コード例 #1
0
        public string GetFFmpegArgs(bool isCustom = false)
        {
            if (!FFmpeg.IsVideoSourceSelected && !FFmpeg.IsAudioSourceSelected)
            {
                return(null);
            }

            StringBuilder args = new StringBuilder();

            args.Append("-y ");              // -y for overwrite file
            args.Append("-rtbufsize 100M "); // default real time buffer size was 3041280 (3M)

            string fps;

            if (isCustom)
            {
                fps = "$fps$";
            }
            else
            {
                fps = FFmpeg.VideoCodec == FFmpegVideoCodec.gif ? Giffps.ToString() : ScreenRecordFps.ToString();
            }

            if (FFmpeg.IsVideoSourceSelected)
            {
                if (FFmpeg.VideoSource.Equals(FFmpegHelper.SourceGdiGrab, StringComparison.InvariantCultureIgnoreCase))
                {
                    // http://ffmpeg.org/ffmpeg-devices.html#gdigrab
                    args.AppendFormat("-f gdigrab -framerate {0} -offset_x {1} -offset_y {2} -video_size {3}x{4} -draw_mouse {5} -i desktop ",
                                      fps, isCustom ? "$area_x$" : CaptureArea.X.ToString(), isCustom ? "$area_y$" : CaptureArea.Y.ToString(),
                                      isCustom ? "$area_width$" : CaptureArea.Width.ToString(), isCustom ? "$area_height$" : CaptureArea.Height.ToString(),
                                      isCustom ? "$cursor$" : DrawCursor ? "1" : "0");

                    if (FFmpeg.IsAudioSourceSelected)
                    {
                        args.AppendFormat("-f dshow -i audio=\"{0}\" ", FFmpeg.AudioSource);
                    }
                }
                else
                {
                    args.AppendFormat("-f dshow -framerate {0} -i video=\"{1}\"", fps, FFmpeg.VideoSource);

                    if (FFmpeg.IsAudioSourceSelected)
                    {
                        args.AppendFormat(":audio=\"{0}\" ", FFmpeg.AudioSource);
                    }
                    else
                    {
                        args.Append(" ");
                    }
                }
            }
            else if (FFmpeg.IsAudioSourceSelected)
            {
                args.AppendFormat("-f dshow -i audio=\"{0}\" ", FFmpeg.AudioSource);
            }

            if (!string.IsNullOrEmpty(FFmpeg.UserArgs))
            {
                args.Append(FFmpeg.UserArgs + " ");
            }

            if (FFmpeg.IsVideoSourceSelected)
            {
                string videoCodec;

                switch (FFmpeg.VideoCodec)
                {
                default:
                    videoCodec = FFmpeg.VideoCodec.ToString();
                    break;

                case FFmpegVideoCodec.gif:
                    videoCodec = FFmpegVideoCodec.libx264.ToString();
                    break;
                }

                args.AppendFormat("-c:v {0} ", videoCodec);
                args.AppendFormat("-r {0} ", fps); // output FPS

                switch (FFmpeg.VideoCodec)
                {
                case FFmpegVideoCodec.libx264:     // https://trac.ffmpeg.org/wiki/Encode/H.264
                case FFmpegVideoCodec.libx265:     // https://trac.ffmpeg.org/wiki/Encode/H.265
                    args.AppendFormat("-preset {0} ", FFmpeg.X264Preset);
                    args.AppendFormat("-tune {0} ", FFmpegTune.zerolatency);
                    args.AppendFormat("-crf {0} ", FFmpeg.X264Crf);
                    args.AppendFormat("-pix_fmt {0} ", "yuv420p");     // -pix_fmt yuv420p required otherwise can't stream in Chrome
                    break;

                case FFmpegVideoCodec.libvpx:     // https://trac.ffmpeg.org/wiki/Encode/VP8
                    args.AppendFormat("-deadline {0} ", "realtime");
                    args.AppendFormat("-b:v {0}k ", FFmpeg.VPxBitrate);
                    args.AppendFormat("-pix_fmt {0} ", "yuv420p");     // -pix_fmt yuv420p required otherwise causing issues in Chrome related to WebM transparency support
                    break;

                case FFmpegVideoCodec.libxvid:     // https://trac.ffmpeg.org/wiki/Encode/MPEG-4
                    args.AppendFormat("-qscale:v {0} ", FFmpeg.XviDQscale);
                    break;

