Flint's cheat-sheet for GStreamer on the NXP i.MX 8M Plus

mx8mplus-gstreamer-gists.txt

Flint's cheat-sheet for GStreamer on the NXP i.MX 8M Plus

Most of these Gists assume the use of two pieces of hardware:
NXP i.MX 8M Plus Evaluation Kit: 8MPLUSLPD4-EVK i.MX 8M Plus EVK
NXP Basler MIPI 8 Mpixel (4K) camera kit

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Send camera video to HDMI display

export caps="video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)30/1, colorimetry=(string)2:6:5:1, interlace-mode=(string)progressive"

gst-launch-1.0 -v v4l2src device=/dev/video0 ! $caps ! waylandsink

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Use 2D GPU to resize video

export input="video/x-raw,width=1920,height=1080,framerate=30/1"
gst-launch-1.0 -v v4l2src device=/dev/video0 ! imxvideoconvert_g2d ! $input ! waylandsink

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Use tee to split video into multiple streams, then resize video, before sending to display

export size-1k="video/x-raw,width=1920,height=1080,framerate=30/1"
export size-vga="video/x-raw,width=640,height=480,framerate=30/1"
export size-qvga="video/x-raw,width=320,height=240,framerate=30/1"

gst-launch-1.0 -v v4l2src device=/dev/video0 ! imxvideoconvert_g2d ! $size-1k \
    ! tee name=t \
    t. ! queue ! imxvideoconvert_g2d ! $size-vga ! waylandsink \
    t. ! queue ! imxvideoconvert_g2d ! $size-qvga ! waylandsink

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AVC (h.264) encode multiple streams, save to file, while watching live

NOTE: h264parse is required after vpuenc_h264 before sending to mp4mux.

export size-1k="video/x-raw,width=1920,height=1080,framerate=30/1"
export size-vga="video/x-raw,width=640,height=480,framerate=30/1"
export size-qvga="video/x-raw,width=320,height=240,framerate=30/1"

gst-launch-1.0 -v v4l2src device=/dev/video0 \
 ! imxvideoconvert_g2d ! $size-1k \
 ! tee name=t \
  t. ! queue ! imxvideoconvert_g2d ! $size-vga  \
   ! vpuenc_h264 ! h264parse ! mp4mux ! filesink location=size-vga.mp4 \
  t. ! queue ! imxvideoconvert_g2d ! $size-qvga \
   ! vpuenc_h264 ! h264parse ! mp4mux ! filesink location=size-qvga.mp4 \
  t. ! queue ! waylandsink

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HEVC (h.265) encode multiple streams, save to file, while watching live

NOTE: h265parse is required after vpuenc_hevc before sending to mp4mux.

export size-1k="video/x-raw,width=1920,height=1080,framerate=30/1"
export size-vga="video/x-raw,width=640,height=480,framerate=30/1"
export size-qvga="video/x-raw,width=320,height=240,framerate=30/1"

gst-launch-1.0 -v v4l2src device=/dev/video0 \
 ! imxvideoconvert_g2d ! $size-1k \
 ! tee name=t \
  t. ! queue ! imxvideoconvert_g2d ! $size-vga  \
   ! vpuenc_hevc ! h265parse ! mp4mux ! filesink location=size-vga.mp4 \
  t. ! queue ! imxvideoconvert_g2d ! $size-qvga \
   ! vpuenc_hevc ! h265parse ! mp4mux ! filesink location=size-qvga.mp4 \
  t. ! queue ! waylandsink

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Specify HEVC (h.265) encoder bitrate

NOTE: bitrate is specified in kbps

export size-1k="video/x-raw,width=1920,height=1080,framerate=30/1"

gst-launch-1.0 -v v4l2src device=/dev/video0 \
 ! imxvideoconvert_g2d ! $size-1k \
 ! vpuenc_hevc vpuenc_hevc bitrate=2000 ! h265parse \
 ! mp4mux ! filesink location=size-1k.mp4

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