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我正在尝试使用 rtspsrc 元素属性名称链接音频和视频队列。管道是：

gst-launch-1.0 rtspsrc location="rtsp://" 延迟=0 name=demux demux。！队列 ！rtpmp4gdepay ！不一样！avdec_aac！音频转换！音频重采样！自动音频接收器解复用器。！队列 ！rtph264depay！h264解析！omxh264dec ！视频转换！视频缩放！视频/x-raw，宽度=176，高度=144！ximagesink

我可以使用创建名称元素的值

g_object_set（源，“名称”，“解复用”，NULL）；

但我无法链接音频和视频队列，因此无法创建。以下是部分代码：

audio = gst_bin_new ("audiobin");
audioQueue = gst_element_factory_make ("queue", "audio-queue");
audioDepay = gst_element_factory_make ("rtpmp4gdepay", "audio-depayer");
audioParse = gst_element_factory_make ("aacparse", "audio-parser");
audioDecode = gst_element_factory_make ("avdec_aac", "audio-decoder");
audioConvert = gst_element_factory_make ("audioconvert", "aconv");
audioResample = gst_element_factory_make ("audioresample", "audio-resample");
audioSink = gst_element_factory_make ("autoaudiosink", "audiosink");

视频箱

video  = gst_bin_new ("videobin");
videoQueue = gst_element_factory_make ("queue", "video-queue");
videoDepay= gst_element_factory_make ("rtph264depay", "video-depayer");
videoParser = gst_element_factory_make ("h264parse", "video-parser");
videoDecode = gst_element_factory_make ("omxh264dec", "video-decoder");
videoConvert = gst_element_factory_make("videoconvert", "convert");
videoScale = gst_element_factory_make("videoscale", "video-scale");
videoSink = gst_element_factory_make("ximagesink", "video-sink");
capsFilter = gst_caps_new_simple("video/x-raw",
                    "width", G_TYPE_INT, 176,
                    "height", G_TYPE_INT, 144,
                    NULL);

链接程序

 /*Linking filter element to videoScale and videoSink */
    link_ok = gst_element_link_filtered(videoScale,videoSink, capsFilter);
    gst_caps_unref (capsFilter);
    if (!link_ok) {
            g_warning ("Failed to link element1 and element2!");
    }
    /* Linking video elements internally */
    if (!gst_element_link_many(videoQueue, videoDepay, videoParser, videoDecode, videoConvert, NULL))
    {
            g_printerr("Cannot link videoDepay and videoParser \n");
            return 0;
    }
    if (!gst_element_link_many(audioQueue, audioDepay, audioParse, audioDecode, audioConvert, audioResample, audioSink, NULL))
    {
            g_printerr("Cannot link audioDepay and audioParse \n");
            return 0;
    }

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4

1 回答 1

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videoConvert 和 videoScale 没有链接在一起，你应该链接它们。

我会创建一个 capfilter 元素

videoCaps = gst_element_factory_make("capsfilter",NULL);

添加了过滤器：

g_object_set (videoCaps , "caps", capsFilter, NULL);

而不是调用 gst_element_link_filtered 我会将其添加到 gst_element_link_many：

gst_element_link_many(videoQueue, videoDepay, videoParser, videoDecode, videoConvert,videoScale, videoCaps, videoSink, NULL));

于 2017-05-16T13:44:36.553 回答