（转）FFMPEG 实现 YUV，RGB各种图像原始数据之间的转换（swscale）

分类专栏： FFMPEG FFmpeg

本文链接：https://blog.csdn.net/leixiaohua1020/article/details/14215391
FFMPEG中的swscale提供了视频原始数据（YUV420，YUV422，YUV444，RGB24...）之间的转换，分辨率变换等操作，使用起来十分方便，在这里记录一下它的用法。
swscale主要用于在2个AVFrame之间进行转换。
下面来看一个视频解码的简单例子，这个程序完成了对"北京移动开发者大会茶歇视频2.flv"（其实就是优酷上的一个普通视频）的解码工作，并将解码后的数据保存为原始数据文件（例如YUV420，YUV422，RGB24等等）。其中略去了很多的代码。
  1. //ffmpeg simple player
  2. //
  3. //媒资检索系统子系统
  4. //
  5. //2013 雷霄骅 leixiaohua1020@126.com
  6. //中国传媒大学/数字电视技术
  7. //
  8. #include "stdafx.h"
  9.  
  10. int _tmain(int argc, _TCHAR* argv[])
  11. {
  12. AVFormatContext *pFormatCtx;
  13. int i, videoindex;
  14. AVCodecContext *pCodecCtx;
  15. AVCodec *pCodec;
  16. char filepath[]="北京移动开发者大会茶歇视频2.flv";
  17. av_register_all();
  18. avformat_network_init();
  19. pFormatCtx = avformat_alloc_context();
  20. if(avformat_open_input(&pFormatCtx,filepath,NULL,NULL)!=0){
  21. printf("无法打开文件 ");
  22. return -1;
  23. }
  24.  
  25. ......
  26.  
  27. AVFrame *pFrame,*pFrameYUV;
  28. pFrame=avcodec_alloc_frame();
  29. pFrameYUV=avcodec_alloc_frame();
  30. uint8_t *out_buffer;
  31.  
  32. out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height)];
  33. avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height);
  34. /*
  35. out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height)];
  36. avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);*/
  37.  
  38. /*
  39. out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_UYVY422, pCodecCtx->width, pCodecCtx->height)];
  40. avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_UYVY422, pCodecCtx->width, pCodecCtx->height);
  41. out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_YUV422P, pCodecCtx->width, pCodecCtx->height)];
  42. avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV422P, pCodecCtx->width, pCodecCtx->height);*/
  43.  
  44. ......
  45.  
  46. FILE *output=fopen("out.rgb","wb+");
  47. //------------------------------
  48. while(av_read_frame(pFormatCtx, packet)>=0)
  49. {
  50. if(packet->stream_index==videoindex)
  51. {
  52. ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
  53.  
  54. if(ret < 0)
  55. {
  56. printf("解码错误 ");
  57. return -1;
  58. }
  59. if(got_picture)
  60. {
  61. /*img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_UYVY422, SWS_BICUBIC, NULL, NULL, NULL);
  62. sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
  63. img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV422P, SWS_BICUBIC, NULL, NULL, NULL);
  64. sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);*/
  65. //转换
  66. img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL);
  67. sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
  68.  
  69.  
  70. //RGB
  71. fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height)*3,1,output);
  72. /*
  73. //UYVY
  74. fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height),2,output);
  75. //YUV420P
  76. fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height),1,output);
  77. fwrite(pFrameYUV->data[1],(pCodecCtx->width)*(pCodecCtx->height)/4,1,output);
  78. fwrite(pFrameYUV->data[2],(pCodecCtx->width)*(pCodecCtx->height)/4,1,output);
  79. */
  80. ......
  81.  
  82. }
  83. }
  84. av_free_packet(packet);
  85. }
  86.  
  87. fclose(output);
  88.  
  89. ......
  90.  
  91. return 0;
  92. }


从代码中可以看出，解码后的视频帧数据保存在pFrame变量中，然后经过swscale函数转换后，将视频帧数据保存在pFrameYUV变量中。最后将pFrameYUV中的数据写入成文件。

在本代码中，将数据保存成了RGB24的格式。如果想保存成其他格式，比如YUV420，YUV422等，需要做2个步骤：

1.初始化pFrameYUV的时候，设定想要转换的格式：

  1. AVFrame *pFrame,*pFrameYUV;
  2. pFrame=avcodec_alloc_frame();
  3. pFrameYUV=avcodec_alloc_frame();
  4. uint8_t *out_buffer;
  5.  
  6. out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height)];
  7. avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height);

只需要把PIX_FMT_***改了就可以了

2.在sws_getContext()中更改想要转换的格式：

img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL);

