/// <summary>
/// Initializes a new instance of the <see cref="StreamInfo"/> class.
/// </summary>
/// <param name="stream">The video stream.</param>
/// <param name="container">The input container.</param>
internal unsafe StreamInfo(AVStream *stream, InputContainer container)
{
var codec = stream->codec;
Metadata = new ReadOnlyDictionary <string, string>(FFDictionary.ToDictionary(stream->metadata));
CodecName = ffmpeg.avcodec_get_name(codec->codec_id);
CodecId = codec->codec_id.FormatEnum(12);
Index = stream->index;
IsInterlaced = codec->field_order != AVFieldOrder.AV_FIELD_PROGRESSIVE &&
codec->field_order != AVFieldOrder.AV_FIELD_UNKNOWN;
FrameSize = new Size(codec->width, codec->height);
PixelFormat = codec->pix_fmt.FormatEnum(11);
AVPixelFormat = codec->pix_fmt;
TimeBase = stream->time_base;
RealFrameRate = stream->r_frame_rate;
AvgFrameRate = stream->avg_frame_rate.ToDouble();
IsVariableFrameRate = RealFrameRate.ToDouble() != AvgFrameRate;
Duration = stream->duration >= 0
? stream->duration.ToTimeSpan(stream->time_base)
: TimeSpan.FromTicks(container.Pointer->duration * 10);
var start = stream->start_time.ToTimeSpan(stream->time_base);
StartTime = start == TimeSpan.MinValue ? TimeSpan.Zero : start;
if (stream->nb_frames > 0)
{
IsFrameCountProvidedByContainer = true;
FrameCount = (int)stream->nb_frames;
}
else
{
FrameCount = Duration.ToFrameNumber(stream->avg_frame_rate);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="VideoStreamInfo"/> class.
/// </summary>
/// <param name="stream">A generic stream.</param>
/// <param name="container">The input container.</param>
internal unsafe VideoStreamInfo(AVStream *stream, InputContainer container)
: base(stream, container)
{
var codec = stream->codec;
AvgFrameRate = stream->avg_frame_rate.ToDouble();
IsVariableFrameRate = RealFrameRate.ToDouble() != AvgFrameRate;
RealFrameRate = stream->r_frame_rate;
FrameSize = new Size(codec->width, codec->height);
PixelFormat = codec->pix_fmt.FormatEnum(11);
AVPixelFormat = codec->pix_fmt;
}
/// <summary>
/// Initializes a new instance of the <see cref="StreamInfo"/> class.
/// </summary>
/// <param name="stream">A generic stream.</param>
/// <param name="type">The media type of the stream.</param>
/// <param name="container">The input container.</param>
internal unsafe StreamInfo(AVStream *stream, MediaType type, InputContainer container)
{
var codec = stream->codec;
Metadata = new ReadOnlyDictionary <string, string>(FFDictionary.ToDictionary(stream->metadata));
CodecName = ffmpeg.avcodec_get_name(codec->codec_id);
CodecId = codec->codec_id.FormatEnum(12);
Index = stream->index;
Type = type;
TimeBase = stream->time_base;
RealFrameRate = stream->r_frame_rate;
AvgFrameRate = stream->avg_frame_rate.ToDouble();
IsVariableFrameRate = RealFrameRate.ToDouble() != AvgFrameRate;
if (stream->duration >= 0)
{
Duration = stream->duration.ToTimeSpan(stream->time_base);
DurationRaw = stream->duration;
}
else
{
Duration = TimeSpan.FromTicks(container.Pointer->duration * 10);
DurationRaw = Duration.ToTimestamp(TimeBase);
}
if (stream->start_time >= 0)
{
StartTime = stream->start_time.ToTimeSpan(stream->time_base);
}
if (stream->nb_frames > 0)
{
IsFrameCountProvidedByContainer = true;
NumberOfFrames = (int)stream->nb_frames;
FrameCount = NumberOfFrames.Value;
}
else
{
FrameCount = Duration.ToFrameNumber(stream->avg_frame_rate);
if (!IsVariableFrameRate)
{
NumberOfFrames = FrameCount;
}
else
{
NumberOfFrames = null;
}
}
}
