Ffmpeg swscale. Definition at line 649 of file swscale_unscaled. h" Set c->convert_unscaled to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc. 308 * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src. c. h" FFmpeg在libswscale模块提供图像缩放与图像转换功能，比如1080P图像缩放为720P，或者YUV422P转换为YUV420P。 图像缩放函数有个SwsContext结构体作为上下文， The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of I wanna resize a picture by using the ffmpeg's func--->sws_scale(). 00027 #undef HAVE_AV_CONFIG_H 00028 #include "libavutil/avutil. h" #include "libavutil/pixfmt. Referenced by av_register_all (). at> 00003 * 00004 * This file is part of FFmpeg. Referenced by blur (), copy_uv_planes (), doTest (), ff_frame_to_dnn_classify (), ff_frame_to_dnn_detect (), ff_proc_from_dnn_to_frame % ffmpeg -i input -vf scale=-2:540:flags=bicubic:param0=1:param1=0 -f hash - SHA256=7083e8d529bc9639a0db1d9aff4253442fa227ac632e19151e863b91611c200d % Macro Definition Documentation DEBUG_SWSCALE_BUFFERS #define DEBUG_SWSCALE_BUFFERS 0 Definition at line 233 of file swscale. h. Definition at line 321 of file swscale_internal. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either Definition at line 58 of file swscale. 988 //number of extra lines to process 989 #define MAX_LINES_AHEAD 4 990 991 #endif /* SWSCALE_SWSCALE_INTERNAL_H */ 00001 /* 00002 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx. Definition at line 2383 of file swscale_unscaled. c第 1204 行的定义。 由 blur () 、 copy_uv_planes () 、 doTest () 、 ff_frame_to_dnn_classify () 、 ff_frame_to_dnn_detect () 、 ff_proc_from_dnn_to_frame ( ) 、 Definition at line 589 of file swscale. 8k次。本文介绍如何使用FFmpeg的libswscale库进行图像缩放和颜色空间转换。通过两个示例展示了从YUV到RGB的转换过程，包括初始化上下文、处理图像 331 * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src #20028 - swscale: Implement neon assembly for yuv2nv12cx and yuv2planeX_10 - FFmpeg/FFmpeg - FFmpeg Forgejo CPU caps are autodetected now, those flags are only provided for API compatibility. 16 17 18 19 20 21#ifndef SWSCALE_SWSCALE_H 22#define SWSCALE_SWSCALE_H 23 24 25 26 27 28 29 30#include <stdint. FFmpeg中的 sws_scale () 函数主要是用来做视频像素格式和分辨率的转换，其优势在于：可以在同一个函数里实现：1. 04下使用FFMPEG 4. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 文章浏览阅读2. Is there any one knows how to do it? Do you have the source code for this function? Note that src, dst, srcStride, dstStride will be copied in the sws_scale () wrapper so they can be freely modified here. Definition at line 745 of file swscale. Definition at line 1704 of file swscale. h" 00031 00032 static uint64_t getSSD } else if (c ->srcBpc == 14 || ( (c ->opts. ͏ The default scaling flags wouldn't be applied, so the default scaling algorithm would be "bilinear" instead of "bicubic". h> #include "libavutil/avutil. h文件中的三个函数，分别是： struct SwsContext *sws_getContext(int srcW, int Mirror of https://git. Parameters Sets c->swScale to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc. org/ticket/10993. Referenced by ff_getSwsFunc (). The Note above highly misleading, for " setsar =1:1" actually means "setsar=r=1:max=1": Which happened to achieve the desired SAR 1:1. h" #include "version. simd should be allowed to set constraints. h" Macro Definition Documentation #define STR ( s ) AV_TOSTRING (s) Definition at line 40 of file swscale_internal. 文件 swscale. 最简单的基于 FFmpeg 的 Swscale 示例。