public MediaWriter AddEncoder(Encoder encoder)
{
if (readyEncoders != null)
{
throw new InvalidOperationException($"该{nameof(MediaWriter)}对象已经初始化");
}
if (outputFormat == null)
{
var desc = FF.avcodec_descriptor_get(encoder.ID);
if (desc == null)
{
throw new InvalidOperationException("无法获得编码器的短名称描述");
}
outputFormat = FF.av_guess_format(desc->Name, null, null);
if (outputFormat == null)
{
throw new InvalidOperationException("无法确定媒体的输出格式");
}
formatContext->Oformat = outputFormat;
}
var stream = FF.avformat_new_stream(formatContext, encoder.codec);
if (stream == null)
{
throw new InvalidOperationException("无法创建流");
}
// stream->TimeBase = encoder.codecContext->TimeBase;
int result = FF.avcodec_parameters_from_context(stream->Codecpar, encoder.codecContext);
if (result < 0)
{
throw new FFmpegException(result);
}
encoder.stream = stream;
encoders.Add(encoder);
return(this);
}
