To make a long story short, in FFmpeg-speak, I didn’t want to change the frame rate, I wanted to slow the video down, which you do with the setpts video filter documented here. In fairness, that’s what my argument asked FFmpeg to do, though clearly not what I wanted it to do. The frame rate looked correct, but when I loaded the file into the Moscow University Video Quality Measurement Tool and compared it to the 480p files I had scaled to 1080p files, I noticed the scores were abnormally low.Ī bit more analysis revealed that while FFmpeg had delivered the requested frame rate, it had done so by halving the frame rate and converting the one-minute file to two-minutes and preserving every frame. Here’s what MediaInfo said about the file I created. ffmpeg -y -i input_60.mp4 -pix_fmt yuv420p -vsync 0 -r 30 output_30.Y4M

Here’s what I tried first, a command that converts the file into a Y4M file at 1080p resolution. Here’s what I came up with.īy way of background, here’s MediaInfo on the source file: This assumption proved incorrect, and it cost me a morning to figure out a workaround. I’ve not performed measurements like this in the past and assumed that simply converting the 60 fps sources file to 30 fps via the “-r” option would convert from 60 fps to 30 fps and discard every other frame, which is what I needed. We only keep a record of the road test appointment.A recent consulting project involved computing the VMAF, SSIM, and PSNR scores of 30 fps 480p video encoded from a p source file. We value your privacy so your information is deleted after booking the road test. Our quick and simple booking form makes the process easy and our experienced customer service team will be happy to answer all questions or queries via our contact us page. Now, with our innovative new system, you are able to find the nearest cancellation date through our third party company and get started on that road est sooner!

Before Ontario Road Test was founded, youngsters found themselves waiting months before they could sit a driving test. Furthermore, you can also book with DriveTest directly without these charges – you can do this by phone or their website.įinding and booking your road test used to be difficult. Please note that by using our service, you agree to our policies. We will help you find a road test appointment that works with your schedule. We are not associated with the Ministry of Transportation or DriveTest.

is an independent, third party website that takes the stress out of finding the nearest date for your road test.

Ffmpeg images to video 60 fps