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Video Downloader `youtube-dl` Gets Support For Separate Audio And Video YouTube DASH Streams

YouTube uses Dynamic Adaptive Streaming over HTTP (DASH) for delivering videos and along with that, it serves the audio and video in two separate streams for some resolutions/formats. For instance, resolutions like 1080p and 480p are available only with separate audio and video streams.youtube-dl, a popular command line tool for downloading videos from YouTube and other similar websites, was updated recently with proper support for DASH and separate audio and video streams: the tool can now automatically combine / merge / multiplex the audio and video formats offered by YouTube.Here’s an example via cynic.cc for downloading separate audio and video streams from YouTube and combining them automatically using youtube-dl (which uses ffmpeg or avconv under the hood):”Now, if you want a 480p video in H.264 format, High profile, with 128kbps AAC audio (this used to be Youtube’s format 35), you can specify format -f 135+140 on the command-line and it will download both the audio, the video and multiplex it with ffmpeg (or avconv, depending on what you have installed).”And that’s not all, a lot of other improvements and fixes are added daily to this command line download tool.For instance, since our previous article about youtube-dl, the downloader received support

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