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fixed srt stream url stuff

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legop3
2026-06-27 16:18:55 -04:00
parent 8e322ed57b
commit 0cfc16528b
7 changed files with 12 additions and 62 deletions
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pi/roverd/config.go
+1 -35
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@@ -316,9 +316,6 @@ func LoadConfig(path string) (*Config, error) {
}
cfg.Media.AudioForwardURL = derived
}
cfg.Media.PublishURL = normalizeSRTURLForLowLatency(cfg.Media.PublishURL)
cfg.Media.AudioPublishURL = normalizeSRTURLForLowLatency(cfg.Media.AudioPublishURL)
cfg.Media.AudioForwardURL = normalizeSRTURLForLowLatency(cfg.Media.AudioForwardURL)
if err := validateServoConfig(&cfg.CameraServo); err != nil {
return nil, fmt.Errorf("cameraServo: %w", err)
}
@@ -466,40 +463,9 @@ func deriveSRTURL(serverURL, streamName string, port int, mode string) (string,
port = 9000
}
escaped := url.PathEscape(streamName)
return fmt.Sprintf("srt://%s:%d?streamid=%%23%%21::r=%s,m=%s&latency=20000&mode=caller&transtype=live&pkt_size=1316", host, port, escaped, mode), nil
return fmt.Sprintf("srt://%s:%d?streamid=#!::r=%s,m=%s&latency=10&mode=caller&transtype=live&pkt_size=1316", host, port, escaped, mode), nil
}
func normalizeSRTURLForLowLatency(raw string) string {
trimmed := strings.TrimSpace(raw)
if trimmed == "" || !strings.HasPrefix(trimmed, "srt://") {
return raw
}
// SRT stream IDs commonly start with "#!::". In a URL, a literal "#"
// begins the fragment section, so ffmpeg/libsrt can ignore query options
// placed after it. MediaMTX then falls back to the SRT default latency,
// which showed up in diagnostics as a 120 ms receive delay even though the
// URL text contained latency=10. Percent-encoding only the "#!" prefix keeps
// MediaMTX's stream ID parser behavior while allowing latency/mode/transtype
// to remain real SRT query parameters.
normalized := strings.ReplaceAll(trimmed, "streamid=#!::", "streamid=%23%21::")
// ffmpeg's SRT latency URL option is expressed in microseconds. Use 20 ms as
// the default interactive rover target: much lower than the 120 ms fallback,
// but not so aggressive that tiny LAN jitter immediately causes drops.
if srtLegacyLatencyRe.MatchString(normalized) {
normalized = srtLegacyLatencyRe.ReplaceAllString(normalized, "${1}20000${2}")
} else if !strings.Contains(normalized, "latency=") {
separator := "&"
if !strings.Contains(normalized, "?") {
separator = "?"
}
normalized += separator + "latency=20000"
}
return normalized
}
var srtLegacyLatencyRe = regexp.MustCompile(`([?&]latency=)10($|&)`)
var hexColorRe = regexp.MustCompile(`^#[0-9A-Fa-f]{6}$`)
func normalizeHexColor(raw string) (string, error) {