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【代码】Gstreamer与ffmpeg之mp4转h264对比(三十)

【代码】Gstreamer之mp4mux:Buffer has no PTS解决(二十九)

原因：一般情况下，通过apt install gstreamer时，默认安装目录为/usr/local/lib/gstreamer-1.0目录.但是其实不是，所以要指定下gstreamer插件路径:# export GST_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/gstreamer-1.0

1.gst-omx/omx/gstomxvideoenc.c//定义一:static gboolean gst_omx_video_enc_set_format (GstVideoEncoder * encoder,GstVideoCodecState * state);<1>.static void gst_omx_video_enc_class_init (GstOMXVideoEncClass * klass){ GObjectClass *gobject_class = G.

1.gstreamer1.18.4和ffmpeg4.3.2下载https://gstreamer.freedesktop.org/src2.gstreamer1.18.4编译顺序gstreamer-1.18.4gst-plugins-base-1.18.4gst-plugins-good-1.18.4gst-plugins-bad-1.18.4gst-plugins-ugly-1.18.4gst-rtsp-server-1.18.4//通用编译+安装命令# meson buil...

一、栗子#include <gst/gst.h>int main (int argc, char *argv[]){ GstElement *pipeline; GstBus *bus; GstMessage *msg; /* Initialize GStreamer */ gst_init (&argc, &argv); /* Build the pipeline */ pipeline = gst_parse_launch ("pla

1.dump I帧gst-omx/omx/gstomxh265enc.c2.dump完整h265/h264帧gst-omx/omx/gstomxvideoenc.cstatic GstFlowReturn gst_omx_video_enc_handle_output_frame ( GstOMXVideoEnc * self, GstOMXPort * port, GstOMXBuffer * buf, GstVideoCodecFrame * frame){ if .

1.从pulsesrc转码vorbisenc编码(Ogg封装格式)# gst-launch-1.0 pulsesrc ! audioconvert ! vorbisenc ! oggmux ! filesink location=dump.ogg2.从pulsesrc转码lamemp3enc编码(libav MP3封装格式(MPEG audio layer 3))# gst-launch-1.0 pulsesrc ! audioconvert ! lamemp3enc ! avmux_mp3 ! .

注意：Gsteamer版本为1.16.20.下载arm交叉编译环境(自行配置)1.下载x265 code# git clone https://github.com/videolan/x265.git 2.编译x265源码# cd x265-master/build/arm-linux<1>.修改emacs crosscompile.cmake# modified begin# specify the cross compilerset(CMAKE_C_COMPILER .

1.gstreamer/tools/gst-launch.cGstElement * pipelinegst_element_set_state (pipeline, GST_STATE_PLAYING);2.gstreamer/gst/gstelement.c<1>.static void gst_element_class_init (GstElementClass * klass){ klass->set_state = GST_DEBUG_FUNCPTR (gs.

一.重置PTS和DTS是在每次封装mp4时初始化里调用的reset.1.isomp4-plugin.c<1>.GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, isomp4, "ISO base media file format support (mp4, 3gpp, qt, mj2)", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST.

1.在Gstreamer下通过pipeline中传递的是GstBuffer,GstBuffer里可以在每帧中设置PTS,也可以获取出每帧的DTS.gst-plugins-good/gst/isomp4/gstqtmux.c<1>.static GstFlowReturn gst_qt_mux_add_buffer (GstQTMux * qtmux, GstQTPad * pad, GstBuffer * buf){ GstBuffer *last_buf = NULL; l.

1.GstBuffer结构体定义 gstreamer/gstreamer/gst/gstbuffer.htypedef struct _GstBuffer GstBuffer;/** * GstBuffer: * @mini_object: the parent structure * @pool: pointer to the pool owner of the buffer * @pts: presentation timestamp of the buffer, can be ..

一.首先看gst_buffer_map()定义/** * gst_buffer_map: * @buffer: a #GstBuffer. * @info: (out): info about the mapping * @flags: flags for the mapping * * This function fills @info with the #GstMapInfo of all merged memory * blocks in @buffer. * * @flags .

1.Androideglglessink视频sink是基于OpenGLES和EGLopenslessink音频sink基于OpenSL ESandroidmediaandroid.media.MediaCodec支持在设备侧编解码包括硬件编解码，Android4.1以后支持。2.Linuxximagesink标准基于X11视频sink，支持缩放需借助videoscale element。xvimagesink基于X11系统的视频sink，支持在GPU上进行高.

