gstreamer 管道产生慢动作（低 FPS）视频

Question

我想连接到 HTTP MJPEG 实时流并将其作为视频文件在本地转储。所以我做了：

$ gst-launch -vvv souphttpsrc location=http://bikersschool.dyndns.org/video.cgi?resolution=vga is-live=true do-timestamp=true ！多部分解复用！ JPEG格式！视频速率！视频/x-raw-yuv，帧率=60/1！理论！奥格多克斯！文件接收器位置="hi.ogg"

但是，在播放 hi.ogg 时，视频是慢动作的。

这是它产生的a sample video：

更新：

我尝试降低 videorate 和 caps 过滤器。但它失败并显示以下消息：

$ gst-launch -vvv souphttpsrc location=http://bikersschool.dyndns.org/video.cgi?resolution=vga is-live=true do-timestamp=true ！多部分解复用！ JPEG格式！理论！奥格多克斯！文件接收器位置="hi.ogg"

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:sink: caps = image/jpeg
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1
ERROR: from element /GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0: Internal data flow error.
Additional debug info:
..\..\..\Source\gstreamer\libs\gst\base\gstbasesrc.c(2507): gst_base_src_loop (): /GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 1547045000 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:sink: caps = NULL
/GstPipeline:pipeline0/GstMultipartDemux:multipartdemux0.GstPad:src_0: caps = NULL
Setting pipeline to NULL ...
Freeing pipeline ...

Answer 1

videorate 的目的是什么！视频/x-raw-yuv，帧率=60/1？

从技术上讲，videorate 会复制丢帧以使输出速率达到 60fps。如果你降低视频速率怎么办！大写过滤器？ jpegdec 的大写字母 gst-launch 打印什么？