Ffmpeg crop and resize11/11/2022 ![]() ![]() *** To avoid overwhelming the user with the number of recording parameters available, provide a checkbutton on the GUI to only show the video-audio-other parameters if the user requests to see them. *** Provide an entry widget to allow the user to specify a movie-player program with which to play either the input or the output media file. ![]() *** Provide a 'ExecOption' button to start the execution of the option that the user selected from the listbox. Provide working defaults for the parameters. #FFMPEG CROP AND RESIZE MOVIE#*** Provide entry widgets for the approximately 8-plus parameters that can be specified to 'ffmpeg' to specify the container-video-audio parameters for creating the output movie file. Also provide PROPERTIES-IN and PROPERTIES-OUT options to query the properties of the input and output files - after they have been selected and created, respectively. *** Provide a listbox widget by which to select the edit operation to be performed - CLIP, CROP, CONVERT, etc. *** Provide entry widgets for an input movie file and an output media file - along with a 'Browse' button to easily select the input file. My goals for the Tcl-Tk script for this GUI were: Such a movie-editing utility (a front-end for the 'ffmpeg' command) is the subject of this page. I had mentioned on these pages that I planned to work on at least one other 'front end' for 'ffmpeg' - for example, for clipping, cropping, audio-extraction, audio-addition, and some other movie file editing functions. Movie Capture from Computer Webcam-and-Audio - a front-end for the 'ffmpeg' command Movie Capture from Computer Monitor-and-Audio - a front-end for the 'ffmpeg' command from a WEB CAM and the audio system of a computer.from a COMPUTER MONITOR and the audio system of a computer.Using our specialized /video/adaptive Robot instead.I recently (2014may,jun) published 2 utilities for recording a movie This Robot used to support HLS parameters, but we now recommend Valid values are between 0 (invisible) and The value from watermark_size is used for the percentage area Its height would appear stretched, because keeping theĪspect ratio in mind it would be resized to 200×150 pixels instead.įor the "area" resize strategy, the watermark is resized (keeping itsĪspect ratio in check) so that it covers "xx%" of the video's surfaceĪrea. Since our video isĨ00×800 pixels, for a watermark size of 25% the watermark would be resized (meaning, it is resized without keeping its aspect ratio in mind) so thatīoth sides take up 25% of the corresponding video side. Would be resized to 400×300 pixels (so just left at its original size).įor the "stretch" resize strategy, the watermark image is stretched If the watermark_size was set to "50%"", it So with our watermark, the width is the longer side, andĢ5% of the video size would be 200px. Longer side of the watermark takes up 25% of the corresponding video side.Īnd the other side is scaled according to the aspect ratio of the Let'sĪlso assume, the watermark_size parameter is set to "25%".įor the "fit" resize strategy, the watermark is scaled so that the Size is 800×800 pixels and our watermark image is 400×300 pixels. To explain how the resize strategies work, let's assume our target video You can also also pass both the video and the watermark image to an Assembly Step via the use parameter, allowing you to have both be part of the upload, or to use the results of other Assembly Steps as input to your /video/encode Step.įor this to work, you just need to use the as-syntax: "my_video_step": ",Īvailable values are "fit", "stretch" and "area". Supplying the watermark via an Assembly Step Surround a video with a frame if you cut out a transparent center from your image. With watermarking you can add an image to a video. The /video/encode Robot encodes, resizes, applies watermarks to videos and animated GIFs. ![]()
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