v0.6.0

Smelter 0.6.0

💥 Breaking changes

• Rename var<push_constant> to var<immediate> in user-provided shaders (#1624 by @noituri)
• User-provided shaders now need to include enable wgpu_binding_array;. (#2025) by @noituri)
• Replace url field with stream_key in RTMP input, port is now defined globally via SMELTER_RTMP_SERVER_PORT (#1656, #1677 by @wkazmierczak)
• Rename vk-video feature to gpu-video (#1942) by @jerzywilczek
• Remove offset_ms from WHIP and WHEP inputs (#1974, #1857 by @wkozyra95)
• Remove offset_ms from RTMP input (#1656, #1677 by @wkazmierczak)

✨ New features

• Add bitrate option to software encoders (#1567 by @JBRS307)
• Add keyframe_interval_ms option to all encoders (#1591 by @JBRS307)
• Make framerate and resolution optional for V4L2 input (#1587 by @jerzywilczek)
• Support BGRA and ARGB textures in DeckLink input (#1607, #1608, #1614 by @wkozyra95)
• Add options to all WebRTC inputs/outputs to manage ICE candidates (#1727, #1734 by @wkozyra95)
  • SMELTER_WEBRTC_UDP_PORT_RANGE
  • SMELTER_WEBRTC_UDP_MUX_PORT
  • SMELTER_WEBRTC_1_TO_1_NAT_IPS
• Add pause support for inputs (#1798, #1843 by @wkozyra95)
• Add seek support for MP4 input (#1817, #1830 by @wkozyra95)
• Add /input/:id/update endpoint for pause and seek operations (#1798, #1817 by @wkozyra95)
• Add side_channel option to all inputs for sharing input data with external processes (#1899 by @wkozyra95)
• Add buffer_size_ms option to RTP, WHIP, and WHEP inputs to configure jitter buffer size (#1974 by @wkozyra95)
• Add AUDIO_INPUT_PAUSED and VIDEO_INPUT_PAUSED WebSocket events (#1843 by @wkozyra95)
• Add OUTPUT_ERROR WebSocket event when output/input fails after initialization (#1753 by @wkozyra95)
• RTMPS support for RTMP input (#1777, #1677 by @wkazmierczak)

🐛 Bug fixes

• Fix audio artifacts on WebRTC jitter-buffer changes (#1639 by @wkozyra95)

🔧 Others

• Add OpenAPI specification (#1692, #1703 by @JBRS307)
• Support FFmpeg 8.1 (#1833 by @JBRS307)
• Replace FFmpeg-based RTMP server implementation. (#1656, #1677 by @wkazmierczak)

v0.5.0

Smelter 0.5.0

💥 Breaking changes

• Rename decoder vulkan_video to vulkan_h264. (#1032 by @wkozyra95)
• Replace video_decoder with codec specific decoder_map option in MP4 input. (#1032 by @wkozyra95)
• Remove audio field in WHIP input (#997 by @wkazmierczak)
• Remove decoder/encoder options in WHIP input/output with decoder_preferences/encoder_preferences. (#1061, #1084 by @wkazmierczak)
• Move channels field from encoder to audio options. (#1067 by @wkazmierczak)
• Remove forward_error_correction option for OPUS in RTP and WHIP inputs. (#1156 by @JBRS307)
• Rename whip input name to whip_server and whip output name with whip_client. (#1245 by @wkazmierczak)

✨ New features

• Add RTMP client output. (#1051 by @WojciechBarczynski, @wkozyra95)
• Add support for VP8 and VP9 codecs. (#988, #1040, #1043, #1093 by @wkazmierczak)
• Add decoder/encoder preferences on WHIP input/output (#997, #1061, #1070, #1084 by @wkazmierczak)
• Add forward_error_correction option for Opus encoder in RTP and WHIP outputs (#1159, #1176 by @JBRS307)
• Add HLS input. (#1158 by @noituri)
• Add HLS output. (#1167 by @noituri)
• Add WHEP server output. (#1196 by @wkazmierczak)
• Add support for Vulkan-based H264 encoder (via vk-video). (#1244 by @noituri)
• Add WHEP client input. (#1376 by @wkazmierczak)
• Add jitter buffer to RTP, WHIP and WHEP inputs (#1489 by @wkozyra95)
• Add experimental support for RTMP server input. (#1525 by @wkazmierczak)
• Add experimental support for V4L2 API as an input. (#1560 by @jerzywilczek)

🐛 Bug fixes

• Fix web renderer crashing when multiple Smelter instances are run. (#1016 by @noituri)
• Fix web renderer's chromium_embedding. (#1033 by @noituri)
• Fix memory leaks in web renderer. (#1068 by @noituri)

v0.4.2

Smelter 0.4.2

🐛 Bug fixes

• Fix web renderer crashing when multiple Smelter instances are run. (#1016 by @noituri)
• Fix web renderer's chromium_embedding. (#1033 by @noituri)

v0.4.1

Smelter 0.4.1

🐛 Bug fixes

• Fix DeckLink color tint (green tint on output). (#1000 by @wkozyra95)
• Fix AAC codec information in MP4 output. (#998, #999 by @wkozyra95)

v0.4.0

Smelter 0.4.0

Live Compositor is now Smelter. You can find our new documentation at smelter.dev.

