yuv converter

The simplest Video Encoder: Based on libx264 (encoding YUV is H.264), libxpolicyuvThis document records a simple H.264-based H.264 video encoder. Previously recorded H.264 encoders were encoded Based on FFmpeg calling libx264, for example:The simplest Video Encoder Based on FFMPEG (YUV encoding is H.264)Compared with the encoder above, the encoder recorded in this article is a "lightweight" encoder. Because

This document records one of the simplest video encoders based on the libx264. The previously recorded H. Encode encoder is encoded based on the FFmpeg call libx264, for example:The simplest ffmpeg-based video encoder (YUV code is h. a)Compared with the encoder above, the encoder recorded in this document belongs to the "lightweight" encoder. Because it no longer contains ffmpeg code, call libx264 to complete the encoding directly. So the size of the

This document records one of the simplest libx265-based h.265 (HEVC) video encoders. The previously recorded encoder is encoded by FFmpeg call libx265, for example:The simplest ffmpeg-based video encoder-Updated (YUV encoded as HEVC (h.265))Compared with the encoder above, the encoder recorded in this document belongs to the "lightweight" encoder. Because it no longer contains ffmpeg code, call libx265 to complete the encoding directly. So the size of

There are many kinds of YUV format, according to their sampling method, there are 444, 422, 420, and 411 (but not common). For the sort of data, there are flat format and packaging format, there is a "kick ah" unique semi-planar format-these permutations, it appears that the YUV format of a variety of, at first look disorganized, but as long as the intentions, can get the clue. Like me, also spent a lot of

1. See which YUV format conversions are supported by FFmpeg Ffmpeg-pix_fmts 2. ffmpeg convert YUV Format command Ffmpeg-pix_fmt yuv420p-s 176x144-i carphone_qcif.yuv-pix_fmt nv12 CARPHONE_QCIF_NV12.YUV 3. FFmpeg command line YUV Zoom command Ffmpeg-s:v 1920x1080-r 25-i input.yuv-vf scale=960:540-c:v rawv

will follow the introduction of the cow, the RGB to YCBCR conversion algorithm to do to summarize.Y = 0.299R + 0.587G + 0.114BU = -0.147r-0.289g + 0.436BV = 0.615r-0.515g-0.100b#deinfe SIZE 256#define XSIZE 640#define YSIZE 480#define IMGSIZE Xsize * ysizetypedef struct RGB{unsigned char R;unsigned char g;unsigned char b;}rgb;struct RGB in[imgsize]; Raw data that needs to be computedunsigned char out[imgsize * 3]; Results after the calculationunsigned short y_r[size],y_g[size],y_b[size],u_r[siz

The first tribute to Thor. This blog is based on Thor's "simplest ffmpeg-based video encoder (YUV code for H. a)" wrote, and studied it for two days at last to understand the example of the Thor. Now analysis to everyone, if there is wrong place to hope that everyone can Correct it. You can understand Thor's code based on the relationship of the object shown in this diagram, and here are a few areas that are not well understood: 1) avdictionary struc

When you initially design the YUV playback parameters, consider the preservation of the parameters, that is, the use of the registry method, described earlier. But it was not until later that a few technical questions were resolved before the article could be written. The resolution is used as a drop-down box, initialized at program startup, and not written to the resource. The registry is saved with a string field, separated by a semicolon ";". After

The previous article is mainly referring to Awesomeplayer directly with the Softwarerenderer class to display the YUV, in order to use this class, at all, relying on the libstagefright, libstagefright_color_ Conversion and other dynamic static library, which causes the program to have a high degree of coupling, nor is it easy for us to understand the underlying reasons for the direct display of YUV data.So

A problem encountered a few days ago, we need to do a full black raw data pressure code test for the encode, because the raw data format is YUV, so of course we set all the values to 0, because the Y value (brightness) is set to 0, I thought that the frame produced by the pixel code should be black. After the compression, I found it was pink. This was dizzy, because all black means all 0 for RGB, we need to look for the algorithm for converting RGB an

