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Tuning mediaplayer pipeiine (buffering and color conversion( and add

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brunoherbelin
2020-07-29 00:10:36 +02:00
parent 2eb59f2ffe
commit 714f2bea3c
1 changed files with 18 additions and 14 deletions
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32
MediaPlayer.cpp
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@@ -129,10 +129,18 @@ void MediaPlayer::execute_open()
// equivalent to gst-launch-1.0 uridecodebin uri=file:///path_to_file/filename.mp4 ! videoconvert ! ximagesink
// build string describing pipeline
string description = "uridecodebin uri=" + uri_ + " name=decoder !";
// NB: video convertion chroma-resampler
// Duplicates the samples when upsampling and drops when downsampling 0
// Uses linear interpolation 1 (default)
// Uses cubic interpolation 2
// Uses sinc interpolation 3
// Enable buffering on the parsed/demuxed data with the use-buffering property:
// This is interesting to enable buffering on slower random access media such as a network file server.
// buffer-duration in ns (500000 = 0.5s)
string description = "uridecodebin uri=" + uri_ + " use-buffering=true buffer-duration=500000 ! ";
if (interlaced_)
description += " deinterlace !";
description += " videoconvert ! appsink name=sink";
description += "deinterlace ! ";
description += "videoconvert chroma-resampler=2 ! appsink name=sink";
// parse pipeline descriptor
GError *error = NULL;
@@ -1015,19 +1023,15 @@ void MediaPlayer::callback_discoverer_process (GstDiscoverer *discoverer, GstDis
// try to fill-in the codec information
GstCaps *caps = gst_discoverer_stream_info_get_caps (tmpinf);
if (caps) {
m->codec_name_ = std::string( gst_pb_utils_get_codec_description(caps) );
m->codec_name_ = std::string( gst_pb_utils_get_codec_description(caps) ) + " ";
gst_caps_unref (caps);
}
// const GstTagList *tags = gst_discoverer_stream_info_get_tags(tmpinf);
// if ( tags ) {
// gchar *container = NULL;
// gst_tag_list_get_string(tags, GST_TAG_CONTAINER_FORMAT, &container);
// if (container) m->codec_name = std::string(container) + " ";
// gchar *codec = NULL;
// gst_tag_list_get_string(tags, GST_TAG_VIDEO_CODEC, &codec);
// if (!codec) gst_tag_list_get_string (tags, GST_TAG_CODEC, &codec);
// if (codec) m->codec_name += std::string(codec);
// }
const GstTagList *tags = gst_discoverer_stream_info_get_tags(tmpinf);
if ( tags ) {
gchar *container = NULL;
gst_tag_list_get_string (tags, GST_TAG_CONTAINER_FORMAT, &container);
if (container) m->codec_name_ += std::string(container);
}
// exit loop
foundvideostream = true;
}