diff --git a/tools/chatgui/tests/test_call_video_encoder.cpp b/tools/chatgui/tests/test_call_video_encoder.cpp
index de7e1784..d20d6b53 100644
--- a/tools/chatgui/tests/test_call_video_encoder.cpp
+++ b/tools/chatgui/tests/test_call_video_encoder.cpp
@@ -3,6 +3,7 @@
 #include <QtTest>
 #include "../src/call_video_encoder.h"
 #include "../src/call_video_decoder.h"
+#include "../../../src/call/call_video_bitstream.h"
 extern "C" {
 #include "debug_config.h"
 #include "stream/stream_media.h"
@@ -49,6 +50,24 @@ private slots:
         auto caps = CallVideoDecoder::capabilities();
         QCOMPARE(caps.decode[0].profiles, uint8_t(3)); QCOMPARE(caps.decode[1].profiles, uint8_t(1));
         QCOMPARE(caps.encode[0].width, uint16_t(0)); QCOMPARE(caps.encode[1].width, uint16_t(0));
+        const QString directory = qEnvironmentVariable("UTUN_CALL_VIDEO_REMOTE_DIR");
+        if (!directory.isEmpty()) {
+            auto files = QDir(directory).entryList({"*-codec*.idr"}, QDir::Files); QVERIFY(!files.isEmpty());
+            for (const auto& name : files) {
+                QFile file(QDir(directory).filePath(name)); QVERIFY(file.open(QIODevice::ReadOnly)); auto bytes = file.readAll();
+                int codec = name.endsWith("-codec1.idr") ? 1 : 2;
+                call_video_bitstream actual{};
+                QVERIFY(!call_video_inspect_key(codec, reinterpret_cast<const uint8_t*>(bytes.constData()), bytes.size(), &actual));
+                call_video_frame f{}; f.call_id = 1; f.flags = CALL_VIDEO_KEY; f.size = f.length = bytes.size();
+                f.data = reinterpret_cast<const uint8_t*>(bytes.constData());
+                f.format = {1, (uint16_t)actual.width, (uint16_t)actual.height, 30, 0, (uint8_t)codec,
+                    (uint8_t)actual.level, 4000000, (uint8_t)actual.profile};
+                CallVideoDecoder decoder;
+                for (unsigned i = 0; i < 4; ++i) { f.frame_id = i + 1; f.pts_us = 1000000 + i * 33333;
+                    QImage image; QVERIFY2(decoder.decode(f, image), qPrintable(name)); }
+                DEBUG_INFO(DEBUG_CATEGORY_CALL, "hardware stream decoded file=%s", qPrintable(name));
+            }
+        }
     }
     void switchesAtScheduledIdr() {
         QFETCH(int, codec);