highascg

Custom CasparCG server build (PRs #1718–#1720)

HighAsCG can generate casparcg.config XML for a custom casparcg-server binary that includes:

• PR #1718 — Screen consumer: flexible aspect-ratio, enable-mipmaps, multi-display spanning (see upstream PR for full behavior). On NVIDIA hosts keep <vsync>true</vsync> and Sync to VBlank off in NVIDIA Settings — screen-consumer-vsync-nvidia.md.
• PR #1719 — OAL consumer: video-scheduled audio (no extra HighAsCG XML; use stock OpenAL / system-audio paths).
• PR #1720 — PortAudio consumer: ASIO multi-channel output with configurable device-name, output-channels, buffer/latency/FIFO, auto-tune-latency.

Settings

1. Open Application Settings (gear icon) → System tab. Under Caspar config deploy, set Caspar server build to Custom build (PRs #1718–#1720). (It is not on the Connection tab; per-screen extras are on Screens.)
2. On the Screens tab, per main screen (PGM), optional:
   • Aspect ratio — e.g. 16:9, 3840:1080 (inside <screen>).
   • Enable mipmaps — for LED walls.
   • PortAudio — check Enable PortAudio consumer, pick an output device from the autocomplete list (Refresh list) or type a name. Enumeration uses the optional native module naudiodon when it builds; if it does not (toolchain/Node version), Linux falls back to aplay -L via alsa-utils — names usually match PortAudio’s ALSA backend. You can always type a device string manually. The list reflects the machine running HighAsCG; if Caspar runs elsewhere, match names on the playout host. This disables OpenAL program <system-audio> for that screen to avoid duplicate PGM audio consumers.
3. Write & restart or Download casparcg.config as usual.

Stock Caspar

If Caspar server build is Stock, the generator does not emit <portaudio> or the extra screen tags. Use this for official CasparCG 2.5 releases.

Troubleshooting

No consumer factory registered for element name portaudio

Caspar is loading a casparcg.config that contains <portaudio>…</portaudio>, but the casparcg-server binary you are running was not linked with the PortAudio consumer (PR #1720). Typical cases:

• Official CasparCG 2.5 packages — no PortAudio consumer.
• A custom build that only merged screen/OAL changes but not PR #1720, or CMake built without that module.

Fix: Either install and run a binary that includes the PortAudio consumer, or in HighAsCG disable Enable PortAudio consumer for every screen (and/or set Caspar server build to Stock), then Write & restart so the config no longer contains <portaudio>.

The screen / aspect-ratio / mipmaps parts (PR #1718) use a different code path — if those work but PortAudio does not, the problem is specifically the PortAudio plugin in your Caspar build.

References

• WO-07 — upstream integration work order.
• GitHub PRs: #1718, #1719, #1720.

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