Take timed thumbnail snapshots of a transcoded stream.

Disconnect clients after a specified time period.

Resolve edge server stream requests to origin servers.

Upload recorded media to an Amazon S3 bucket.

Control access to your application by checking referer domain.

Control which streams get packetized for HTTP streaming.

Store SMIL files and VOD assets in different locations.

Access content locally before trying a remote source.

Loop a pre-roll until a live stream starts.

Limit the number of viewers of a stream.

Control Stream class streams dynamically.

Control which streams get recorded by the nDVR recorder.

Duplicate streams to another application instance.

Filter audio-only rendition in Apple HLS auto-generated multi-bitrate playlist.

Mix audio and video from different live sources.

Send connection and stream statistics to Google Analytics.

Validate Akamai server connections with Akamai G2O authorization.

Add an audio track to a video-only stream.

Our filter will like below in dot notation: We will use filter graph to achieve this. Below example assumes that input video has greater

Finally, we overlay the original video on top of it. We then scale this part to 'fill' the viewport. So, a better solution would be to first crop the part of the video which will be visible in the output. We don't need to blur the pixels which we definitely know that will be out of viewport in the output video.

The accepted answer here takes forever to execute because it is doing so much unnecessary computation.

Ffmpeg scale letterbox