Even using the highest quality -q:v value (2) for.
The outputted frames for the whole video range between 278kb and 335kb.png vs.
If it is not specified, it is inherited from the input rate, whether that’s manually set or altered or an inherent property of the stream (e.g. As an output option, it will duplicate or drop frames to achieve the given rate (note that it won’t duplicate frames if output format accepts variable frame rate). r is used here for output (can also be used for input). You can extract frames by defining the amount of frames (per second) you want to extract using -r. -ss: seeks to the given timestamp in the format HH:MM:SSįor most of our requirements, we extract a certain number of frames from a video to ensure a nice spacing between images in a virtual tour.-map: allows you to specify streams inside a file.-pix_fmt: sets the pixel format of the output video, required for some input files and so recommended to always use and set to yuv420p for playback.-r: sets the frame rate of the output video.-vf: sets so called video filters, which allow you to apply transformations on a video like scale for changing the resolution and setdar for setting an aspect ratio.Options include libx264 for H.264, libx265 for H.265/HEVC, and copy if you want to preserve the video codec of the input video.
-c:v: sets the video codec you want to use.-i: is follwed by the path to the input video.The basicsīefore jumping into some examples, let’s start with some of the most widely used commands:
It is 170mb video (20 seconds long) and was shot at 30 FPS on a GoPro MAX Camera and stitched using GoPro Player at 4k (4096x2048). This blog post, or cheat sheet as I’m calling it, will help you get to grips with some of the commands that we often use to process videos to make virtual tours.įor this example I will be using the following equirectangular video ( GS018421.mp4). A guide that shows some of the commands we use most for processing 360 virtual tour videos.įFmpeg is one of the most powerful tools for video transcoding and manipulation, but it’s fairly complex and confusing to use.
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