x264 [错误]：基线配置文件不支持 4:2:2
x264 [error]: baseline profile doesn't support 4:2:2
我可以使用以下方法播放来自我的 UVC 相机的视频流：
gst-launch-1.0 v4l2src device=/dev/video4 ! decodebin ! autovideosink
现在，我想将流转换为 h264，以便进一步传输（即不一定到 autovideosink）。但是当我执行以下操作时：
gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! x264enc ! decodebin ! autovideosink
我收到错误：
x264 [error]: baseline profile doesn't support 4:2:2
我错过了什么？
您可以通过在 videoconvert 和 x264enc 之间设置上限来强制使用 4:2:0，如下所示：
gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! videoconvert ! video/x-raw,format=I420 ! x264enc ! decodebin ! autovideosink
注意：“4:2:2”指定“chroma subsampling", and there are nice comparisons here.
定义：
Chroma subsampling is a type of compression that reduces the color information in a signal in favor of luminance data. This reduces bandwidth without significantly affecting picture quality.
我可以使用以下方法播放来自我的 UVC 相机的视频流：
gst-launch-1.0 v4l2src device=/dev/video4 ! decodebin ! autovideosink
现在，我想将流转换为 h264，以便进一步传输（即不一定到 autovideosink）。但是当我执行以下操作时：
gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! x264enc ! decodebin ! autovideosink
我收到错误：
x264 [error]: baseline profile doesn't support 4:2:2
我错过了什么？
您可以通过在 videoconvert 和 x264enc 之间设置上限来强制使用 4:2:0，如下所示：
gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! videoconvert ! video/x-raw,format=I420 ! x264enc ! decodebin ! autovideosink
注意：“4:2:2”指定“chroma subsampling", and there are nice comparisons here.
定义：
Chroma subsampling is a type of compression that reduces the color information in a signal in favor of luminance data. This reduces bandwidth without significantly affecting picture quality.