public MediaWriter AddVideo(VideoFormat format, VideoEncoderParameters encoderParams = null)
{
if (readyEncoders != null)
{
throw new InvalidOperationException($"该{nameof(MediaWriter)}对象已经初始化");
}
if (outputFormat == null)
{
throw new InvalidOperationException("无法确定媒体的输出格式");
}
if (outputFormat->VideoCodec == AVCodecID.None)
{
throw new InvalidOperationException($"该{nameof(MediaWriter)}对象并不支持视频");
}
var stream = FF.avformat_new_stream(formatContext, Codec.GetEncoder(outputFormat->VideoCodec));
if (stream == null)
{
throw new InvalidOperationException("无法创建流");
}
var codecContext = stream->Codec;
var videoEncoder = new VideoEncoder(stream, format, encoderParams);
stream->TimeBase = codecContext->TimeBase;
stream->AvgFrameRate = codecContext->Framerate;
int result = FF.avcodec_parameters_from_context(stream->Codecpar, codecContext);
if (result < 0)
{
throw new FFmpegException(result);
}
encoders.Add(videoEncoder);
return(this);
}
public void Resize(VideoFormat format)
{
this.format = format;
Resize();
}
public VideoFrame(VideoFormat format)
{
this.format = format;
Resize();
}
public VideoDecoder(AVStream *stream) : base(stream)
{
InFormat = new VideoFormat(codecContext->Width, codecContext->Height, codecContext->PixFmt);
}
