diff --git a/tools/chatgui/src/call_video_decoder.cpp b/tools/chatgui/src/call_video_decoder.cpp
index 1854769c..09adcfa7 100644
--- a/tools/chatgui/src/call_video_decoder.cpp
+++ b/tools/chatgui/src/call_video_decoder.cpp
@@ -274,10 +274,10 @@ call_video_caps CallVideoDecoder::capabilities(const std::atomic<bool>* running)
                             4000000, (uint8_t)profile};
                         unsigned sent = 0, received = 0; bool valid = true, outputBeforeEos = false;
                         const int64_t start = call_video_playout_now_us();
-                        // Pacing нужен до первого выхода для измерения pipeline, затем проверяем drain принятых входов.
-                        while (valid && call_video_playout_now_us() - start < 1500000) {
+                        // Pacing измеряет pipeline до первого выхода; остальные из восьми кадров проверяются без пауз.
+                        while (valid && received < 8 && call_video_playout_now_us() - start < 1500000) {
                             if (cancelled()) return {};
-                            if (!outputBeforeEos && sent < 8 && call_video_playout_now_us() - start >= sent * 1000000ll / fps) {
+                            if (sent < 8 && (outputBeforeEos || call_video_playout_now_us() - start >= sent * 1000000ll / fps)) {
                                 input.frame_id = sent + 1; input.pts_us = 1000000 + sent * 1000000ll / fps;
                                 int result = decoder.submit(input); if (result < 0) valid = false; else if (result) ++sent;
                             }
@@ -289,11 +289,10 @@ call_video_caps CallVideoDecoder::capabilities(const std::atomic<bool>* running)
                                 if (!decoder.m->eos) outputBeforeEos = true;
                                 ++received;
                             }
-                            if ((outputBeforeEos || sent == 8) && decoder.finish() < 0) valid = false;
-                            if (decoder.m->eos && received == sent) break;
-                            if (valid) QThread::usleep(1000);
+                            if (sent == 8 && decoder.finish() < 0) valid = false;
+                            if (valid && received < 8) QThread::usleep(1000);
                         }
-                        valid = valid && sent && received == sent && outputBeforeEos;
+                        valid = valid && received == 8 && outputBeforeEos;
                         DEBUG_INFO(DEBUG_CATEGORY_CALL, "video decoder probe codec=%u profile=%u size=%ux%u fps=%u backend=%d "
                             "valid=%d inputs=%u outputs=%u pipeline=%u elapsed_us=%lld",
                             codec, profile, w, h, fps, int(backend), valid, sent, received, decoder.pipelineFrames(),
diff --git a/tools/chatgui/tests/test_call_video_gpu.cpp b/tools/chatgui/tests/test_call_video_gpu.cpp
index 139cb186..c144a92d 100644
--- a/tools/chatgui/tests/test_call_video_gpu.cpp
+++ b/tools/chatgui/tests/test_call_video_gpu.cpp
@@ -25,10 +25,10 @@ static QByteArray selected;
 static unsigned opened = 0, software = 0;
 static int depth = 1;
 static bool burst = false, badReplacement = false, badProbe = false;
-struct DecodePending { std::deque<AVFrame*> frames; bool eos = false; unsigned inputs = 0; };
+struct DecodePending { std::deque<AVFrame*> frames; bool eos = false; unsigned inputs = 0, outputs = 0; };
 static std::map<AVCodecContext*, DecodePending> decoderContexts;
 static bool delayedDecoder = false;
-static unsigned probeInputs = 0, probeOutputs = 0, probeMaxInputs = 0;
+static unsigned probeInputs = 0, probeOutputs = 0, probeMaxInputs = 0, probeFirstInputs = 0;
 
 extern "C" const AVCodec* __real_avcodec_find_encoder_by_name(const char*);
 extern "C" const AVCodec* __wrap_avcodec_find_encoder_by_name(const char* name) {
@@ -133,6 +133,7 @@ extern "C" int __wrap_avcodec_receive_frame(AVCodecContext* context, AVFrame* ou
     if (result < 0 && result != AVERROR(EAGAIN) && result != AVERROR_EOF) return result;
     if (state.frames.empty()) return result;
     if (!state.eos && state.frames.size() <= 2) return AVERROR(EAGAIN);
+    if (!state.outputs++) probeFirstInputs = std::max(probeFirstInputs, state.inputs);
     ++probeOutputs;
     av_frame_move_ref(output, state.frames.front()); av_frame_free(&state.frames.front()); state.frames.pop_front(); return 0;
 }
@@ -143,7 +144,7 @@ private slots:
     void initTestCase() { debug_config_init(); debug_set_level(DEBUG_LEVEL_WARN); av_log_set_level(AV_LOG_ERROR); }
     void init() {
         selected.clear(); opened = software = 0; depth = 1; burst = badReplacement = badProbe = delayedDecoder = false;
-        probeInputs = probeOutputs = probeMaxInputs = 0;
+        probeInputs = probeOutputs = probeMaxInputs = probeFirstInputs = 0;
         QVERIFY(contexts.empty()); QVERIFY(decoderContexts.empty());
     }
     void cleanup() { QVERIFY(contexts.empty()); QVERIFY(decoderContexts.empty()); }
@@ -156,7 +157,8 @@ private slots:
             QCOMPARE(limit.profiles, uint8_t(3)); QCOMPARE(limit.fps, uint16_t(60));
             QCOMPARE(limit.width, uint16_t(1920)); QCOMPARE(limit.height, uint16_t(1920));
         }
-        QVERIFY(probeInputs > 0); QCOMPARE(probeMaxInputs, 3u); QCOMPARE(probeOutputs, probeInputs);
+        QCOMPARE(probeInputs, 48u * 8); QCOMPARE(probeMaxInputs, 8u); QCOMPARE(probeFirstInputs, 3u);
+        QCOMPARE(probeOutputs, probeInputs);
         const unsigned before = probeInputs;
         const auto cached = CallVideoDecoder::capabilities();
         QCOMPARE(cached.decode[0].profiles, caps.decode[0].profiles); QCOMPARE(probeInputs, before);