The simplest Video Encoder: libvpx (YUV is VP8) and libvpxvp8This document records a simple VP8 Video Encoder Based on libvpx. This example is simplified from the official sample code. I found that unlike H.264, VP8 bare streams (that is, pure video data streams without encapsulation formats) cannot be played. In other words, the VP8 bare stream must be stored in the container for playback. In the official sample code, the Encapsulation Format for sto

During the previous code writing process, each frame in the YUV video must be extracted and saved as an image. There are two common methods on the Internet. The first method is to use opencv to bring cvCvtColor, but this method has a bug and the image obtained will be white. The second method is the formula. Method 1: opencv comes with cvCvtColor Note: This method will show an image "Extensive white". The specific reason is that the cvCvtColor functio

650) this.width=650; "src=" http://www.geconline.cn/files/default/2016/03-06/134951f64086892368.jpg?6.15.4 "style= "Border:0px;vertical-align:middle;height:auto;"/>Camera image data in the mainstream packaging format is JPEG/MJPG/YUV, these are encoded compressed data, greatly reducing the size of the image, easy to transfer and storage.Expand:YUV is the mainstream format of video image data, it is based on the visual characteristics of the human eye

DWORD Threadfun (){Create an SDL window with the MFC Windows handleSdl_window * Pwindow = Sdl_createwindowfrom ((void *) (GetDlgItem (IDC_STATIC1)->getsafehwnd ()));Sdl_rect SDLRT;SdlRT.h = 288;SDLRT.W = 352;sdlrt.x = 0;Sdlrt.y = 0;Sdl_rect DSTRT;DstRT.h = 288;DSTRT.W = 352;dstrt.x = 0;Dstrt.y = 0;int IW = 352;int IH = 288;Char szdata[352*288*2] = {0};Char szprint[256] = {0};Calculates the number of bytes in a YUV row of dataint ipitch = Iw*sdl_bytesp

ffmpeg scale and format convert YUV data The following code is a code that implements a change in the width or YUV format of YUV with FFmpeg. For example: 352*288->720*576 (with double three or bilinear difference), yuv420p->yuv422p int videoscaleyuvzoom (int is_flip,int in_width, int in_height,int in_pix_fmt, int out_width, int out_height,int ou t_pix_fmt,ui

YUV is a color model of the image color space. This model separates brightness from color. Three commonly used color models are rgb cmyk and YUV. YCbCr is part of ITU-R bt601 and is the result of YUV scaling and offset processing. Among them, Y has the same meaning as Y in YUV, and cb cr also refers to color. The c

Source code download On a PC, DirectDraw is generally used to display videos in YUV format, such as yv12 and yuy2, and overlay is used to display videos on the graphics card. Overlay is a hardware-based technology implemented on graphics cards to play VCD on PCs. The emergence of overlay solves the difficulties encountered in playing VCD on PC. Early PC processing capabilities were limited. During VCD playback, not only video decoding was requ

iOS-oriented encoding |iosvideotoolbox: YUV image of Read-write decoding callback function cvimagebufferref This document is based on the decoding of H. Read video Toolbox decodes the method of the YUV or RGB data in the callback function parameter Cvimagebufferref, and gives the cvimagebufferref to generate the gray-scale graph code, convenient debugging. At the same time, it also introduces the problem th

Now let's learn how to use the Edius YUV. First we import a picture into the Edius, then turn on the effects panel and click the Color correction under the video filter. At this time we will be in the right side of the panel on a lot of color adjustment filter effects, here we choose the "YUV" curve and dragged to the material picture. After completing the above steps, we can change the color of the pictu

The size of the picture is defined as: W * H, W and h in width and height respectively First, YUV420 format First Y, back V, Middle is U. Where the y is w * h,u and V is W/2 * (H/2) if w = 4,h = 2, then: yyyy yyyy Uu vv The memory is: YYYYYYYYUUVV Memory to occupy: W * H * 3/2 Sampling law is: each pixel sampling y, odd row sampling 1/2 u, not sampling V, even row sampling 1/2 V, do not sample U Second, YUV422 format This format is more widely used One group per two points, 4 bytes in total Yu