From 9b9c3d788d336d15914413788b4cf5dfceb9d3c9 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 24 Oct 2024 11:31:29 +0400
Subject: [PATCH] Skip some first frames.

---
 .../ui/controls/round_video_recorder.cpp      | 22 ++++++++++++++-----
 .../ui/controls/round_video_recorder.h        |  1 +
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp b/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
index 5c29cc65e..f58eeb2dc 100644
--- a/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
+++ b/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
@@ -35,6 +35,7 @@ constexpr auto kBlurredSize = 64;
 constexpr auto kMinithumbsPerSecond = 5;
 constexpr auto kMinithumbsInRow = 16;
 constexpr auto kFadeDuration = crl::time(150);
+constexpr auto kSkipFrames = 8;
 
 using namespace FFmpeg;
 
@@ -1317,15 +1318,23 @@ void RoundVideoRecorder::setup() {
 		}
 	}, raw->lifetime());
 
+	// Skip some frames, they are sometimes black :(
+	_skipFrames = kSkipFrames;
+	_descriptor.track->setState(Webrtc::VideoState::Active);
+
 	_descriptor.track->renderNextFrame() | rpl::start_with_next([=] {
 		const auto info = _descriptor.track->frameWithInfo(true);
 		if (!info.original.isNull() && _lastAddedIndex != info.index) {
 			_lastAddedIndex = info.index;
-			_frameOriginal = info.original;
-			const auto ts = info.mcstimestamp;
-			_private.with([copy = info.original, ts](Private &that) {
-				that.push(ts, copy);
-			});
+			if (_skipFrames > 0) {
+				--_skipFrames;
+			} else {
+				_frameOriginal = info.original;
+				const auto ts = info.mcstimestamp;
+				_private.with([copy = info.original, ts](Private &that) {
+					that.push(ts, copy);
+				});
+			}
 		}
 		_descriptor.track->markFrameShown();
 		raw->update();
@@ -1412,9 +1421,10 @@ void RoundVideoRecorder::resume(RoundVideoPartial partial) {
 	if (!_cachedPreviewFrame.image.isNull()) {
 		_fadePreviewAnimation.start(updater(), 1., 0., kFadeDuration);
 	}
+	// Skip some frames, they are sometimes black :(
+	_skipFrames = kSkipFrames;
 	_descriptor.track->setState(Webrtc::VideoState::Active);
 	_preview->update();
 }
 
 } // namespace Ui
-
diff --git a/Telegram/SourceFiles/ui/controls/round_video_recorder.h b/Telegram/SourceFiles/ui/controls/round_video_recorder.h
index 57f47b8ca..b98d313cc 100644
--- a/Telegram/SourceFiles/ui/controls/round_video_recorder.h
+++ b/Telegram/SourceFiles/ui/controls/round_video_recorder.h
@@ -120,6 +120,7 @@ private:
 	int _side = 0;
 	int _progressStroke = 0;
 	int _extent = 0;
+	int _skipFrames = 0;
 	bool _progressReceived = false;
 	bool _visible = false;
 	bool _paused = false;