diff --git a/tools/chatgui/src/call_video_decoder.cpp b/tools/chatgui/src/call_video_decoder.cpp
index 49c619f7..07be4ec9 100644
--- a/tools/chatgui/src/call_video_decoder.cpp
+++ b/tools/chatgui/src/call_video_decoder.cpp
@@ -1,4 +1,5 @@
 #include "call_video_decoder.h"
+#include "video_frame_image.h"
 #include "debug_config.h"
 #include "../../../src/call/call_video_bitstream.h"
 #include <QTransform>
@@ -88,7 +89,7 @@ bool CallVideoDecoder::decode(const call_video_frame& f, QImage& image) {
     valid = valid && (m->codec->profile == profile || (f.format.codec == CALL_VIDEO_H264
         && f.format.profile == CALL_VIDEO_BASELINE && m->codec->profile == AV_PROFILE_H264_BASELINE));
     if (valid) {
-        QImage output(decoded->width, decoded->height, QImage::Format_RGB888);
+        QImage output = video_frame_image(decoded->width, decoded->height);
         m->scale = sws_getCachedContext(m->scale, decoded->width, decoded->height, AV_PIX_FMT_YUV420P,
             decoded->width, decoded->height, AV_PIX_FMT_RGB24, SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
         if (!m->scale || output.isNull()) valid = false;
diff --git a/tools/chatgui/src/streamplayer_window.cpp b/tools/chatgui/src/streamplayer_window.cpp
index 18f406f3..ebc546b1 100644
--- a/tools/chatgui/src/streamplayer_window.cpp
+++ b/tools/chatgui/src/streamplayer_window.cpp
@@ -1,5 +1,6 @@
 #include "streamplayer_window.h"
 #include "videoplayer_window.h"
+#include "video_frame_image.h"
 #include "sound_manager.h"
 #include "../transport/stream_bridge.h"
 #include <QVBoxLayout>
@@ -178,8 +179,8 @@ void StreamPlayerWindow::tick() {
     }
     if (!image.isNull()) {
         m_render->setFrame(image); m_status->setText(text("Live"));
-        if (first) DEBUG_INFO(DEBUG_CATEGORY_STREAM, "desktop first frame id=%llu %dx%d", (unsigned long long)p.id,
-                              image.width(), image.height());
+        if (first) DEBUG_INFO(DEBUG_CATEGORY_STREAM, "desktop first frame id=%llu %dx%d RGB_stride=%lld",
+                              (unsigned long long)p.id, image.width(), image.height(), (long long)image.bytesPerLine());
         emit framePresented();
     }
     if (finished) { m_status->setText(text("Stream ended")); m_audio.close(); m_timer.stop(); }
@@ -284,7 +285,7 @@ void StreamPlayerWindow::decode() {
               if (pts < p.clock(nowUs()) - 100000) { discarded++; continue; } }
             converter = sws_getCachedContext(converter, frame->width, frame->height, (AVPixelFormat)frame->format,
                 frame->width, frame->height, AV_PIX_FMT_RGB24, SWS_BILINEAR, nullptr, nullptr, nullptr);
-            QImage image(frame->width, frame->height, QImage::Format_RGB888);
+            QImage image = video_frame_image(frame->width, frame->height);
             if (!converter || image.isNull()) { fail(text("Stream video conversion failed")); p.running = false; return; }
             uint8_t* destination[] = {image.bits(), nullptr, nullptr, nullptr};
             int strides[] = {(int)image.bytesPerLine(), 0, 0, 0};
diff --git a/tools/chatgui/src/video_frame_image.h b/tools/chatgui/src/video_frame_image.h
new file mode 100644
index 00000000..007b1cff
--- /dev/null
+++ b/tools/chatgui/src/video_frame_image.h
@@ -0,0 +1,33 @@
+/* RGB888 для sws_scale: FFmpeg выделяет выровненные строки и запас для SIMD.
+ * QImage разделяет буфер без копирования; последний владелец освобождает AVFrame. */
+#pragma once
+
+#ifdef HAVE_FFMPEG
+#include <QImage>
+#include "debug_config.h"
+extern "C" {
+#include <libavutil/frame.h>
+}
+
+inline QImage video_frame_image(int width, int height) {
+    AVFrame* frame = av_frame_alloc();
+    if (!frame) {
+        DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "video RGB frame allocation failed size=%dx%d", width, height); return {};
+    }
+    frame->format = AV_PIX_FMT_RGB24; frame->width = width; frame->height = height;
+    int result = av_frame_get_buffer(frame, 32);
+    if (result < 0) {
+        DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "video RGB buffer allocation failed size=%dx%d result=%d", width, height, result);
+        av_frame_free(&frame); return {};
+    }
+    QImage image(frame->data[0], width, height, frame->linesize[0], QImage::Format_RGB888, [](void* owner) {
+        auto* frame = static_cast<AVFrame*>(owner); av_frame_free(&frame);
+    }, frame);
+    if (image.isNull()) {
+        DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "video RGB image initialization failed size=%dx%d stride=%d", width, height, frame->linesize[0]);
+        av_frame_free(&frame); return {};
+    }
+    DEBUG_TRACE(DEBUG_CATEGORY_VIDEO, "video RGB buffer allocated size=%dx%d stride=%d alignment=32", width, height, frame->linesize[0]);
+    return image;
+}
+#endif