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gstreamer-cheat-sheet/images.md
Matthew Clark d06c015d36 Updates to memory transfer, RTMP, and images
2018-03-05 20:22:50 +00:00

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Images (GStreamer command-line cheat sheet)

Gstreamer can show images on video using the imagefreeze element.

Create a video from an image

Example imagefreeze single image

export PIC="https://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/263px-Wikipedia-logo-v2.svg.png"

gst-launch-1.0 \
    uridecodebin uri=$PIC ! \
    imagefreeze ! \
    autovideosink

Create a video from multiple images

Here's the same image four times, done with the help of compsitor (a mixer):

gst-launch-1.0 \
    compositor name=m sink_1::xpos=263 sink_2::ypos=240 sink_3::xpos=263 sink_3::ypos=240 ! autovideosink \
    uridecodebin uri=$PIC ! videoscale ! video/x-raw, width=263, height=240 ! imagefreeze ! m. \
    uridecodebin uri=$PIC ! videoscale ! video/x-raw, width=263, height=240 ! imagefreeze ! m. \
    uridecodebin uri=$PIC ! videoscale ! video/x-raw, width=263, height=240 ! imagefreeze ! m. \
    uridecodebin uri=$PIC ! videoscale ! video/x-raw, width=263, height=240 ! imagefreeze ! m.