Capture raw video and transcode to mkv container

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
1

Am having some issues trying to figure out the correct command line string to stream raw video from camera and transcode to mkv or mp4 container using gstreamer.
I currently can get the live feed using:

gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw, width=1920, height=1080, format=YUY2, framerate=60/1 ! xvimagesink -e

I don’t yet know exactly what I need (bitrate etc.) for the output file, I had hoped to just do some trial and error to try and get a filesize that works for my application.

If anyone can point me in the right direction, I would appreciate it!

3

Hi,
Please try the command:

$ gst-launch-1.0 -e v4l2src device=/dev/video0 num-buffers=300 ! video/x-raw, width=1920, height=1080, format=YUY2, framerate=60/1 ! nvvidconv ! nvv4l2h264enc ! h264parse ! matroskamux ! filesink location=test.mkv
4

Thank you that worked well. I had initially setup to do it via ffmpeg, but it was using 100% of all cores as it was not using hardware enc. Is there a way, that you know of to use ffmpeg with nvenc?

5

Hi,
We have a package enabling hardware decoding in ffmpeg:
Accelerated Decode with ffmpeg — NVIDIA Jetson Linux Developer Guide 1 documentation

For hardware encoding, please use gstreamer or jetson_multimedia_api

6

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