                case FFmpegVideoCodec.h264_nvenc:     // https://trac.ffmpeg.org/wiki/HWAccelIntro#NVENC
                case FFmpegVideoCodec.hevc_nvenc:
                    args.AppendFormat("-preset {0} ", FFmpeg.NvencPreset);
                    args.AppendFormat("-b:v {0}k ", FFmpeg.NvencBitrate);
                    args.AppendFormat("-pix_fmt {0} ", "yuv420p");
                    break;

                case FFmpegVideoCodec.gif:
                    args.AppendFormat("-preset {0} ", FFmpegPreset.ultrafast);
                    args.AppendFormat("-tune {0} ", FFmpegTune.zerolatency);
                    args.AppendFormat("-qp {0} ", 0);
                    break;
                }
            }

            if (FFmpeg.IsAudioSourceSelected)
            {
                switch (FFmpeg.AudioCodec)
                {
                case FFmpegAudioCodec.libvoaacenc:                                                // http://trac.ffmpeg.org/wiki/Encode/AAC
                    args.AppendFormat("-c:a aac -strict -2 -ac 2 -b:a {0}k ", FFmpeg.AacBitrate); // -ac 2 required otherwise failing with 7.1
                    break;

                case FFmpegAudioCodec.libvorbis:     // http://trac.ffmpeg.org/wiki/TheoraVorbisEncodingGuide
                    args.AppendFormat("-c:a libvorbis -qscale:a {0} ", FFmpeg.VorbisQscale);
                    break;

                case FFmpegAudioCodec.libmp3lame:     // http://trac.ffmpeg.org/wiki/Encode/MP3
                    args.AppendFormat("-c:a libmp3lame -qscale:a {0} ", FFmpeg.Mp3Qscale);
                    break;
                }
            }

            if (Duration > 0)
            {
                args.AppendFormat("-t {0} ", isCustom ? "$duration$" : Duration.ToString("0.0", CultureInfo.InvariantCulture)); // duration limit
            }

            args.AppendFormat("\"{0}\"", isCustom ? "$output$" : Path.ChangeExtension(OutputPath, FFmpeg.Extension));

            return(args.ToString());
        }
コード例 #2
0
        public string GetFFmpegCommands()
        {
            string commands;

            if (!string.IsNullOrEmpty(FFmpeg.VideoSource) && FFmpeg.VideoSource.Equals("screen-capture-recorder", StringComparison.InvariantCultureIgnoreCase))
            {
                // https://github.com/rdp/screen-capture-recorder-to-video-windows-free
                const string registryPath = "Software\\screen-capture-recorder";
                RegistryHelper.CreateRegistry(registryPath, "start_x", CaptureArea.X);
                RegistryHelper.CreateRegistry(registryPath, "start_y", CaptureArea.Y);
                RegistryHelper.CreateRegistry(registryPath, "capture_width", CaptureArea.Width);
                RegistryHelper.CreateRegistry(registryPath, "capture_height", CaptureArea.Height);
                RegistryHelper.CreateRegistry(registryPath, "default_max_fps", Giffps); //GIF FPS used for ScreenRecordFPS
                RegistryHelper.CreateRegistry(registryPath, "capture_mouse_default_1", DrawCursor ? 1 : 0);
            }

            if (FFmpeg.UseCustomCommands && !string.IsNullOrEmpty(FFmpeg.CustomCommands))
            {
                commands = FFmpeg.CustomCommands.
                           Replace("$fps$", FFmpeg.VideoCodec == FFmpegVideoCodec.gif ? Giffps.ToString() : ScreenRecordFps.ToString(), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$area_x$", CaptureArea.X.ToString(), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$area_y$", CaptureArea.Y.ToString(), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$area_width$", CaptureArea.Width.ToString(), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$area_height$", CaptureArea.Height.ToString(), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$cursor$", DrawCursor ? "1" : "0", StringComparison.InvariantCultureIgnoreCase).
                           Replace("$duration$", Duration.ToString("0.0", CultureInfo.InvariantCulture), StringComparison.InvariantCultureIgnoreCase).
                           Replace("$output$", Path.ChangeExtension(OutputPath, FFmpeg.Extension), StringComparison.InvariantCultureIgnoreCase);
            }
            else
            {
                commands = GetFFmpegArgs();
            }

            return(commands.Trim());
        }