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Comparison · Meetings
CasparCG Server vs SRS
A side-by-side editorial comparison of CasparCG Server and SRS — release velocity, themes, recent moves, and the top alternatives to consider.
CasparCG Server vs SRS: at a glance
What is CasparCG Server?
Broadcast playout server reaches for HDR and sets a hardware floor to get there
CasparCG Server ships stable releases roughly once or twice a year, with long RC and beta runs ahead of each major. The 2.4 line delivered resolution and control-surface breadth — 8K and 4K DCI frames, custom resolutions, an interlaced mixer pipeline for field accuracy, AMCP command batching. The current 2.5.0 stable turns to colour and deployment: initial HDR support, ffmpeg 7.0, headless Linux operation, and Ubuntu deb packaging.
What is SRS?
SRS opens a 7.0 line built on a Go proxy tier, and drops features it no longer wants to carry.
SRS shipped the stable 6.0 line's first release on 12 August and, three hours later, the first development build of 7.0. The 6.0 line is now in pure maintenance — the r1 changelog is seven merges of DVR, WebRTC and edge fixes. Everything new is in 7.0-d0: RTSP playback, RTMPS, IPv6 across every protocol, HEVC in both directions between RTMP and WebRTC, and HLS fMP4 segments for HEVC and LL-HLS.
CasparCG Server vs SRS: editorial side-by-side
CasparCG Server
0.0MEETINGS
Broadcast playout server reaches for HDR and sets a hardware floor to get there
◆ Current state
CasparCG Server ships stable releases roughly once or twice a year, with long RC and beta runs ahead of each major. The 2.4 line delivered resolution and control-surface breadth — 8K and 4K DCI frames, custom resolutions, an interlaced mixer pipeline for field accuracy, AMCP command batching. The current 2.5.0 stable turns to colour and deployment: initial HDR support, ffmpeg 7.0, headless Linux operation, and Ubuntu deb packaging.
◆ Where it's heading
The project is modernizing the parts of a playout server that determine whether it can sit in a current broadcast chain — colour pipeline, pixel format fidelity, and where it can run. That comes with an explicit hardware bargain: AVX2 is recommended now and becomes a requirement in 2.6, trading compatibility with pre-2013 CPUs for the instruction set HDR and the embedded Chrome renderer need. Alongside, Decklink and NDI integration keep absorbing steady fix work.
◆ Prediction
2.6 should complete the AVX2 transition and widen HDR beyond the current subset of producers and consumers, since the 2.5 notes describe HDR as deliberately partial.
SRS
6.3MEETINGS
SRS opens a 7.0 line built on a Go proxy tier, and drops features it no longer wants to carry.
◆ Current state
SRS shipped the stable 6.0 line's first release on 12 August and, three hours later, the first development build of 7.0. The 6.0 line is now in pure maintenance — the r1 changelog is seven merges of DVR, WebRTC and edge fixes. Everything new is in 7.0-d0: RTSP playback, RTMPS, IPv6 across every protocol, HEVC in both directions between RTMP and WebRTC, and HLS fMP4 segments for HEVC and LL-HLS.
◆ Where it's heading
The project is trading breadth of legacy surface for a narrower, better-covered core. 7.0-d0 removes the embedded GB28181 SIP server, multi-threading, Cygwin, and most configuration hot reload, while introducing a Go proxy server and origin-cluster architecture alongside the C++ media core. Protocol coverage keeps generalizing — each release makes a codec or an address family a property of the server rather than of one delivery path.
◆ Prediction
Expect the 7.0 line to run a long alpha and beta train the way 6.0 did, with the Go proxy and origin clustering carrying most of the remaining work and 6.0 continuing to receive backported fixes in parallel.
Alternatives to CasparCG Server and SRS
Other Meetings products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either CasparCG Server or SRS.
Wowza
Wowza keeps arguing its case for detection inside the streaming pipeline
Vimeo
Vimeo ships another batched product post: six changes to embeds and the player
Switcher Studio
Switcher Studio's feed is a livestreaming how-to blog, not a changelog
Mux
Every manual control Mux ships now arrives with a Robots workflow that does it for you
WebinarJam
WebinarJam's feed is a funnel-marketing curriculum with no product releases in it.
See all CasparCG Server alternatives → · See all SRS alternatives →
Recent activity from CasparCG Server and SRS
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6d agoSRSSRS 7.0-d0: Go proxy tier, RTSP playback, IPv6 across protocols ⚡
- 6d agoSRS6.0-r1: DVR, WebRTC and edge fixes on the stable line
- 8mo agoCasparCG Server2.5.0 brings initial HDR, headless Linux and an AVX2 baseline ⚡
- 8mo agoSRSSRS 6.0 goes stable with H.265 across RTMP, HLS, TS and SRT ⚡
- 9mo agoSRS6.0-b3: use-after-free and HLS cleanup fixes
- 10mo agoSRS6.0-b2: configurable SRT stream IDs and a WHIP transcoding fix
- 11mo agoSRS6.0-b1: RTC crash fixes, Windows binary dropped
- 1y agoCasparCG Server2.4.3 clears crashes across FFmpeg, Decklink and HTML producers
- 1y agoCasparCG Server2.4.2 restores Decklink driver 14.3 compatibility
- 1y agoCasparCG Server2.4.1 fixes Decklink subregions, EXIF rotation and NDI source listing
- 2y agoCasparCG Server2.4.0 adds 8K and 4K DCI frames plus AMCP command batching
- 2y agoCasparCG Server2.4.0 RC1 preview of the 2.4 feature set
Frequently asked questions
What is the difference between CasparCG Server and SRS?
They serve adjacent needs but don't currently overlap on shipped themes. SRS is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is CasparCG Server better than SRS?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. SRS is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Meetings products to evaluate alongside.
What are the best alternatives to CasparCG Server?
Top CasparCG Server alternatives in Meetings are ranked by recent ship velocity. Browse the "CasparCG Server alternatives" section above for the current picks, or visit /alternatives/casparcg-server for the full list with editorial commentary on each.
What are the best alternatives to SRS?
Top SRS alternatives in Meetings are ranked by recent ship velocity. Browse the "SRS alternatives" section above for the current picks, or visit /alternatives/srs for the full list with editorial commentary on each.