Emil_Shanaty/Cortex_Engine
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fix: video recording captures every frame + dynamic FPS for FFmpeg

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- Removed skipFrames logic — capture every frame for reliability
- FFmpeg framerate set to actual FPS (capped at 60) instead of hardcoded 30
- Added -vf fps=30 filter to downsample to 30fps in output
- First frame: CapturedFrame is null (no previous capture), skipped naturally
- Second frame onwards: data available from previous frame's GPU copy
This commit is contained in:
emil28092005
2026-06-19 09:01:55 +03:00
parent ab1a2d05c3
commit 00b6f39201
2 changed files with 15 additions and 19 deletions
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Videos/cortex_20260619_090013.mp4
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src/CortexEngine.App/Program.cs
+15 -19
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@@ -328,7 +328,8 @@ class Program
var w = window.Width; var w = window.Width;
var h = window.Height; var h = window.Height;
var ffmpegArgs = $"-y -f rawvideo -pixel_format rgba -video_size {w}x{h} -framerate 30 -i - -c:v libx264 -preset fast -crf 23 -pix_fmt yuv420p {recordingPath}"; var fps = (int)Math.Round(1000.0 / timing.DeltaTime);
var ffmpegArgs = $"-y -f rawvideo -pixel_format rgba -video_size {w}x{h} -framerate {Math.Min(fps, 60)} -i - -c:v libx264 -preset fast -crf 23 -pix_fmt yuv420p -vf fps=30 {recordingPath}";
var psi = new ProcessStartInfo var psi = new ProcessStartInfo
{ {
@@ -388,30 +389,25 @@ class Program
renderer.RenderWorld(world); renderer.RenderWorld(world);
queue.CompletePendingScreenshots(); queue.CompletePendingScreenshots();
// If recording, get captured frame and write to FFmpeg // If recording, get captured frame and write to FFmpeg
if (isRecording && ffmpegProcess != null && !ffmpegProcess.HasExited) if (isRecording && ffmpegProcess != null && !ffmpegProcess.HasExited)
{ {
skipFrames++; var frameData = vkRenderer.CapturedFrame;
if (skipFrames >= 2) // Capture every 2nd frame for 30fps at ~60fps if (frameData != null && frameData.Length > 0)
{ {
skipFrames = 0; try
var frameData = vkRenderer.CapturedFrame;
if (frameData != null && frameData.Length > 0)
{ {
try ffmpegProcess.StandardInput.BaseStream.Write(frameData, 0, frameData.Length);
{ ffmpegProcess.StandardInput.BaseStream.Flush();
ffmpegProcess.StandardInput.BaseStream.Write(frameData, 0, frameData.Length); recordedFrames++;
ffmpegProcess.StandardInput.BaseStream.Flush();
recordedFrames++;
}
catch (Exception ex)
{
Console.WriteLine($"[App] FFmpeg write error: {ex.Message}");
isRecording = false;
}
} }
} } catch (Exception ex)
{
Console.WriteLine($"[App] FFmpeg write error: {ex.Message}");
isRecording = false;
}
}
}
frames++; frames++;
if (timing.TotalTime - lastFpsTime >= 1.0) if (timing.TotalTime - lastFpsTime >= 1.0)