也是把PIX_FMT_***改了就可以了

最后，如果想将转换后的原始数据存成文件，只需要将pFrameYUV的data指针指向的数据写入文件就可以了。

例如，保存YUV420P格式的数据，用以下代码：

  1. fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height),1,output);
  2. fwrite(pFrameYUV->data[1],(pCodecCtx->width)*(pCodecCtx->height)/4,1,output);
  3. fwrite(pFrameYUV->data[2],(pCodecCtx->width)*(pCodecCtx->height)/4,1,output);

保存RGB24格式的数据，用以下代码：

fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height)*3,1,output);

保存UYVY格式的数据，用以下代码：

fwrite(pFrameYUV->data[0],(pCodecCtx->width)*(pCodecCtx->height),2,output);

在这里又有一个问题，YUV420P格式需要写入data[0]，data[1]，data[2]；而RGB24，UYVY格式却仅仅是写入data[0]，他们的区别到底是什么呢？经过研究发现，在FFMPEG中，图像原始数据包括两种：planar和packed。planar就是将几个分量分开存，比如YUV420中，data[0]专门存Y，data[1]专门存U，data[2]专门存V。而packed则是打包存，所有数据都存在data[0]中。

具体哪个格式是planar，哪个格式是packed，可以查看pixfmt.h文件。注：有些格式名称后面是LE或BE，分别对应little-endian或big-endian。另外名字后面有P的是planar格式。

