After that, it cheks the resulting framerate and it decides whether it has to apply a speed-up + pitch adjustment (23.976fps -> 25), or if it has to leave it as it is 'cause it's 25fps progressive or if it has to blend everything to 50fps progressive and then divide in fields or just divide everything in fields 'cause it's already 50fps progressive. Then, it applies loudness correction by making sure that it's 48'000Hz, 24bit and that the loudness is -24LUFS, then it checks for interlacing and it decides whether it has to deinterlace or not and eventually use bob-deinterlacing using yadif and so on. The workflow starts with a watchfolder, then it starts indexing audio and video using FFMpegSource2, then it checks for the number of audio channels and basically always makes 8 channels (i.e if the original file has 1 ch, it duplicates it to all the 8 channels, if it has 2 audio channels, it duplicates left and right to the 8 channels and so on). Let's take a look at the Avisynth_in workflow which is meant to encode files in MPEG-2 XDCAM with the following specifications: It might seem a bit messy, but it's actually pretty clear. This is how the user interface of one of my main workflows looks like. Today I'm gonna talk about it and the power of open source, as I think that many broadcasters and production houses are paying a lot of money for softwares like Telestream Vantage, Harmonics ProCoder, Adobe Media Encoder, Selenio, AWS Transcoder and similar while Avisynth, ffmpeg and x264 can deliver better results and are also free. Since then, I've started creating a few batch scripts and Avisynth scripts to automatize some common things based on the characteristics of every file, but then I came across a project that Steinar Apalnes was working on called FFAStrans and I switched to it. I've been using Avisynth for years, but ever since 2016 we needed to automatize our workflows a lot as we had to encode too many files and we didn't have enough encoders, so manually encoding each and every raw file wasn't an option anymore.
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