💥 Breaking changes

• Dropped support for SHADER_UNUSED_VERTEX_OUTPUT wgpu feature. (#733 by @jerzywilczek)
• Renamed component properties describing color. Remove _rgba suffix. (#896 by @BrtqKr)
• Replaced the LIVE_COMPOSITOR_OUTPUT_SAMPLE_RATE configuration environment variable with LIVE_COMPOSITOR_MIXING_SAMPLE_RATE. The output sample rate is now determined using encoder options on register_output. Changed the default output sample rate for AAC codec to 44100 Hz. (#925 by @WojciechBarczynski)
• Changed prefix of all environment variables LIVE_COMPOSITOR_ → SMELTER_. (#941 by @wkozyra95)

✨ New features

• Added loop option for MP4 input. (#699 by @WojciechBarczynski)
• Added LIVE_COMPOSITOR_LOG_FILE environment variable to enable logging to file (#853 by @wkozyra95)
• Added border, border radius, and box-shadow options to Rescaler and View components. (#815 by @WojciechBarczynski), (#839, #842, #858 by @wkozyra95)
• Extended supported color formats. (#896 by @BrtqKr)
• Allowed specifying output sample rates per output in register_output requests. (#925 by @WojciechBarczynski)
• Added WHIP server as an input. (#881 by @wkazmierczak)
• Added WHIP client as an output. (#834 by @wkazmierczak, @brzep)
• Added Vulkan based hardware decoder. (#803, #875 by @jerzywilczek)
• Added padding options to View component. (#931 by @noituri)

🐛 Bug fixes

• Fixed AAC output unregister before the first sample. (#714 by @WojciechBarczynski)
• Fixed output mp4 timestamps when output is registered after pipeline start. (#731 by @WojciechBarczynski)

🔧 Others

• Now we automatically rename the file under the output path for MP4 output if it already exists. (#684 by @WojciechBarczynski)
• video.encoder.preset is now optional in the output register. (#782 by @WojciechBarczynski)
• Now we use FFmpeg option -movflags faststart when creating *.mp4 files. (#807 by @jerzywilczek)
• Now, *.mp4 duration is being returned when registering inputs. (#890 by @wkozyra95)

v0.4.0-rc.0

[ts-sdk] Fix create-smelter-app after switch to pnpm (#944)

v0.3.0

Live Compositor 0.3.0

💥 Breaking changes

• Remove forward_error_correction option from RTP OPUS output. (#615 by @wkozyra95)

✨ New features

• Support DeckLink cards as an input. (#587, #597, #598, #599 by @wkozyra95)
• Add LIVE_COMPOSITOR_INPUT_BUFFER_DURATION_MS environment variable to control input stream buffer size. (#600 by @wkozyra95)
• Add endpoint for requesting keyframe on the output stream. (#620 by @WojciechBarczynski)
• Add MP4 output (#657 by @WojciechBarczynski)
• Add OUTPUT_DONE WebSocket event (#658 by @WojciechBarczynski)

🐛 Bug fixes

• Fix input queueing when some of the inputs do not produce frames/samples. (#625 by @wkozyra95)

v0.3.0-rc.0

Optimize CI speed (#644)

v0.2.0

Live Compositor 0.2.0

We're excited to release the first stable version of Live Compositor, a multimedia server designed for real-time, low latency, and programmable video and audio mixing. Transform your multimedia projects with Live Compositor. Visit our website to get started.

🚀 Why Choose Live Compositor?

Simple declarative API

Mixing is specified using simple component tree, easy to pick up for anyone familiar with web development.

Easy Integration

Language agnostic API. You can leverage tech stack of your choice and easily integrate it with your own solutions.

Real-time and low latency

LiveCompositor targets real-time use cases, with a significant focus on situations where latency is critical.

🌐 Key Features

• Batteries included: Render text, images, GIFs or websites, and combine them using builtin components.
• Highly customizable: Create custom effects with WGSL shaders.
• Audio support: Mix audio directly in LiveCompositor.
• Animations: Change layouts on the fly with animated transitions..
• Real-time processing: Process live streams in real-time with low latency.

demos.mp4

v0.2.0-rc.6

Fix aarch64 release (#544)