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51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
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# Mixing video (GStreamer command-line cheat sheet)
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### Picture in picture
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Here we have two source (mp4) files, which should be set as environment variables `$SRC` and `$SRC2`
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```
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gst-launch-1.0 \
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filesrc location="$SRC2" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=640,height=360 ! \
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videomixer name=mix sink_0::alpha=1 sink_1::alpha=1 ! \
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videoconvert ! autovideosink \
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filesrc location="$SRC" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=320,height=180! \
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mix.
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```
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Put a box around the in-picture using ‘videobox’ e.g.
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```
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gst-launch-1.0 \
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filesrc location="$SRC2" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=640,height=360 ! \
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videomixer name=mix sink_0::alpha=1 sink_1::alpha=1 ! \
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videoconvert ! autovideosink \
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filesrc location="$SRC" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=320,height=180! \
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videobox border-alpha=0 top=-10 bottom=-10 right=-10 left=-10 ! \
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mix.
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```
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Choose where the in-picture goes with the ‘xpos’ and ‘ypos’ attributes of videomixer, e.g.
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```
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gst-launch-1.0 \
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filesrc location="$SRC2" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=640,height=360 ! \
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videomixer name=mix sink_0::alpha=1 sink_1::alpha=1 sink_1::xpos=50 sink_1::ypos=50 ! \
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videoconvert ! autovideosink \
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filesrc location="$SRC" ! \
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decodebin ! videoconvert ! \
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videoscale ! video/x-raw,width=320,height=180! \
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mix.
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```
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