hardware encoding of MJPEG is impacted by H264 decoding

Hardware encoding of MJPEG is impacted by h264 decoding , but softeware encoding of MJPEG isn’t impacted.

Here is my environment setup.

send h264 stream(PC) --> h264 decoding and MJPEG encoding(TK1)–> MJPEG decoding and display(PC)

PC IP:192.168.8.8
TK1 IP:192.168.8.6

PC collect data from Logitech’s c920 camera and send h264 stream to TK1 .

gst-launch-1.0 -e v4l2src device=/dev/video0 ! 'video/x-h264, width=(int)1920, height=(int)1080,  framerate=30/1' ! h264parse ! rtph264pay config-interval=1 ! udpsink host=192.168.8.6 port=5000 sync=false

TK1 decode h264 and use hardware encoding of MJPEG .

gst-launch-1.0 -e udpsrc port=5000 caps="application/x-rtp, media=(string)video, encoding-name=(string)H264" ! rtph264depay ! h264parse ! omxh264dec ! nvvidconv ! "video/x-raw(memory:NVMM)"! nvjpegenc ! rtpjpegpay ! udpsink host=192.168.8.8 port=5000

PC receive MJPEG and display.

gst-launch-1.0 -e udpsrc port=5000 ! application/x-rtp,encoding-name=JPEG,payload=26 ! rtpjpegdepay ! jpegdec ! videoconvert !  'video/x-raw, format=(string)UYVY' ! fpsdisplaysink sync=false video-sink="autovideosink"

The result is PC send 30fps h264 and receive 16fps MJPEG.
when software encoding replace hardware encoding, PC will receive 30fps MJPEG.

gst-launch-1.0 -e udpsrc port=5000 caps="application/x-rtp, media=(string)video, encoding-name=(string)H264" ! rtph264depay ! h264parse ! omxh264dec ! videoconvert  ! jpegenc ! rtpjpegpay ! udpsink host=192.168.8.8 port=5000

my question:
what is the cause of this issue and how to solve it.

Hi wucunyin,
nvjpegenc is mainly for single jpeg encoding, not for continuous jpeg encoding. Please use SW jpeg encoder in your case.