网络推广怎么免费做,网站内部优化的方法,网站建设需求分析文档,wordpress 获取用户名文章目录 前言一、怎样使用 gstreamer 生成 pattern 数据1. 将 videotestsrc 生成的 pattern 数据送显2. 将 videotestsrc 生成的 pattern 数据保存为图片(文件)二、gstreamer 如何对图片进行格式转换三、gstreamer 如何对图片进行缩放四、gstreamer 如何对图片进行裁剪总结前言… 文章目录 前言一、怎样使用 gstreamer 生成 pattern 数据1. 将 videotestsrc 生成的 pattern 数据送显2. 将 videotestsrc 生成的 pattern 数据保存为图片(文件) 二、gstreamer 如何对图片进行格式转换三、gstreamer 如何对图片进行缩放四、gstreamer 如何对图片进行裁剪总结 前言
本文主要介绍如何使用 gstreamer 对图片进行格式转换，以及获取 pattern 图片相关的命令 软硬件环境： 硬件：PC 软件：ubuntu22.04 gstreamer 1.20.3 一、怎样使用 gstreamer 生成 pattern 数据
gstreamer 是通过 videotestsrc 这个插件来产生 pattern 数据的，产生的 pattern 数据送到下一级处理，可以是送显，也可以保存为本地文件。 在 ubuntu 下执行 gst-inspect-1.0 videotestsrc 命令可以查看 videotestsrc 这个插件的相关属性及参数，打印如下所示
lkh@ubuntu:~/lkh2024/opengles_test$ gst-inspect-1.0 videotestsrc
Factory Details:Rank none (0)Long-name Video test sourceKlass Source/VideoDescription Creates a test video streamAuthor David A. Schleef ds@schleef.orgPlugin Details:Name videotestsrcDescription Creates a test video streamFilename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvideotestsrc.soVersion 1.20.1License LGPLSource module gst-plugins-baseSource release date 2022-03-14Binary package GStreamer Base Plugins (Ubuntu)Origin URL https://launchpad.net/distros/ubuntu/+source/gst-plugins-base1.0GObject+----GInitiallyUnowned+----GstObject+----GstElement+----GstBaseSrc+----GstPushSrc+----GstVideoTestSrcPad Templates:SRC template: 'src'Availability: AlwaysCapabilities:video/x-rawformat: { (string)ABGR64_LE, (string)BGRA64_LE, (string)AYUV64, (string)ARGB64_LE, (string)ARGB64, (string)RGBA64_LE, (string)ABGR64_BE, (string)BGRA64_BE, (string)ARGB64_BE, (string)RGBA64_BE, (string)GBRA_12LE, (string)GBRA_12BE, (string)Y412_LE, (string)Y412_BE, (string)A444_10LE, (string)GBRA_10LE, (string)A444_10BE, (string)GBRA_10BE, (string)A422_10LE, (string)A422_10BE, (string)A420_10LE, (string)A420_10BE, (string)RGB10A2_LE, (string)BGR10A2_LE, (string)Y410, (string)GBRA, (string)ABGR, (string)VUYA, (string)BGRA, (string)AYUV, (string)ARGB, (string)RGBA, (string)A420, (string)AV12, (string)Y444_16LE, (string)Y444_16BE, (string)v216, (string)P016_LE, (string)P016_BE, (string)Y444_12LE, (string)GBR_12LE, (string)Y444_12BE, (string)GBR_12BE, (string)I422_12LE, (string)I422_12BE, (string)Y212_LE, (string)Y212_BE, (string)I420_12LE, (string)I420_12BE, (string)P012_LE, (string)P012_BE, (string)Y444_10LE, (string)GBR_10LE, (string)Y444_10BE, (string)GBR_10BE, (string)r210, (string)I422_10LE, (string)I422_10BE, (string)NV16_10LE32, (string)Y210, (string)v210, (string)UYVP, (string)I420_10LE, (string)I420_10BE, (string)P010_10LE, (string)NV12_10LE32, (string)NV12_10LE40, (string)P010_10BE, (string)Y444, (string)RGBP, (string)GBR, (string)BGRP, (string)NV24,
