(Notice the “-” symbols and the pipe symbol “|”).Slideshow videos offer a great way of taking individual photos and turning them into more meaningful and complete stories told via video. c:a aac -f matroska – | ffplay – : this will instruct FFMPEG to produce an audio in AAC format, a video in Matroska format and it will pipe the final output into an instance of FFPLAY. preset ultrafast -tune zerolatency -crf 28 -g 60: this are h264 settings suitable for streaming purposes (quality and keyframe interval) and are used here as an example. f mkv -c:v h264 -profile:v baseline -pix_fmt yuv420p: this will instruct FFMPEG to produce a Matroska file encoded in h264, and suitable for all players including Quicktime (see “ Encoding for Dumb Players“). vf drawtext="text='HELLO WORLD! %’:rate=30:x=(w-tw)/2:y=(h-lh)/2:fontsize=48:fontcolor=white:box=1:boxcolor=black”: this will overlay a test message on top of the color bars, displaying a “Hello World!” text message plus the local time of your remote server or local computer, at 30 frame-per-second, with the default font, 48px size, with a white text color on top of a black box. The code will be as follow: ffmpeg -re -f lavfi -i "smptehdbars=rate=30:size=1920x1080" \ Let’s take the following example: generate a Color Bars Test Pattern (as previously discussed in this article) and reproduce it with FFPLAY. In order to test your FFMPEG command with FFPLAY, all at once in a single command, you can use the PIPE function, namely sending the resulting output of your first command (an action performed by FFMPEG) as an input for the next instruction (to be played by FFPLAY). It can be used to make animations and video games.įFPlay is often used as a testing tool in order to verify the FFMPEG output. SDL stands for “ Simple Direct Media Layer”, meaning a cross-platform development library designed to provide low level access (access to the hardware of a computer) to audio, keyboard, mouse, joystick, and graphics hardware. As mentioned in the official documentation, FFplay is a very simple and portable media player using the FFmpeg libraries and the SDL library.
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