topic Re: Pull RTSP stream failed on i.MX 8MP in i.MX Processors

Pull RTSP stream failed on i.MX 8MP

noway — Mon, 03 Nov 2025 03:30:21 GMT

hi, community

# iMX 8MP

@ Harvey021

I missed an issue during pull rtsp stream.

The "RTSP_URL" has has been verified using VLC.

Video coding: H264

command: gst-launch-1.0 rtspsrc location=$RTSP_URL queue ! rtph264depay ! v4l2h264dec ! autovideosink

target image version: linux6.6.36 full

target machine: i.MX 8mp

noway_1-1762140306278.png

Re: Pull RTSP stream failed on i.MX 8MP

Zhiming_Liu — Tue, 04 Nov 2025 01:53:45 GMT

Hi,

Please try to use below command.

gst-launch-1.0 -v rtspsrc location=$RTSP_URL protocols=tcp latency=100 ! rtph264depay ! avdec_h264 ! autovideosink

Best Regards,
Zhiming

Re: Pull RTSP stream failed on i.MX 8MP

noway — Wed, 05 Nov 2025 08:38:28 GMT

He indicated that the avdec_h264 was not found.

noway_0-1762331427583.png

And then I try the v4l2h264dec, Nor was it successful. Please refer to the attachment for the error log.

trying command: gst-launch-1.0 -v rtspsrc location=$RTSP_URL protocols=tcp latency=100 ! rtph264depay ! v4l2h264dec ! autovideosink > pull.log 2>&1

Re: Pull RTSP stream failed on i.MX 8MP

Zhiming_Liu — Mon, 10 Nov 2025 06:24:29 GMT

Hi,

Please try below command to split audio and video configuration.

gst-launch-1.0 -v rtspsrc location=xxxxx name=src protocols=tcp latency=100 \
  src. ! queue ! application/x-rtp,media=video,encoding-name=H264,payload=96  ! rtph264depay ! h264parse ! v4l2h264dec! videoconvert ! autovideosink \
  src. ! queue ! application/x-rtp,media=audio,encoding-name=MPEG4-GENERIC,payload=97 ! rtpmp4gdepay ! aacparse ! avdec_aac ! audioconvert ! audioresample ! autoaudiosink

Best Regards,
Zhiming

Re: Pull RTSP stream failed on i.MX 8MP

noway — Mon, 10 Nov 2025 09:48:55 GMT

Thank you for your reply, the decoding is now working. However, I still have two issues:

When I change the video resolution from 1080p to 2K, it cannot decode

Please refer to the attached file "pull.log" for the log.

2. When decoding with Python, I found it takes 0.4 seconds to get one frame of data - why is it so slow? Please refer to the attached file "rtsp.py" for the code.

noway_0-1762767557119.png

Re: Pull RTSP stream failed on i.MX 8MP

Zhiming_Liu — Tue, 11 Nov 2025 02:30:39 GMT

Hi @noway

If you want to decode video for 60FPS, the maximum resolution is 1080p, the gstreamer has limited maximum resolution. The performance will decrease as the resolution increases on VPU.

For the opencv, you can try below configuration.

gst = f"rtspsrc location={RTSP_URL} protocols=tcp latency=50 ! " \ f"rtph265depay ! h265parse config-interval=-1 ! " \ f"decodebin ! videoconvert ! video/x-raw,format=BGR ! " \ f"queue max-size-buffers=1 leaky=downstream ! " \ f"appsink drop=true max-buffers=1 sync=false" cap = cv2.VideoCapture(gst, cv2.CAP_GSTREAMER)

Best Regards,
Zhiming

Re: Pull RTSP stream failed on i.MX 8MP

noway — Tue, 11 Nov 2025 02:55:37 GMT

The video's fps is 10. The following is the detailed information.

noway_0-1762829616720.png

Re: Pull RTSP stream failed on i.MX 8MP

Zhiming_Liu — Tue, 18 Nov 2025 05:21:34 GMT

Hi,

Is there more information?

Best Regards,
Zhiming