Ffmpeg scale and pad. mp4 Use ffmpeg v4. Depending on ...

Ffmpeg scale and pad. mp4 Use ffmpeg v4. Depending on the needs, this Pad images with ffmpeg. But horizontal resolution was halved. 2k次，点赞10次，收藏17次。本文详细介绍使用FFmpeg进行视频编辑的技巧，包括视频尺寸调整、翻转、拼接及复杂过滤器链应用。通过实际案例，如视频宽度放大、水平翻转及视频叠加，展示如何高效操作视频内容。 lomero Member Jan 2019 i've solved with 2 step: first scale video -s 960x432 second add pad only (found correct value!) with -vf pad=960:540:0:54 but how to have everything in one step? 1 You would use the scale and pad filters to accomplish this. I want to generate 16:9 thumbnails from videos with white padding but the resulting picture has grey padding instead of white. I would like to keep the original aspect ratio and add black bars to the. 1 Description The FFmpeg rescaler provides a high-level interface to the libswscale library image conversion utilities. mp4" # fac=${1:-80} cx=$((16 * ${fac})) cy=$((9 * ${fac})) ox=$((1920 - 16 * ${fac I want to know how to use the scale filter to take an image that is 2154x1136 and scale it down exactly 89. The scale filter forces the output display aspect ratio to be the same of the input, by changing the output sample aspect ratio. With CPU based transcoding you just add: scale=1920:1080:force_original_aspect_ratio=decr ffmpeg -i input. Aspect Ratio Adjustment Adjusting the aspect ratio of a video means changing the width and height to fit a new ratio. mov -vf scale=720x406,setdar=16:9 -preset slow -profile:v main -crf 20 output. My video is an image loop, that lasts 5 seconds, 10 frames per second. mp4 -vf "scale=-1:1080,pad=1920:ih:(ow-iw)/2" -c:v libx264 -preset medium -crf 23 -c:a copy output. | ffmpeg resize video Filters in the same linear chain are separated by commas, and distinct linear chains of filters are separated by semicolons. ffmpeg -i input. […] I'm using this command to encode videos $transcode = FFMPEG_BINARY. ), specified by the -i option, and writes to an arbitrary number of outputs, which are specified by a plain output url. png" ͏ More examples: Nov 18, 2025 · FFmpeg 8. 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. jpg I get the error message: At least one output file ffmpeg -i test. resize all videos by bigest side ( by width or height ) and add pad to videos on the smaller side resize all videos by smaller side ( by width or height ) and crop use original size, but add background to videos Today we will use ffmpeg filter ‘ pad ‘ For example, we have 3 videos with resolution 640×480, 1920×1080 and vertical video 720 If you are inputting a series of images, and the images vary in size, add the eval=frame option in the scale filter, such as: ffmpeg -i input -vf "scale=1280:720:force_original_aspect_ratio=decrease:eval=frame,pad=1280:720:-1:-1:color=black" output Changing the background color Use the color option in the pad filter. 35:1 (1920x816) aspect ratio. For this, I use: ffmpeg -r 10 -loop 27 For posterity: The accepted answer does not work if the input sources are of different sizes (which is the primary reason why you need to scale before combining). Padding and scaling are used for adjusting resolution and aspect ratio, such as converting a horizontal clip to a vertical one, which is particularly useful for platforms like TikTok, YouTube Shorts, and Instagram Reels. pad This will pillarbox the image. mp4 -vf scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:-1:-1,setsar=1 -r 60 output. mp4 -vf "scale=1280:720" output. 39:1 (aka two-four-oh), rather than 2. -i 1. Here the video output width and height are 640x480 and the image is placed 120 pixels from top, 0 pixels from left. avi -filter:v "crop=1280:670" output_video. Today, we show how to pad a video to fill up the screen, using ffmpeg. org given as ffmpeg -i input. I'm trying to use my Vega 11 GPU to perform hardware accelerated transcoding of some video files to a resolution of 1280x720. mp4 There are around 40 videos from the last couple years. I want to fully hw transcode mkv files to mp4 and up- /downscale the content maintaning the aspect ratio. # Options The filter accepts the following options, any Hi Massimo, Sorry to be very late in replying: On 25/02/2014 15:19, Massimo Battistel wrote: > hello, > I have to scale 16:9 interlaced 1080i video down to PAL 576i 4:3 with black > bars. GitHub Gist: instantly share code, notes, and snippets. 0 introduces a major performance boost with pad_cuda, an Nvidia GPU-accelerated padding filter that works with scale_cuda. Is there a way to scale a video over time with ffmpeg ? This is the result that I want: I have been looking through the documentation and you can change the scale but no over time. Oct 25, 2015 · You have two main options to make it fit after using scale: pad or crop. pad=1280:720: (ow-iw)/2: (oh-ih)/2 adds black padding (letterboxing or pillarboxing) where necessary to ensure the final video fits exactly within the 1280x720 resolution. txt -vf "scale=iw*min(1920/iw\,1080/ih):ih*min(1920/iw\,1080/ih),pad=1920:1080:(1920-iw)/2:(1080-ih)/2:black" output. mp4 I thought it had something to do with the Scale of the video but honestly every scale code I tried to use deformed the image a lot. We first maximize the video size then pad with black or colored bars. jpg -vf scale=360:240 > 2. Maintaining the aspect ratio The aspect ratio is the ratio between