void Update()
{
var camera = GetComponent <Camera>();
// Lazy initialization
if (_session == null)
{
// Give a newly created temporary render texture to the camera
// if it's set to render to a screen. Also create a blitter
// object to keep frames presented on the screen.
if (camera.targetTexture == null)
{
_tempRT = new RenderTexture(_width, _height, 24, GetTargetFormat(camera));
_tempRT.antiAliasing = GetAntiAliasingLevel(camera);
camera.targetTexture = _tempRT;
_blitter = Blitter.CreateInstance(camera);
}
// Start an FFmpeg session.
_session = FFmpegSession.Create(
gameObject.name,
camera.targetTexture.width,
camera.targetTexture.height,
_frameRate, preset
);
_startTime = Time.time;
_frameCount = 0;
_frameDropCount = 0;
}
var gap = Time.time - FrameTime;
var delta = 1 / _frameRate;
if (gap < 0)
{
// Update without frame data.
_session.PushFrame(null);
}
else if (gap < delta)
{
// Single-frame behind from the current time:
// Push the current frame to FFmpeg.
_session.PushFrame(camera.targetTexture);
_frameCount++;
}
else if (gap < delta * 2)
{
// Two-frame behind from the current time:
// Push the current frame twice to FFmpeg. Actually this is not
// an efficient way to catch up. We should think about
// implementing frame duplication in a more proper way. #fixme
_session.PushFrame(camera.targetTexture);
_session.PushFrame(camera.targetTexture);
_frameCount += 2;
}
else
{
// Show a warning message about the situation.
WarnFrameDrop();
// Push the current frame to FFmpeg.
_session.PushFrame(camera.targetTexture);
// Compensate the time delay.
_frameCount += Mathf.FloorToInt(gap * _frameRate);
}
}
void Update()
{
var camera = GetComponent <Camera>();
// Lazy initialization
if (_session == null)
{
// Give a newly created temporary render texture to the camera
// if it's set to render to a screen. Also create a blitter
// object to keep frames presented on the screen.
if (camera.targetTexture == null)
{
_tempRT = new RenderTexture(_width, _height, 24, GetTargetFormat(camera));
_tempRT.antiAliasing = GetAntiAliasingLevel(camera);
camera.targetTexture = _tempRT;
_blitter = Blitter.CreateInstance(camera);
}
// Start an FFmpeg session.
var targetTexture = camera.targetTexture;
if (_isStream)
{
_session = FFmpegSession.CreateWithArguments(
"-re"
+ " -y -f rawvideo -vcodec rawvideo -pixel_format rgba"
+ " -colorspace bt709"
+ " -video_size " + targetTexture.width + "x" + targetTexture.height
+ " -framerate " + _frameRate
+ " -loglevel warning -i - " + preset.GetOptions()
+ " -preset " + _compressionSpeed.ToString().ToLower() // compression preset
+ $" -b:v {_bitrate}k -maxrate {_bitrate}k -bufsize {_bitrate * 2}k" // Video bitrates
+ $" -f flv \"{_rtmpUrl}\""
);
}
else
{
_session = FFmpegSession.Create(
gameObject.name,
targetTexture.width,
targetTexture.height,
_frameRate, preset
);
}
_startTime = Time.time;
_frameCount = 0;
_frameDropCount = 0;
}
var gap = Time.time - FrameTime;
var delta = 1 / _frameRate;
if (gap < 0)
{
// Update without frame data.
_session.PushFrame(null);
}
else if (gap < delta)
{
// Single-frame behind from the current time:
// Push the current frame to FFmpeg.
_session.PushFrame(camera.targetTexture);
_frameCount++;
}
else if (gap < delta * 2)
{
// Two-frame behind from the current time:
// Push the current frame twice to FFmpeg. Actually this is not
// an efficient way to catch up. We should think about
// implementing frame duplication in a more proper way. #fixme
_session.PushFrame(camera.targetTexture);
_session.PushFrame(camera.targetTexture);
_frameCount += 2;
}
else
{
// Show a warning message about the situation.
WarnFrameDrop();
// Push the current frame to FFmpeg.
_session.PushFrame(camera.targetTexture);
// Compensate the time delay.
_frameCount += Mathf.FloorToInt(gap * _frameRate);
}
}