Hi
I am trying to use the coda encoder through Gstreamer on an iMX6-based
board.
I use the (rebased and slightly modified) gstv4l2h264enc plugin from:
https://github.com/hizukiayaka/gst-plugins-good
This pipeline works fine:
gst-launch-1.0 -vvv v4l2src device=/dev/video4 !
"video/x-raw,width=1280,height=720" ! videoconvert ! v4l2video0h264enc !
h264parse ! mp4mux ! filesink location=test.mp4
When encoder has no bitrate param set (default=0), video encoding works
well, but bitrate reaches ~2.5Mbps
When I try to set the bitrate with whatever value like 100,000 or
1,000,000, the encoder produces video with bitrate around 480kbps and a
very poor quality.
Here is the gstreamer pipeline I use with bitrate set:
gst-launch-1.0 -vvv v4l2src device=/dev/video4 !
"video/x-raw,width=1280,height=720" ! videoconvert ! v4l2video0h264enc
extra-controls="controls,video_bitrate=1000000;" ! h264parse ! mp4mux !
filesink location=test.mp4
The video_bitrate control seems to be correctly passed to the driver by
GStreamer since I can see the VIDIOC_S_CTRL call.
Any idea ?
Thanks
Fred
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