基于VP9 + RTSP的FFMPEG
基于VP9 + RTSP的FFMPEG
提问于 2020-09-16 09:42:13
当我们使用HEVC + RTSP时，ffmpeg工作得很好。流被摄像头捕获。
ffmpeg -f dshow -rtbufsize 100M -f vfwcap -i "0" -strict experimental -c:v hevc_qsv -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/test输出如下：
frame= 355 fps= 37 q=-0.0 size=N/A time=00:00:11.27 bitrate=N/A dup=159 drop=0 speed=1.18x然后切换到VP9 + RTSP。
ffmpeg -f dshow -rtbufsize 100M -f vfwcap -i "0" -strict experimental -c:v libvpx-vp9 -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/testfps和速度看上去太慢了：
frame= 263 fps=9.5 q=0.0 size=N/A time=00:00:07.94 bitrate=N/A dup=119 drop=0 speed=0.288x然后我们用“跳”来播放这条小溪。有很多错误信息，视频似乎冻结了。
[vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available
[vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available0B f=0/0
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available
[vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available最后，我们尝试了硬件VP9编码器。
ffmpeg -f dshow -rtbufsize 100M -f vfwcap -i "0" -strict experimental -c:v vp9_qsv -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/test它不能工作。
[swscaler @ 0000021e88df9fc0] deprecated pixel format used, make sure you did set range correctly
[vp9_qsv @ 0000021e8687df80] Selected ratecontrol mode is unsupported
[vp9_qsv @ 0000021e8687df80] Low power mode is unsupported
[vp9_qsv @ 0000021e8687df80] Current frame rate is unsupported
[vp9_qsv @ 0000021e8687df80] Current picture structure is unsupported
[vp9_qsv @ 0000021e8687df80] Current resolution is unsupported
[vp9_qsv @ 0000021e8687df80] Current pixel format is unsupported
[vp9_qsv @ 0000021e8687df80] some encoding parameters are not supported by the QSV runtime. Please double check the input parameters.
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!那么，如何成功地处理VP9 + RTSP呢？
回答 1
Stack Overflow用户
回答已采纳
发布于 2021-01-04 12:03:17
我绝不是这方面的权威，但我的处境和你的相似。如果我理解此GitHub问题正确，"gen 9“Intel GPU -- "Kaby”、“Coffee”、“Whiskey Lake”、“Comet”每维基百科，我认为它对应于7xxx到10 7xxx-具有对VP9编码的硬件支持，但是Windows驱动程序并没有为Media公开这个特性以利用它的优势。我认为我们看到的错误消息反映了这样一个事实:在我们的特定CPU模型上，在我们的操作系统上，QSV编码是不可用的。
由于某种原因，这个特性在Linux上是可用的。我已经看到几个消息来源说，VA (vp9_vaapi)应该可以在任何这些"gen 9“处理器上工作；QSV驱动程序(vp9_qsv)也有可能在Linux上工作。我还没机会试一试。
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