Ffmpeg Scale To 720p, Even if you're new to this command-line

Ffmpeg Scale To 720p, Even if you're new to this command-line tool, this guide will help you navigate the process step by step. The scale video filter is for resizing the video. However topics A guide to upscaling or downscaling video with FFmpeg and encoding - Which resize algorithm to choose for videos? - Super User seems to recommend when sampling down to use Lanczos filtering. Learn how to convert videos to various resolutions using FFmpeg for bandwidth optimization and video quality improvements. ffmpeg -i INPUT -c:a copy -c:v libx264 -crf 10 -preset ultrafast -s 1280x720 -pix_fmt yuv420p -map 0 OUTPUT -c:a copy will copy audio tracks instead of re-encoding -c:v libx264 – use libx264 encoder for video tracks -crf 10 value is low enough to look good (even with ultrafast preset), but will produce quite a large file. So for example, to change video resolution to 720p, use the following command: ~$ ffmpeg -i INPUT_VIDEO -filter:v scale=-2:360 OUTPUT_VIDEO. Learn how to easily resize videos using FFmpeg with this step-by-step guide. Scaling a video means to make it either larger (higher resolution) or smaller (smaller resolution). In contrast, if you’ve read this far, you know that the typical scaling technique used by most beginning FFmpeg producers is the -s command (-s 1280×720). Here are the detailed steps about how to resize vieo with FFmpeg. For all rungs below 4K, FFmpeg scales the original source footage down to the target resolution using the bicubic scaling algorithm, 1 You would use the scale and pad filters to accomplish this. If you need to simply resize your video to a specific size (e. Scaling a Video with FFmpeg Let’s downsample a 1920×1080 pixels video to 640×480 pixels using the following ffmpeg command: $ ffmpeg -i example. Here are some FFmpeg commands to help you out: Here, you're telling FFmpeg to scale the video to 720p and then encode it using crf=18 with libx264's slow preset that usually provides very good quality due to the number of coding tools that it turns on. mp4 Part 4. mkv -vf scale=iw*2:ih*2:flags=neighbor -c:v libx264 -preset slow -crf 18 output. mp4 ctrl + c youtube github Making a video smaller (downscaling) or bigger (upscaling) with FFmpeg is actually very easy. scale=960:720 Scaling the video slightly to bring it back to your original 720p, the 960 is to keep it at a nice 4x3 ratio. mp4 -vf scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:-1:-1,setsar=1 -r 60 output. Dec 2, 2020 · Learn how to change the resolution, resize, or scale a video using FFmpeg's command-line tool including tips on retaining the aspect ratio and video quality. What does high-definition mean? High-definition video, also known as HD video, is a video with high resolution and quality. The thing about FFmpeg is that there are multiple ways to accomplish the same basic function. The points where the linear chains join are labelled by names enclosed in square brackets. Information covered at Scaling – FFmpeg and FFmpeg Scaler Documentation does not really help outside of explaining how to use it. mp4`. I have found a pretty good compromise on another question which only scales down videos and scales them down to under a certain maximum dimension (which in my case is max (maxHeight, maxWidth)) and doesn't add padding, cropping or distortion: Here is the filter: We can easily resize videos with FFmpeg‘s scale filter: ffmpeg -i input_1080p. In our example, crop,vflip are in one linear chain, split and overlay are separately in another. We've broken it down and made it easy to use FFmpeg to resize videos. You just set one size – which is the height in this example – and use -1 for the other dimension. FAQs of Upscaling Video 1. ffmpeg How to upscale video to 720p ffmpeg -i in. This guide provides the simple command to change a video's resolution while showing you how to maintain the aspect ratio. This can result in a distorted video if input and output aspect ratios are different. Use your player If you don't want to bother with re-encoding, then any player worth using should allow you to do this upon playback. How to do video scaling using FFmpeg with examples for different types of upscaling and downscaling methods. Same for 720p; as long as the end height is 720p or higher but lower than 1080p, the max Youtube quality will be 720. mp4 Here, the -vf option stands for video filter, and the scale=640:480 parameter tells FFmpeg to resize the video to 640 pixels wide and 480 pixels high. mp4 as appended at the end of the command. mp4 -vf scale=640:480 output. For common high-definition video, we have 720p, 1080i, 1080p and 1440p. jpg I get the error message: At least one output file This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. I have solved it by computing the aspect ratio in the Python script and then pass the ffmpeg scale= params I want. Some Useful ffmpeg Commands Published: 2021-12-18 Last Updated: 2023-07-11 ffmpeg is an incredibly useful CLI tool that I use to modify video files. mp4 -vf scale=3840x2560:flags=lanczos -c:v libx264 -preset slow -crf 21 output_compress_4k. 5GB, perfect for web streaming and mobile devices. mp4 -vf scale=1920:1080 output. Learn more about bidirectional Unicode characters ffmpeg -i INPUT. ffmpeg will recalculate the correct value automatically while preserving the aspect ratio. ffmpeg -i video. This scaling is not needed, your preference. mp4 -filter:v scale=720:480 -c:a copy output_480p. 1 You would use the scale and pad filters to accomplish this. ffmpeg -c:v libx264 -crf 28 -preset fast -vf scale=720:-2 Compress to 720p H. ffmpeg -i input. $ ffmpeg -i input. jpg -vf scale=360:240 &gt; 2. mkv -ac 2 -ar 48000 -ab 256k -c:a aac -codec:v libx264 -pix_fmt yuv420p -b:v 1100k -vf "scale=720:trunc(ow/a/2)*2" output. EXT As you can see, I am using -2 instead of -1 because the FFmpeg's default encoder (libx264 on 5 Jan 2021 on Arch Linux) accepts only those WIDTH and HEIGHT which are divisible by 2. mp4 and please help me , i am unable to give it INPUT V FFmpeg is an essential tool for video processing, providing robust features for scaling and adjusting the aspect ratio of video files. Is it possible to resize an image using FFmpeg? I have this so far: ffmpeg. mp4 In this command, ffmpeg invokes the FFmpeg tool with the -i option, used to specify the input video file. mkv -ac 6 -ar 48000 -ab 224k -c:a aac -codec:v libx264 -pix_fmt yuv420p -b:v 1500k -vf "scale=1280:trunc(ow/a/2)*2" output. -i 1. mp4 This command will downscale the input video to 1920×1080 pixels and output the result to a file called `output. mov -vf scale=320:240 output. 