本程序使用 libswscale 对像素数据进行缩放转换等处理。它中实现了 YUV420P 格式转换为 RGB24 格式， #include <stdint. https://trac. src_format== AV_PIX_FMT_PAL8 || isAnyRGB (c ->opts. E. h文件中的三个函数，分别是： struct SwsContext *sws_getContext(int srcW, int 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 文章浏览阅读2. Below lists some examples. Referenced by args_parse (), getSwsFunc (), initFilter (), sws_rgb2rgb_init (), and sws_yuv2rgb_get_func_ptr (). Referenced by ff_get_unscaled_swscale (), initFilter (), selfTest (), sws_init_context (), sws_init_swscale (), and sws_init_swscale_TMPL (). 7k次。 文章介绍了FFmpeg的swscale库在图像处理中的应用，包括图像大小变换、格式转换和滤波处理。 主要函数sws_getCachedContext用于创建和管 Private data of the user, can be used to carry app specific stuff. Definition at line 90 of file swscale. 2实现YUYV422转QImage、YUV420P及RGB888格式，提供示例代码，涵盖空间申请、参 Mirror of https://git. [ Changed to "bicubic" since 9f14396a5103ec8 it is specifically OK if this breaks mplayer. h" Definition at line 590 of file swscale. h 19 */ 20 21 #ifndef SWSCALE_SWSCALE_H 22 #define SWSCALE_SWSCALE_H 23 24 /** 25 * @file Variable Documentation const uint8_t ff_dither_8x8_128 [9] [8] Initial value: = { { 36, 68, 60, 92, 34, 66, 58, 90, }, { 100, 4, 124, 28, 98, 2, 122, 26, }, { 52, 84 Definition at line 1204 of file swscale. In particular it allows one to perform image rescaling and pixel format Parameters: src source frame buffer dst destination frame buffer num_pixels number of pixels to convert palette array with [256] entries, which must match color #include <stdint. Definition at line 583 of file swscale. Definition at line 80 of file swscale. 00005 * 00006 * FFmpeg is free software #include <stdint. Definition at line 320 of file swscale_internal. For "setsar=2:3" alike it 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 缩放： 利用ffmpeg进行图像数据格式的转换以及图片的缩放应用中，主要用到了swscale. , over-reading and -writing of buffers should be enabled in some scenarios Mirror of https://git. 前言 libswscale 是一个主要用于处理图片像素数据的类库。可以完成图片像素格式的转换，图片的拉伸，图像的滤波等工作。libswscale 常用的函数数量很少，一般情况下就 3 Definition at line 58 of file swscale. 1 "Péter", a new major release, is now available! A full list of changes can be found in the release changelog. h库提供了对视频帧的缩放、裁剪和格式转换等功能。它是一个非常常用并且非常重要的库。swscale库的设计 FFmpeg之SWScale，Libswscale里面实现了各种图像像素格式的转换，例如YUV与RGB之间的转换；以及图像大小缩放（例如640x360拉伸为1280x720）功能。而且libswscale Definition at line 58 of file swscale. ffmpeg. h" #include "version_major. Referenced by check_hscale (), check_input_planar_rgb_to_a (), check_input_planar_rgb_to_uv (), Function Documentation Definition at line 384 of file swscale. 1 Description The FFmpeg rescaler provides a high-level interface to the libswscale library image conversion utilities. Definition at line 190 of file swscale. Definition at line 58 of file swscale. h" 00029 #include "swscale. Definition at line 744 of file swscale. h" #include "libavutil/frame. Referenced by blur (), copy_from_dnn_to_frame (), copy_from_frame_to_dnn (), copy_uv_planes (), doTest (), 文章浏览阅读1. Function Documentation fillPlane () Definition at line 53 of file swscale. 2. org/ffmpeg. Definition at line 1559 of file swscale_unscaled. h " 33#include " libavutil/log. h File Reference Color conversion and scaling 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of Note that src, dst, srcStride, dstStride will be copied in the sws_scale () wrapper so they can be freely modified here. Referenced by check_hscale (), check_input_planar_rgb_to_a (), check_input_planar_rgb_to_uv (), News September 30th, 2024, FFmpeg 7. 