Exemplo n.º 1
0
        /// <summary>
        /// postprocesses an audio job followed by a video job
        /// this constellation happens in automated or one click encoding where we have an audio job linked
        /// to a video job
        /// first, any audio jobs previous to the audio job in question will be located
        /// then we get the size of all audio tracks
        /// from the desired final output size stored in the first video job, we calculate the video bitrate
        /// we have to use to obtain the final file size, taking container overhead into account
        /// the calculated bitrate is then applied to all video jobs
        /// </summary>
        /// <param name="firstAudio">the audio job that is linked to a video job</param>
        /// <param name="firstpass">the video job to which the audio job is linked</param>
        public static LogItem calculateBitrate(MainForm mainForm, Job ajob)
        {
            if (!(ajob is VideoJob))
            {
                return(null);
            }
            VideoJob job = (VideoJob)ajob;

            if (job.BitrateCalculationInfo == null)
            {
                return(null);
            }

            BitrateCalculationInfo b = job.BitrateCalculationInfo;
            LogItem log = new LogItem("Bitrate calculation for video");

            List <AudioBitrateCalculationStream> audioStreams = new List <AudioBitrateCalculationStream>();

            foreach (string s in b.AudioFiles)
            {
                audioStreams.Add(new AudioBitrateCalculationStream(s));
            }

            double framerate;
            ulong  framecount;

            JobUtil.getInputProperties(out framecount, out framerate, job.Input);

            int   bitrateKBits;
            ulong videoSizeKB = 0;

            try
            {
                bitrateKBits = BitrateCalculator.CalculateBitrateKBits(job.Settings.Codec, job.Settings.NbBframes > 0, b.Container,
                                                                       audioStreams.ToArray(), b.DesiredSize.Bytes, framecount, framerate, out videoSizeKB);
            }
            catch (CalculationException e)
            {
                log.LogValue("Calculation failed", e, ImageType.Error);
                return(log);
            }

            log.LogValue("Desired size after subtracting audio", videoSizeKB + "KBs");
            log.LogValue("Calculated desired bitrate", bitrateKBits + "kbit/s");

            foreach (TaggedJob t in b.VideoJobs)
            {
                ((VideoJob)t.Job).Settings.BitrateQuantizer = bitrateKBits;
            }

            return(log);
        }
Exemplo n.º 2
0
        /// <summary>
        /// postprocesses an audio job followed by a video job
        /// this constellation happens in automated or one click encoding where we have an audio job linked
        /// to a video job
        /// first, any audio jobs previous to the audio job in question will be located
        /// then we get the size of all audio tracks
        /// from the desired final output size stored in the first video job, we calculate the video bitrate
        /// we have to use to obtain the final file size, taking container overhead into account
        /// the calculated bitrate is then applied to all video jobs
        /// </summary>
        /// <param name="firstAudio">the audio job that is linked to a video job</param>
        /// <param name="firstpass">the video job to which the audio job is linked</param>
        public static void calculateBitrate(MainForm mainForm, Job ajob)
        {
            if (!(ajob is VideoJob))
            {
                return;
            }
            VideoJob job = (VideoJob)ajob;

            if (job.BitrateCalculationInfo == null)
            {
                return;
            }

            BitrateCalculationInfo b = job.BitrateCalculationInfo;

            mainForm.addToLog("Doing bitrate calculation...");

            List <AudioBitrateCalculationStream> audioStreams = new List <AudioBitrateCalculationStream>();

            foreach (string s in b.AudioFiles)
            {
                audioStreams.Add(new AudioBitrateCalculationStream(s));
            }

            double framerate;
            ulong  framecount;

            JobUtil.getInputProperties(out framecount, out framerate, job.Input);

            int   bitrateKBits;
            ulong videoSizeKB = 0;

            try
            {
                bitrateKBits = BitrateCalculator.CalculateBitrateKBits(job.Settings.Codec, job.Settings.NbBframes > 0, b.Container,
                                                                       audioStreams.ToArray(), b.DesiredSize.Bytes, framecount, framerate, out videoSizeKB);
            }
            catch (CalculationException e)
            {
                mainForm.addToLog("Calculation failed with message '{0}'", e);
                return;
            }

            mainForm.addToLog("Desired video size after subtracting audio size is {0}KBs. Setting the desired bitrate of the subsequent video jobs to {1} kbit/s.",
                              videoSizeKB, bitrateKBits);

            foreach (TaggedJob t in b.VideoJobs)
            {
                ((VideoJob)t.Job).Settings.BitrateQuantizer = bitrateKBits;
            }
        }