seungha-yang / gstcefsrc

A simple gstreamer wrapper around Chromium Embedded Framework

gstcefsrc

Build

mkdir build && cd build
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..
make

Optional CMake variables

• CEF_VERSION allows to override the default CEF version
• CEF_BUILDS_HOMEPAGE_URL allows to configure the URL of the website hosting CEF binaries. Default is https://cef-builds.spotifycdn.com

Third-party CEF builds

The official CEF builds hosted by Spotify do not support patent-encumbered codecs such as H.264. If that is a feature you need in your project or for some reason you need to customize the Chromium build flags, you need to rebuild CEF yourself. Thankfully at least two projects can help you with that daunting task:

• https://github.com/reinismu/cefbuild : Docker to build cef with all codecs
• https://github.com/philn/cef-build-box : Semi-automatic and reproducible CEF build

Run

The element can then be tested with:

GST_PLUGIN_PATH=Release:$GST_PLUGIN_PATH gst-launch-1.0 \
    cefsrc url="https://soundcloud.com/platform/sama" ! \
    video/x-raw, width=1920, height=1080, framerate=60/1 ! cefdemux name=d d.video ! \
    queue max-size-bytes=0 max-size-buffers=0 max-size-time=3000000000 ! videoconvert ! \
    xvimagesink audiotestsrc do-timestamp=true is-live=true  volume=0.00 ! audiomixer name=mix ! \
    queue max-size-bytes=0 max-size-buffers=0 max-size-time=3000000000 ! audioconvert ! pulsesink \
    d.audio ! mix.

Record website video + audio (with audiomixer)

GST_PLUGIN_PATH=Release:$GST_PLUGIN_PATH gst-launch-1.0 -e \
    cefsrc url="https://soundcloud.com/platform/sama" ! \
    video/x-raw, width=1920, height=1080, framerate=60/1 ! \
    cefdemux name=demux ! queue ! videoconvert ! \
    queue max-size-bytes=0 max-size-buffers=0 max-size-time=3000000000 ! x264enc ! queue ! \
    mp4mux name=muxer ! filesink location='test.mp4' \
    audiotestsrc do-timestamp=true is-live=true  volume=0.0 ! audiomixer name=mix ! \
    queue max-size-bytes=0 max-size-buffers=0 max-size-time=3000000000 ! audioconvert ! \
    audiorate ! audioresample ! faac bitrate=128000 ! queue ! muxer. \
    demux. ! queue ! mix.

This will work with sites with no audio as well

cefsrc requires an X server environment on Linux, if none is available you can run the previous commands with xvfb-run:

xvfb-run --server-args="-screen 0 1920x1080x60" gst-launch-1.0 ...

In addition, a wrapper bin is exposed, wrapping cefsrc and cefdemux, and handling web+http, web+https and web+file protocols:

GST_PLUGIN_PATH=Release:$GST_PLUGIN_PATH gst-launch-1.0 \
    cefbin name=cef cefsrc::url="https://soundcloud.com/platform/sama" \
    cef.video ! video/x-raw, width=1920, height=1080, framerate=60/1 ! videoconvert ! xvimagesink \
    cef.audio ! audioconvert ! audiomixer ! autoaudiosink

gst-launch-1.0 playbin uri=web+https://www.soundcloud.com/platform/sama