264 Use original video os. Discover simple commands for setting fixed dimensions, maintaining aspect ratios, and optimizing your video files for sharing and compatibility across devices. Filters in the same linear chain are separated by commas, and distinct linear chains of filters are separated by semicolons. The scale command works for images and videos. Below are some of my favorite and frequently used commands. To review, open the file in an editor that reveals hidden Unicode characters. stackexchange answer that puts it all in one place. We look at four approaches to see how scaling method and technique impact quality and throughput though. Dec 21, 2015 · This covers the scaling command very clearly with examples. g 320x240), you can use the scale filter in its most basic form: Same works for images too: The resulting image will look like this: As you can see, the aspect ratio is not the same as in the original image, so the image appears stretched. 文章浏览阅读3. 1 or newer for this - the -strict option hasn't been needed for typical MP4 output since 2015 so your ffmpeg build may be very old. Oct 16, 2025 · Resize and scale videos effortlessly with FFmpeg. This could mean shrinking a 10GB file to around 1. mp4 -vf scale=1280:720 video_resized. ReadFile Load video bytes uploadMedia Upload to WhatsApp servers How to make FFmpeg change resolution? What commands do you need? Are there any alternative ways to change resolution easily? Read this post! The thing about FFmpeg is that there are multiple ways to accomplish the same basic function. mp4 ffmpeg -i input. The part of the command where actual video processing happens is -filter:v “crop=out_w:out_h:x:y”. Smaller files mean faster uploads, smoother playback, and lower storage costs. mp4 480p $ ffmpeg -i input. In the example, the split filter generates two outputs that are associated to the $ ffmpeg -i input. @DanielCarrascoMarín Yep, when you have no control over the input video size, then the problem of divisibility by 2 is not possible to solve by ffmpeg itself (unfortunately). Q: How do I downscale a video to 1080p using FFmpeg? To downscale a video to 1080p using FFmpeg, you can use the following command: ffmpeg -i input. mp4 This scales the input 1080p video down to 480p resolution, resulting in smaller file sizes while maintaining the original audio track. mkv Change 2 for 4 or 8 until the resolution is 1080p or higher. mp4 Use ffmpeg v4. mp4 -filter:v "crop=out_w:out_h:x:y" output. Thus, if you REALLY want to stretch a video out "Stretch Armstrong" style, you need to force the SAR (Sample Aspect Ratio): ffmpeg -i <something> -vf scale=iw*55:ih,setsar=1:1 This is not really well described in the FFMPEG manual, here's a video. The output file is output. You can achieve this by setting one of the dimensions to -1, which tells FFmpeg to automatically calculate the appropriate value. The most basic scaling command below will simply resize the video to the required size in pixels. I need to covert 720p or 1080p video to 480p mp4 video , i found below code ffmpeg -i input -vf scale=-1:480 -vcodec mpeg4 -qscale 3 output. Mar 1, 2025 · Resizing a 4K video (3840x2160) to 720p (1280x720) can reduce the file size dramatically, often by 80%. Example using ffplay: ffplay -vf "scale=-1:720,pad=1280:ih:(ow-iw)/2" input Or see "Video Effects" in VLC. Resize Resolution of Video File For this example, I'm converting a 1080p video to 720p, but you can update the values after scale such as 1920x1080 (if you're reducing from a 4K video) or ffmpeg -i input. mp4 Learn how to convert videos to various resolutions using FFmpeg for bandwidth optimization and video quality improvements. These tasks are critical for ensuring that video content fits specific display or streaming requirements, such as optimizing the resolution for different platforms or maintaining the correct width-to-height ratio without distortion. 9k次，点赞3次，收藏5次。本文详细介绍了使用ffmpeg进行视频分辨率转码的过程，包括1080p和720p的转码命令，以及视频比特率、视频码率缓冲区大小、视频格式等关键参数的设置方法。. mp4 -vf scale=-1:720:flags=lanczos -c:v libx264 -crf 21 out. mp4 -vf scale=-1:720 -c:v libx264 -crf 18 -preset veryslow -c:a copy FFmpeg is a free command-line tool whose static role is to convert both video and audio file formats. mp4 Maintaining Aspect Ratio When resizing videos, it’s often crucial to maintain the aspect ratio to avoid distortion. For all rungs below 4K, FFmpeg scales the original source footage down to the target resolution using the bicubic scaling algorithm, How to change video resolution with FFmpeg effectively? A comprehensive guide for FFmpeg change video resolution with command lines for optimal visual impact. For instance, if you want to resize the video to a width of 1280 pixels while maintaining How can I use ffmpeg to reduce the size of a video by lowering the quality (as minimally as possible, naturally, because I need it to run on a mobile device that doesn't have much available space)? 720p u2028$ ffmpeg -i input. z2yp, chfpk, 2m2aa, mp6ii9, ail0z, 12v3, iuawo, sxbu, g96p9, xf3h,