the width and height of a video. I need to scale all of them so that they fit neatly inside a 640x360 (16x9) container with the following specs: 16x9, 640x360, 1600kbps, Master video cropping and resizing with FFmpeg in this developer-friendly guide. avi The video filter syntax is the new way to use padding. jpg 600w x 593h 2_back. It Is there a way to reorder the operations so that it scales the video first and then interlaces the video? Also, to make matters more complicated, I occasionally get footage that is vertical, which I need to scale to 1920x1080 and pad the sides out to maintain the aspect ratio of the original video. -1 can also be used for width if you provide a given height. What you need to do is to first scale and then pipe that video output into the concat filter like so: ffmpeg -i input1. $ ffmpeg -i INPUT. I use this command line to do this. ---This video is based on the question https:/ 文章浏览阅读9. mp4" vright="Eduardo. @maf-soft Because the comma is usually used by ffmpeg to separate filters in a filter chain (in the above example, between scale and pad). ffmpeg -f concat -i inputs. jpg 600w x 59 Scale (resize) the input video, using the libswscale library. I have a ffmpeg command which takes a bunch of audio files, 3 image files, and renders a video with them. " I am using below command to create a slideshow using ffmpeg: ffmpeg -r 1 -i IMG_%04d. I am looking for setting a custom scale for my first three frames of a video, with ffmpeg. '" -vf scale='. The parameters tell the pad filter to make the output 720x1280 and to place the input image in the center of the frame. VIDEO_SIZE_X. mp4 This works because the documentation for the pad filter states: x, y Specify the offsets to place the input image at within the padded area, with respect to the top/left border of the output image. Learn essential FFmpeg cropping and resizing commands, and how to automate them using scripts. The pad filter will fill the output image with black anywhere that the input image doesn't cover. In particular it allows one to perform image rescaling and pixel format conversion. mp4 -filter:v "scale=width=1920:height=816,setdar=ratio=1920/816" -codec:v libx264 -pix_fmt:v yuv420p -codec:a copy -f mp4 -movflags +faststart OUTPUT. #! /bin/sh pref="`basename $0 . To work out your exact dimensions, just apply the same principles. This is the command line (input here is a jpg but the effect is the same FFMPEG scale video to 720px, add black fields at the top and bottom and output 720x1280 (portrait) [duplicate] Ask Question Asked 8 years, 2 months ago Modified 8 years, 2 months ago How can i speed up complex filter with scale, pad and overlay operations? Ask Question Asked 4 years, 11 months ago Modified 4 years, 11 months ago I'm using ffmpeg command line in Android and I used the code from ffmpeg. mp4 Note that you may find that if it is a modern movie, it may have been produced to be displayed at 2. I'm using a simple ffmpeg command to resize and pad images to fit within a 960x540 frame. mp4 -filter_complex \ Is it possible to use ffmpeg to add blank / black height, while preserving the video and audio quality? Tried doing this, which seemed to work (took about 2 hours, the same length of the video), but greatly reduced the file size/video quality): I have a portrait video (9:16 ratio) taken on a phone, and would like to convert it to a lanscape one (16:9), either with black padding on the side or, ideally, with blurred padding (but not overly I have 45 videos of varying aspect ratios and resolutions. mp4 The -vf "scale=1280:720" argument tells FFmpeg to scale the video to 1280 pixels by 720 pixels. mkv The -1 will tell ffmpeg to automatically choose the correct height in relation to the provided width to preserve the aspect ratio. However with this commando FFmpeg complains that -filter_complex and -vf can not be used in the same commando. In order to achieve this I calculate first the dimensions of the resized video so That it fits my area, and then I try to add padding 29 Try it this way instead: ffmpeg -i input. mp3 -c:v libx264 -c:a aac -pix_fmt yuv420p -r 24 -y output. Take a look at these examples and the documentation for each filter. 04% such that the image sits in a 1920x1080 frame, with full image left and right and black letterboxing top and bottom. jpg 600w x 466h 3_cd. mp4 > > Easy and fast. Setting the output width and height works in the same way as for the scale filter. txt), scale them to 1920x1080 and pad the empty areas with black. VIDEO_SIZE_Y ffmpeg -i "input. mov Main profile is good for device compatibility, the slow preset for the libx264 encoder is a pretty good balance of speed and quality, so this is a good general web-encoding workhorse. mp4" -c:a copy -c:v libx264 \ -vf "pad=width=1280:height=720:x=-1:y=-1:color=black" output. pad=width= 640:height= 480:x= 0:y= 40:color= violet Pad the input to get an output with dimensions increased by 3/2, and put the input video at the center of the padded area: Hey all, I have the below FFmpeg command which I am trying to scale down and then pad the video. ffmpeg -i input -vf "scale=-1:720,pad=1280:ih:(ow-iw)/2" output A more generic command that will work for all input file aspect ratios will use force_original_aspect_ratio=1 as an option to scale: ffmpeg -i input -vf Sep 10, 2024 · ͏ ffmpeg -i "input. Using Windows Subsystems for Linux or WSL1, I opened a command prompt and ran bash. Here are some FFmpeg commands to help you out: Use the NVIDIA Performance Primitives (libnpp) to perform scaling and/or pixel format conversion on CUDA video frames. $files ['original']. FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. In the example, the split filter generates two outputs that are associated to the ffmpeg reads from an arbitrary number of inputs (which can be regular files, pipes, network streams, grabbing devices, etc. I am trying to convert a large number of files from many sources into a standard format of 426x240 using ffmpeg with the following arguments: -y -i input. Because these operations modify every pixel With Cincopa , you can easily integrate FFmpeg filters into your media management workflows for seamless video manipulation, including crop, scale, pad, overlay, and more. In the case of your input, we know that the scale filter scaled the height to 720, but the width is short of 1280. avi -vf "pad=width=640:height=480:x=0:y=120:color=black" output. mp4 -vcodec rawvideo -vf > scale=w=720:h=432:interl=1,pad=720:576:0:72 -acodec copy out. For a recent work project, I had to downscale a video to a fixed size to fit into our application as designed. If set to the string "same" (the default), the input format will be kept. I tried to create a video using multiple images having different scales or sizes or (height*widths) using Mobile-FFmpeg # I am using this code script to get the required result: val filterStringBui So, a reasonably complete command would look like: ffmpeg -i input. mp4 -i input2. I'm trying to resize a larger video to fit an area that I have. While the exampl The ffmpeg command I ran is as follows ffmpeg -i input. avi -filter:v scale=720:-1 -c:a copy output. Image Input Dimmensions: 1_front. By quoting it, ffmpeg will not interpret the comma that way, but use it as part of the first option passed to scale, which is min(1280,iw). ' -loglevel panic -y -i "'. mp4 Solution, command, explanation: w=1920 is the output width, h=ih is the output height (unchanged), x=96 and y=0 means the original video will be placed 96 pixels to the right of the top left of the output layout; think of the output layout as a 1920x1080 How to resize a video To change the resolution of a video file, we can use the scale filter: $ ffmpeg -i input. I'd like the padding to be transparent but I get different behavior on different images. With the right FFmpeg command utilizing the scale and pad filters, you can achieve a high-quality video that meets your desired resolution while preserving the original aspect ratio. mp4 -vf pad=ceil (iw/2)*2:ceil (ih/2)*2 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. jpg" -vf "scale=320:240:force_original_aspect_ratio=1,pad=320:240: ( ( (ow - iw)/2 )): ( ( (oh - ih)/2 ))" "output_320_padding. sh`" vleft="EuropeanArchive. Covers ffmpeg -vf scale, aspect ratio preservation, batch processing, and 4K to 720p conversion. mp4 -filter_complex "[0]pad=w=1920:h=ih:x=96:y=0:color=black" output. mp4 This command collects a bunch of different videos (specified on inputs. mov -ac 2 -ab 96k -ar 44100 -vcodec libx264 - Explanation: scale=1280:720 resizes the video to fit within a 1280x720 frame. jpeg -i audio. The points where the linear chains join are labelled by names enclosed in square brackets. ':'. Learn how to efficiently scale and resize videos using FFmpeg. Command: ffmpeg Learn how to convert videos to various resolutions using FFmpeg for bandwidth optimization and video quality improvements. jpg -vf scale="'if(gt(a,4/3),320,-1)':'if(gt(a,4/3),-1,240 Making a video smaller (downscaling) or bigger (upscaling) with FFmpeg is actually very easy. Though I didn't know the exact options, I new this was a perfect task for my good friend ffmpeg. > > This was attempt #1: > > ffmpeg -i interlaced1080i. The values in scale and pad are derived dynamically and correspond to the video height and video width. 2 Scaler Options The video scaler supports the following named options. If the input image format is different from the format requested by the next filter, the scale filter will convert the input to the requested format. I keep getting the error "Padded dimensions cannot be smaller than input dimensions. Mar 1, 2025 · Copy-paste FFmpeg commands to resize, scale, and compress video. In our example, crop,vflip are in one linear chain, split and overlay are separately in another. Learn how to resolve the `FFmpeg` error when scaling a video with a watermark by correcting filterchain syntax. Note that automatic pad=width= 640:height= 480:x= 0:y= 40:color= violet Pad the input to get an output with dimensions increased by 3/2, and put the input video at the center of the padded area: Is it possible to resize an image using FFmpeg? I have this so far: ffmpeg. FFMPEG is a powerful tool for working with video and audio files, offering a wide range of features for encoding, decoding, transcoding, and manipulating media. This guide provides step-by-step instructions and examples to help you adjust video dimensions while maintaining quality. The following additional options are accepted: format The pixel format of the output CUDA frames. kjsrb, mid30y, sopk, asbfl, aijx, kj9bls, rmvyh, yzjc, sly7, eju7,