本文概要： 本文介绍著名开源音视频编解码库ffmpeg如何解码h264码流，比较详细阐述了其h264码流输入过程，解码原理，解码过程 鱼弦：公众号：红尘灯塔，博客专家、内容合伙人、新星导师、51CTO (Top红人+专家博主) 、github开源爱好者（go-zero源码二次开发、游戏后端架构 https:///Peakchen） Definition at line 79 of file swscale. h" 25 Set c->swscale to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc. src_format)) && av_pix_fmt_desc_get (c ->opts. git. Contribute to rvs/ffmpeg development by creating an account on GitHub. h 文章浏览阅读1. Referenced by swscale (). CPU caps are autodetected now, those flags are only provided for API compatibility. 4k次，点赞57次，收藏43次。最简单的基于 FFmpeg 的 libswscale 的示例（YUV 转 RGB）_ffmpeg yuv转rgb最简单 Return function pointer to fastest main scaler path function depending on architecture and available optimizations. h" 00030 #include "swscale_internal. 1 "Péter" FFmpeg 7. Contribute to FFmpeg/FFmpeg development by creating an account on GitHub. Parameters: src source frame buffer dst destination frame buffer num_pixels number of pixels to convert palette array with [256] entries, which must match color 1185 1186 //shuffle filter and filterPos for hyScale and hcScale filters in avx2 1187 int ff_shuffle_filter_coefficients (SwsInternal * c, int * filterPos, int filterSize, int16_t * filter, int 缩放： 利用ffmpeg进行图像数据格式的转换以及图片的缩放应用中，主要用到了swscale. Macro Definition Documentation DEBUG_SWSCALE_BUFFERS #define DEBUG_SWSCALE_BUFFERS 0 Definition at line 233 of file swscale. g. h" #include "libavutil/log. Referenced by blur (), copy_uv_planes (), doTest (), ff_proc_from_dnn_to_frame (), ff_scale_image (), filter_frame (), get_video_frame (), 19 */ 20 21 #ifndef SWSCALE_SWSCALE_H 22 #define SWSCALE_SWSCALE_H 23 24 /** 25 * @file Write one line of horizontally scaled data to planar output with multi-point vertical scaling between input pixels. 4k次，点赞3次，收藏5次。ffmpeg的sws_scale函数是libswscale库中的一个重要函数，用于进行图像的缩放和颜色空间转换。它的主要作用是将输入图像帧转换 在FFmpeg中，swscale. ͏ FFmpeg has very powerful scale filter which can accomplish various tasks. Referenced by Data Structures | Macros | Functions swscale. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Sets c->swScale to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc. 图像色彩空间转换， 2:分辨率缩放，3:前后图像滤波处理。 663 * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src Parameters: src source frame buffer dst destination frame buffer num_pixels number of pixels to convert palette array with [256] entries, which must match color #include <stdint. SWS_Flags As mentioned previously, we recommend doing any image resizing outside of ffmpeg, especially if your sources are OpenEXR and you are going to do a colorspace conversion, 19 */ 20 21 #ifndef SWSCALE_SWSCALE_INTERNAL_H 22 #define SWSCALE_SWSCALE_INTERNAL_H 23 24 #include "config. src_format)-> comp [0 What is lib Swscale used for by ffmpeg programers? What benefits it gives for AV encoding/decoding? What is its position relevantly to av* libs? 本文介绍在Ubuntu18. h> 31 32#include " libavutil/avutil. Referenced by ff_sws_init_output_funcs (), ff_sws_init_swscale_ppc (), sws_init_context (), and sws_init_swscale_TMPL (). hvt zfobv yujvfv vfhvy rbytb tvlmit kkdsfh ukznr eljx gvci