Jetson TK1: How can I make a screencast with 30 FPS ?

Autonomous Machines Jetson & Embedded Systems Jetson TK1
1

Is there a better way to make a screencast ?

gst-launch -e ximagesrc ! ffmpegcolorspace ! nv_omx_h264enc ! mp4mux ! filesink location=video.mp4

This gstreamer pipeline looks to slow :-(

2

Using nvvidconv instead of ffmpegcolorspace might help a bit.

3

nvvidconv gave me an error:
ubuntu@tegra-ubuntu:~$ gst-launch -e ximagesrc ! nvvidconv ! nv_omx_h264enc ! mp4mux ! filesink location=video.mp4
WARNING: erroneous pipeline: could not link ximagesrc0 to nvvconv0

but avconv looks better:
avconv -f x11grab -r 30 -s 1920x1080 -i :0.0 -vcodec libx264 -preset ultrafast -threads 4 -y video.mp4
drawback: it looks like time is running faster when playing a video recorded with avconv :-(
10 seconds recorded video with avconv are played back with totem in 5 seconds.

4

I am having a similar problem; did you ever get nvvidconv to work?

5

Anyone figure this problem out? The “ximagesrc” output raw BGRX video data, and it should be ok as input source of “nvvidconv” based on it’s capabilities.

6

so it seems that nvvidconv only support “I420, UYVY, NV12, GRAY8” format as input source, is there have any hardware accelerated based RGB/BGRx converter for Tegra.

7

Hello, usaarizona:
Can you try Jetson TX1 R24.1? That version should have RGBx input support for nvvidconv.

br
ChenJian