
gst_app_src_end_of_stream (src_);
recording_ = false;
}
}
// the appsrc refuses to take anymore buffer
else {
// drop frame
gst_buffer_unref (buffer);
// TODO: if encoding is too busy, maybe we should stack the frame instead of skipping it
recording_ = false;
}
// restart counter
@@ -285,27 +292,35 @@ void H264Recorder::addFrame (FrameBuffer *frame_buffer, float dt)
}
}
// did the recording terminate with sink receiving end-of-stream ?
if ( !recording_ && sink_->eos)
else
{
// stop the pipeline
GstStateChangeReturn ret = gst_element_set_state (pipeline_, GST_STATE_NULL);
if (ret == GST_STATE_CHANGE_FAILURE)
Log::Warning("H264Recorder Could not stop");
else
Log::Notify("H264Recording finished");
// Wait for EOS message
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline_));
GstMessage *msg = gst_bus_poll(bus, GST_MESSAGE_EOS, GST_TIME_AS_USECONDS(1));
count = 0;
finished_ = true;
if (msg) {
// Log::Info("received EOS");
// stop the pipeline
GstStateChangeReturn ret = gst_element_set_state (pipeline_, GST_STATE_NULL);
if (ret == GST_STATE_CHANGE_FAILURE)
Log::Warning("H264Recorder Could not stop");
else
Log::Notify("H264Recording finished");
count = 0;
finished_ = true;
}
}
}
// appsrc needs data and we should start sending
void H264Recorder::callback_need_data (GstAppSrc *src, guint length, gpointer p)
{
Log::Info("H264Recording callback_need_data");
// Log::Info("H264Recording callback_need_data");
H264Recorder *rec = (H264Recorder *)p;
if (rec) {
rec->accept_buffer_ = rec->recording_ ? true : false;
@@ -316,7 +331,7 @@ void H264Recorder::callback_need_data (GstAppSrc *src, guint length, gpointer p)
// appsrc has enough data and we can stop sending
void H264Recorder::callback_enough_data (GstAppSrc *src, gpointer p)
{
Log::Info("H264Recording callback_enough_data");
// Log::Info("H264Recording callback_enough_data");
H264Recorder *rec = (H264Recorder *)p;
if (rec) {
rec->accept_buffer_ = false;