鉴于Gstreamer官网访问比较缓慢，构建一个本地离线官方文档，方便学习查阅。1.配置编译环境# sudo apt instll python3-dev libxml2-dev libxslt1-dev cmake libyaml-dev libclang-dev llvm-dev libglib2.0-dev libjson-glib-dev flex# pip3 install hotdoc2.下载Gstreamer Doc# git clone https://github.co.

***************************************************************************************0.测试demo# gst-launch-1.0 videotestsrc pattern=snow ! videoconvert ! autovideosink//Or//通过glib2的g_object_set设置属性g_object_set(G_OBJECT(data_->videoparse), "patte.

一、pulseaudio音乐播放流程***************************************************************************************open("test.wav", O_RDONLY));pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error));pa_simple_write(s.

1.注册信号：g_signal_new()guint g_signal_new (const gchar *signal_name, GType itype, GSignalFlags signal_flags, guint class_offset, GSignalAccumulator accumulator, gpointer accu_data, GSignalC

# sudo aptitude install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev

1.计数实现方式//test02.c#include <stdio.h>#include <stdlib.h>#include <stdarg.h>void test(int count, ...){ va_list args; char *buf; va_start(args, count); while(count--){ buf = va_arg(args, char *); printf("buf = %s\n.

基于Gstreamer1.x搭建Rtsp Server, gst-rtsp-server不是以plugin的形式存在,需要下载源码编译。0.安装依赖包# sudo apt-get install gtk-doc-tools libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav g.

解决方案：将ffmpegcolorspace替换为：videoconvert注意：videoconvert：用于颜色转换的插件 转换多种颜色格式的过滤器，摄像头设备视频数据通常使用YUV颜色格式，而显示器通常使用RGB颜色格式。...

1.操作v4l2src源camera预览//查询/dev/video0分辨率# v4l2-ctl -d /dev/video0 --all //预览摄像头# gst-launch-1.0 v4l2src ! video/x-raw,format=YUY2,width=640,height=480 ! videoconvert ! xvimagesink# gst-launch-1.0 v4l2src ! video/x-raw,format=YUY2,width=640,height=480 .

# apt-get install libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.

1.Gstreamer Log等级GST_DEBUG="*:1" //ERRORGST_DEBUG="*:2" //WARNGST_DEBUG="*:3" //INFOGST_DEBUG="*:4" //DEBUGGST_DEBUG="*:5" //LOG//可以添加查看某个文件的log# GST_DEBUG="gstregistry:,3" gst-launch-0.10 playbin2 uri=file:///data/developer/guomei.mp4# GST_DEBUG.

1、GStreamer是什么？众所周知，Microsoft's Windows和Apple's MacOS对多媒体设备、多媒体创作、播放和实时处理等方面都有很好的支持，而Linux对多媒体应用一直略显不足，所以为了解决Linux上对多媒体方面的支持，才引进GStreamer。GStreamer是一个通用的跨平台的流媒体应用程序框架，基于GObject，以C语言写成。 GStreamer并不受限于音频和视频处理，它能够处理任意类型的数据流，因此任意一种流媒体应用都可以支持，如：MeidaPlayer、

1.audio裸流：GST_STATIC_CAPS( "audio/x-raw, " "format = (string)S16LE, " "rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, " "channels = (int){1,2};")2.audio-mp3：GST_STATIC_CAPS( "audio/mpeg, " "mpegver.

2.1.1. OverviewGStreamer是一个多媒体框架，它可以允许你轻易地创建、编辑与播放多媒体文件，这是 通过创建带有很多特殊的多媒体元素的管道来完成的。2.1.2. 管道-pipelineGStreamer的工作方式非常简单，你只需创建一个包含很多元素的管道，这与Linux命令行 的管道非常类似，例如，一般命令行的管道是这样的:foo@bar:~$ ps ax | grep "apache" |wc -l这个命令首先捕获一个进程列表然后返回名字包含 “apache” 的

# sudo apt-get install libgstreamer*2.demo.c#include <gst/gst.h>int main(int argc, char *argv[]) { GstElement *pipeline; GstBus *bus; GstMessage *msg; /* Initialize GStreamer */ gst_init (&argc, &argv); /* Build the pipeli.