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Encoders play a very important role in this process.īroadcasters have a lot of choices when it comes to configuring their encoder settings. Many types of technology come together to deliver high-quality videos that capture events as they unfold in real-time. Once you have edited your fetch.bat file save it and now double-click it, you will now see the command line and FFmpeg go through the process of downloading and encoding your media file.There is a lot that goes on behind the scenes of live streaming.

The slowest but best compression rate ffmpeg -i "" -c:v libx264 -preset veryslow -crf 21 downloadedfile.mp4 The quickest encode ffmpeg -i "" -c:v libx264 -preset ultrafast -crf 22 downloadedfile.mp4 Here is a nice graph to see roughly what the time to quality would be like at different values.

A -crf of around 18-21 is the sweet spot i have found.Ī good solid combination i find to make the file slightly smaller, keep quality and do it quickly is the values used here ffmpeg -i "" -c:v libx264 -preset fast -crf 19 downloadedfile.mp4 The range of the CRF scale is 0–51, 0 is lossless, 23 is the default, and 51 is the worst quality possible. 0 is lossless meaning it wont encode it or change its quality, FFmpeg say an output that is roughly “visually lossless” but not technically lossless is -crf 17 or -crf 18 The -crf is constant rate factor or quality control on the video. A slow -preset will take longer but compress the file better. This will download videofile.mp4 and will use a fast encoding to compression speed, so the file will be quiet large but it will encode it quickly. Here you can see we are fetching/downloading the videolink.mp4 file and saving (copying) it as downloadedfile.mp4 ffmpeg -i "" -c:v libx264 -preset fast -crf 18 downloadedfile.mp4 Will return all kinds of information about the media file such as bitrate, fps, encoded type, subtitles info, audio info, channels and more. Now comes the fun, the basics of FFmpeg is as follows ffmpeg -i "" Next create a new text file and rename it something like fetch.bat so it’s now the bat extension rather than text. I am going to cater this guide towards windows users, once you have downloaded the FFmpeg.zip open it and drag the 3 files from the bin folder into C:\Users\YOURUSERNAME\Īnd make sure the files are unblocked by right clicking and going to properties and ticking UNBLOCK at the bottom of the details tab. I find it very good at downloading streams (m3u8 and ts files).

FFmpeg is a very simple way to download, convert and stream media (video and audio).