Rotating a Video by 90 Degrees using FFmpeg: A Step-by-Step Guide

When working with 360-degree videos, it's not uncommon to encounter issues with their orientation. In this article, we'll explore how to use FFmpeg to rotate a video by 90 degrees using the rotate filter.

Before we dive into the solution, let's take a look at some of the key settings used in our example:

* X265: This is the H.265 codec used for encoding the video.

* Rate Control / qCompress: These settings allow us to control the bitrate and quality of the encoded video.

* References / ref-limit cu: These settings enable reference frames and limit the number of cumulative updates.

* b-pyramid / weightp / weightb: These settings enable B-frames, which are used for efficient encoding.

* Lookahead / bframes / badapt: These settings allow FFmpeg to look ahead in time and adjust the number of B-frames accordingly.

Now that we've covered some of the key settings, let's move on to the actual command used to rotate our video:

`ffmpeg -i Petr_doskok.mp4 -vf 'scale=2048x1024,rotate=-PI/2' -r 30 -c:v libx265 -b:v 15M -pix_fmt yuv420p -c:a aac -b:a 192K Petr_doskok_rotated.mp4`

In this command, we're using the scale filter to resize our video to 2048x1024 pixels. We're then applying the rotate filter, which rotates our video by 90 degrees clockwise (or left). The -r option sets the frame rate, and the -c:v and -b:v options set the video codec and bitrate, respectively.

If you've tried using the rotate filter before, but encountered issues, it's likely because you're not using the correct syntax. Some online resources recommend using the anycodings_360-degrees filter, which can be helpful for certain situations. However, in our case, we're using the rotate filter directly.

When rotating a 360-degree video, it's essential to fine-tune its orientation to ensure that the resulting video looks correct. FFmpeg provides several filters and options that allow us to achieve this goal.

In summary, using FFmpeg to rotate a video by 90 degrees is a straightforward process. By applying the scale and rotate filters, we can easily resize and orient our video as needed. Whether you're working with standard videos or 360-degree content, FFmpeg provides a powerful set of tools for achieving your video processing goals.

Ffmpeg rotate video degrees