Setting up ffmpeg windows download#

You will need to wait about 10 seconds to 1 minute depending on the speed of your processor To encode the file Copy and paste the command above in the command prompt and press ENTER. To do that we use the following command:ДЇfmpeg -i input.avi -c:a aac -b:a 128k -vn input_audio_128k.mp4 That is because in DASH you want to stream audio separate from video. Notice there is no audio in any of the videos.

Optional: Repeat this again for a wide range of bitrates and resolutions (you don't need to do this, I provided all the commands you need in the next step).Change the output file to input_video_320x180_500k.mp4.Run the command again but with some of the parameters changed: In order to use DASH effectively, you need to have multiple files at different bitrates and resolutions. Having one file is fine, but that defeats the purpose of DASH. You will need to wait about 10 seconds to 5 minutes depending on the speed of your processor and the options used.Copy and paste the command above in the command prompt and press ENTER.input_video_160x90_250k.mp4 - the output file.-g 90 - tells ffmpeg we want a keyframe interval (GOP length) of 90.-b:v 250k - is the bitrate we want to encode the video to.-c:v libx264 - specifies the audio codec to use, in this case we want h264.-s 160x90 - is the resolution we want to encode our input file to.-i input.avi - tells ffmpeg where the input file is.Now we are going to use the following command to encode the video:ДЇfmpeg -i input.avi -s 160x90 -c:v libx264 -b:v 250k -g 90 -an input_video_160x90_250k.mp4 This switching is what makes DASH so important to content streaming companies like Netflix, YouTube, and others because it saves bandwidth and thus money!

Setting up ffmpeg windows download#

Here you are going to write the commands to transform the input video into multiple bitrates and resolutions, so a DASH video player can switch between bitrates depending on the current download speed of the playback device.