コード例 #1
0
ファイル: VideoWriter.cs プロジェクト: Dryadepy/CSVideo
 public VideoWriter(string filename)
 {
     Filename    = filename;
     videoStream = new OutputStream();
     audioStream = new OutputStream();
 }
コード例 #2
0
ファイル: VideoWriter.cs プロジェクト: Dryadepy/CSVideo
        private void AddStream(ref OutputStream stream, ref AVCodec *codec, AVCodecID codecId)
        {
            AVCodecContext *c;

            codec = avcodec_find_encoder(codecId);
            if (codec == null)
            {
                throw new NotSupportedException("No encoder for codec " + avcodec_get_name(codecId));
            }

            stream.st = avformat_new_stream(ctx, null);
            if (stream.st == null)
            {
                throw new FFmpegException("Could not allocate stream");
            }

            stream.st->id = (int)(ctx->nb_streams - 1);

            c = avcodec_alloc_context3(codec);
            if (c == null)
            {
                throw new FFmpegException("Could not allocate encoding context");
            }
            stream.enc = c;

            if (codec->type == AVMediaType.AVMEDIA_TYPE_AUDIO)
            {
                c->sample_fmt     = codec->sample_fmts != null ? codec->sample_fmts[0] : AVSampleFormat.AV_SAMPLE_FMT_FLTP;
                c->bit_rate       = AudioBitrate;
                c->sample_rate    = AudioSampleRate;
                c->channels       = av_get_channel_layout_nb_channels(c->channel_layout);
                c->channel_layout = AV_CH_LAYOUT_STEREO;
                if (codec->channel_layouts != null)
                {
                    c->channel_layout = codec->channel_layouts[0];
                    for (int i = 0; codec->channel_layouts[i] != 0; i++)
                    {
                        if (codec->channel_layouts[i] == AV_CH_LAYOUT_STEREO)
                        {
                            c->channel_layout = AV_CH_LAYOUT_STEREO;
                        }
                    }
                }
                c->channels          = av_get_channel_layout_nb_channels(c->channel_layout);
                stream.st->time_base = new AVRational()
                {
                    num = 1, den = c->sample_rate
                };
            }
            else if (codec->type == AVMediaType.AVMEDIA_TYPE_VIDEO)
            {
                c->codec_id          = codecId;
                c->bit_rate          = VideoBitrate;
                c->width             = Width;
                c->height            = Height;
                stream.st->time_base = new AVRational()
                {
                    num = 1, den = Fps
                };
                c->time_base = stream.st->time_base;
                c->gop_size  = 12;
                c->pix_fmt   = AVPixelFormat.AV_PIX_FMT_YUV420P;

                if (c->codec_id == AVCodecID.AV_CODEC_ID_MPEG1VIDEO)
                {
                    c->mb_decision = 2;
                }
            }

            if ((ctx->oformat->flags & AVFMT_GLOBALHEADER) != 0)
            {
                c->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
            }
        }