public static float FindNextKeyFrameTimeSeconds(float seconds, float frameRate, int keyFrameInterval)
{
int currentFrame = Helper.ConvertTimeSecondsToFrame(seconds, frameRate);
// TODO: allow specifying a minimum number of frames so that if currentFrame is too close to nextKeyFrame, it will calculate the next-next keyframe
int nextKeyFrame = keyFrameInterval * Mathf.CeilToInt((float)(currentFrame + 1) / (float)keyFrameInterval);
return(Helper.ConvertFrameToTimeSeconds(nextKeyFrame, frameRate));
}
/// <inheritdoc/>
public int GetDurationFrames(float overrideFrameRate = 0f)
{
int result = 0;
float frameRate = (overrideFrameRate > 0f)?overrideFrameRate:GetVideoFrameRate();
if (frameRate > 0f)
{
result = Helper.ConvertTimeSecondsToFrame(GetDuration(), frameRate);
}
return(result);
}
/// <inheritdoc/>
public int GetCurrentTimeFrames(float overrideFrameRate = 0f)
{
int result = 0;
float frameRate = (overrideFrameRate > 0f)?overrideFrameRate:GetVideoFrameRate();
if (frameRate > 0f)
{
result = Helper.ConvertTimeSecondsToFrame(GetCurrentTime(), frameRate);
result = Mathf.Min(result, GetMaxFrameNumber());
}
return(result);
}
/// <inheritdoc/>
public void SeekToFrameRelative(int frameOffset, float overrideFrameRate = 0f)
{
float frameRate = (overrideFrameRate > 0f)?overrideFrameRate:GetVideoFrameRate();
if (frameRate > 0f)
{
int frame = Helper.ConvertTimeSecondsToFrame(GetCurrentTime(), frameRate);
frame += frameOffset;
frame = Mathf.Clamp(frame, 0, GetMaxFrameNumber(frameRate));
double time = Helper.ConvertFrameToTimeSeconds(frame, frameRate);
Seek(time);
}
}