diff --git a/src/video/video.c b/src/video/video.c
index 124af57b..4e42d510 100644
--- a/src/video/video.c
+++ b/src/video/video.c
@@ -103,8 +103,7 @@ static void video_av_log_cb(void* avcl, int level, const char* fmt, va_list vl)
             && (strstr(buf, "::SubmitInput() : format") || strstr(buf, "SubmitToEncoder() End: frame pts=")
                 || strstr(buf, "::QueryOutput()") || strstr(buf, "QueryOutput() End: frame pts="))) return;
         DEBUG_TRACE(DEBUG_CATEGORY_DEBUG, "ffmpeg AMF encoder=%s: %s", encoder, buf);
-    }
-    else if (level <= AV_LOG_ERROR) DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "ffmpeg: %s", buf);
+    } else if (level <= AV_LOG_ERROR) DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "ffmpeg: %s", buf);
     else                            DEBUG_WARN(DEBUG_CATEGORY_VIDEO, "ffmpeg: %s", buf);
 }
 
diff --git a/tools/chatgui/src/live_video_encoder.cpp b/tools/chatgui/src/live_video_encoder.cpp
index a4d7fd08..7407537b 100644
--- a/tools/chatgui/src/live_video_encoder.cpp
+++ b/tools/chatgui/src/live_video_encoder.cpp
@@ -390,6 +390,22 @@ bool LiveVideoEncoder::encode(const QImage& image, uint64_t pts, bool key, QList
         int stride[4] = {static_cast<int>(canvas.bytesPerLine()), 0, 0, 0};
         result = sws_scale(m->scale, input, stride, 0, canvas.height(), m->frame->data, m->frame->linesize);
     }
+    if (result >= 0 && m->reportTimer.elapsed() >= 1000 && debug_should_output(DEBUG_LEVEL_TRACE, DEBUG_CATEGORY_DEBUG)
+        && (m->frame->format == AV_PIX_FMT_NV12 || m->frame->format == AV_PIX_FMT_YUV420P)) {
+        uint64_t edges = 0, samples = 0;
+        int minimum = 255, maximum = 0;
+        for (int y = 0; y + 1 < m->frame->height; y += 16) {
+            const uint8_t* row = m->frame->data[0] + y * m->frame->linesize[0];
+            for (int x = 0; x + 1 < m->frame->width; x += 16) {
+                int value = row[x]; minimum = std::min(minimum, value); maximum = std::max(maximum, value);
+                edges += std::abs(value - row[x + 1]) + std::abs(value - row[x + m->frame->linesize[0]]); samples += 2;
+            }
+        }
+        DEBUG_TRACE(DEBUG_CATEGORY_DEBUG,
+            "video encoder input name=%s pts=%llu source=%dx%d encoded=%dx%d pixel=%d luma_min=%d luma_max=%d edge_x1000=%llu",
+            qPrintable(m->name), (unsigned long long)pts, image.width(), image.height(), m->frame->width, m->frame->height,
+            m->frame->format, minimum, maximum, (unsigned long long)(samples ? edges * 1000 / samples : 0));
+    }
     bool constrained = m->config.profile != LiveVideoProfile::Automatic;
     if (constrained && m->timestamps.size() >= 8) {
         m->error = "GPU encoder exceeded the bounded input pipeline";
diff --git a/tools/chatgui/tests/test_stream_publish.cpp b/tools/chatgui/tests/test_stream_publish.cpp
index 29391273..b7f0aa2a 100644
--- a/tools/chatgui/tests/test_stream_publish.cpp
+++ b/tools/chatgui/tests/test_stream_publish.cpp
@@ -210,6 +210,9 @@ private slots:
         av_log(context, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST driver value=%d\n", 17);
         QCOMPARE(ffmpegDiagnosticMessages.size(), 1);
         QVERIFY(ffmpegDiagnosticMessages.front().contains("encoder=hevc_amf: UTUN_AMF_LOG_TEST driver value=17"));
+        av_log(context, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST Debug: AMFEncoderUVEHEVCImpl::QueryOutput()\n");
+        av_log(context, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST Trace: SubmitToEncoder() End: frame pts=17\n");
+        QCOMPARE(ffmpegDiagnosticMessages.size(), 1);
         codec.name = "libx264";
         av_log(context, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST unrelated encoder\n");
         av_log(nullptr, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST unrelated context\n");
@@ -220,6 +223,10 @@ private slots:
         av_log(nullptr, AV_LOG_ERROR, "UTUN_AMF_LOG_TEST normal error\n");
         QCOMPARE(ffmpegDiagnosticMessages.size(), 2);
         QVERIFY(ffmpegDiagnosticMessages.back().contains("normal error"));
+        debug_set_category_level(DEBUG_CATEGORY_DEBUG, DEBUG_LEVEL_TRACE);
+        av_log(context, AV_LOG_DEBUG, "UTUN_AMF_LOG_TEST Warning: AMFEncoderUVEHEVCImpl::QueryOutput() failed\n");
+        QCOMPARE(ffmpegDiagnosticMessages.size(), 3);
+        QVERIFY(ffmpegDiagnosticMessages.back().contains("Warning:"));
 #else
         QSKIP("FFmpeg unavailable");
 #endif