    1. /* 雷霄骅
    2. * 中国传媒大学/数字电视技术
    3. * leixiaohua1020@126.com
    4. *
    5. */
    6. /*
    7. * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
    8. *
    9. * This file is part of FFmpeg.
    10. *
    11. * FFmpeg is free software; you can redistribute it and/or
    12. * modify it under the terms of the GNU Lesser General Public
    13. * License as published by the Free Software Foundation; either
    14. * version 2.1 of the License, or (at your option) any later version.
    15. *
    16. * FFmpeg is distributed in the hope that it will be useful,
    17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
    18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    19. * Lesser General Public License for more details.
    20. *
    21. * You should have received a copy of the GNU Lesser General Public
    22. * License along with FFmpeg; if not, write to the Free Software
    23. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    24. */
    25.  
    26. #ifndef AVUTIL_PIXFMT_H
    27. #define AVUTIL_PIXFMT_H
    28.  
    29. /**
    30. * @file
    31. * pixel format definitions
    32. *
    33. */
    34.  
    35. #include "libavutil/avconfig.h"
    36.  
    37. /**
    38. * Pixel format.
    39. *
    40. * @note
    41. * PIX_FMT_RGB32 is handled in an endian-specific manner. An RGBA
    42. * color is put together as:
    43. * (A << 24) | (R << 16) | (G << 8) | B
    44. * This is stored as BGRA on little-endian CPU architectures and ARGB on
    45. * big-endian CPUs.
    46. *
    47. * @par
    48. * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
    49. * image data is stored in AVFrame.data[0]. The palette is transported in
    50. * AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
    51. * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
    52. * also endian-specific). Note also that the individual RGB palette
    53. * components stored in AVFrame.data[1] should be in the range 0..255.
    54. * This is important as many custom PAL8 video codecs that were designed
    55. * to run on the IBM VGA graphics adapter use 6-bit palette components.
    56. *
    57. * @par
    58. * For all the 8bit per pixel formats, an RGB32 palette is in data[1] like
    59. * for pal8. This palette is filled in automatically by the function
    60. * allocating the picture.
    61. *
    62. * @note
    63. * make sure that all newly added big endian formats have pix_fmt&1==1
    64. * and that all newly added little endian formats have pix_fmt&1==0
    65. * this allows simpler detection of big vs little endian.
    66. */
    67. enum PixelFormat {
    68. PIX_FMT_NONE= -1,
    69. PIX_FMT_YUV420P, ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
    70. PIX_FMT_YUYV422, ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
    71. PIX_FMT_RGB24, ///< packed RGB 8:8:8, 24bpp, RGBRGB...
    72. PIX_FMT_BGR24, ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    73. PIX_FMT_YUV422P, ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
    74. PIX_FMT_YUV444P, ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
    75. PIX_FMT_YUV410P, ///< planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
    76. PIX_FMT_YUV411P, ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
    77. PIX_FMT_GRAY8, ///< Y , 8bpp
    78. PIX_FMT_MONOWHITE, ///< Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb
    79. PIX_FMT_MONOBLACK, ///< Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb
    80. PIX_FMT_PAL8, ///< 8 bit with PIX_FMT_RGB32 palette
    81. PIX_FMT_YUVJ420P, ///< planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_range
    82. PIX_FMT_YUVJ422P, ///< planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_range
    83. PIX_FMT_YUVJ444P, ///< planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_range
    84. PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing
    85. PIX_FMT_XVMC_MPEG2_IDCT,
    86. PIX_FMT_UYVY422, ///< packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
    87. PIX_FMT_UYYVYY411, ///< packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
    88. PIX_FMT_BGR8, ///< packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
    89. PIX_FMT_BGR4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
    90. PIX_FMT_BGR4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
    91. PIX_FMT_RGB8, ///< packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
    92. PIX_FMT_RGB4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
    93. PIX_FMT_RGB4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
    94. PIX_FMT_NV12, ///< planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (first byte U and the following byte V)
    95. PIX_FMT_NV21, ///< as above, but U and V bytes are swapped
    96.  
    97. PIX_FMT_ARGB, ///< packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
    98. PIX_FMT_RGBA, ///< packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
    99. PIX_FMT_ABGR, ///< packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
    100. PIX_FMT_BGRA, ///< packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
    101.  
    102. PIX_FMT_GRAY16BE, ///< Y , 16bpp, big-endian
    103. PIX_FMT_GRAY16LE, ///< Y , 16bpp, little-endian
    104. PIX_FMT_YUV440P, ///< planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
    105. PIX_FMT_YUVJ440P, ///< planar YUV 4:4:0 full scale (JPEG), deprecated in favor of PIX_FMT_YUV440P and setting color_range
    106. PIX_FMT_YUVA420P, ///< planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
    107. PIX_FMT_VDPAU_H264,///< H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    108. PIX_FMT_VDPAU_MPEG1,///< MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    109. PIX_FMT_VDPAU_MPEG2,///< MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    110. PIX_FMT_VDPAU_WMV3,///< WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    111. PIX_FMT_VDPAU_VC1, ///< VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    112. PIX_FMT_RGB48BE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big-endian
    113. PIX_FMT_RGB48LE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as little-endian
    114.  
    115. PIX_FMT_RGB565BE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
    116. PIX_FMT_RGB565LE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
    117. PIX_FMT_RGB555BE, ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), big-endian, most significant bit to 0
    118. PIX_FMT_RGB555LE, ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), little-endian, most significant bit to 0
    119.  
    120. PIX_FMT_BGR565BE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
    121. PIX_FMT_BGR565LE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
    122. PIX_FMT_BGR555BE, ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), big-endian, most significant bit to 1
    123. PIX_FMT_BGR555LE, ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), little-endian, most significant bit to 1
    124.  
    125. PIX_FMT_VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
    126. PIX_FMT_VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
    127. PIX_FMT_VAAPI_VLD, ///< HW decoding through VA API, Picture.data[3] contains a vaapi_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    128.  
    129. PIX_FMT_YUV420P16LE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
    130. PIX_FMT_YUV420P16BE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
    131. PIX_FMT_YUV422P16LE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
    132. PIX_FMT_YUV422P16BE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
    133. PIX_FMT_YUV444P16LE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
    134. PIX_FMT_YUV444P16BE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
    135. PIX_FMT_VDPAU_MPEG4, ///< MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
    136. PIX_FMT_DXVA2_VLD, ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
    137.  
    138. PIX_FMT_RGB444LE, ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), little-endian, most significant bits to 0
    139. PIX_FMT_RGB444BE, ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0
    140. PIX_FMT_BGR444LE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1
    141. PIX_FMT_BGR444BE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1
    142. PIX_FMT_GRAY8A, ///< 8bit gray, 8bit alpha
    143. PIX_FMT_BGR48BE, ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big-endian
    144. PIX_FMT_BGR48LE, ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as little-endian
    145.  
    146. //the following 10 formats have the disadvantage of needing 1 format for each bit depth, thus
    147. //If you want to support multiple bit depths, then using PIX_FMT_YUV420P16* with the bpp stored seperately
    148. //is better
    149. PIX_FMT_YUV420P9BE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
    150. PIX_FMT_YUV420P9LE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
    151. PIX_FMT_YUV420P10BE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
    152. PIX_FMT_YUV420P10LE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
    153. PIX_FMT_YUV422P10BE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
    154. PIX_FMT_YUV422P10LE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
    155. PIX_FMT_YUV444P9BE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
    156. PIX_FMT_YUV444P9LE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
    157. PIX_FMT_YUV444P10BE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
    158. PIX_FMT_YUV444P10LE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
    159. PIX_FMT_YUV422P9BE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
    160. PIX_FMT_YUV422P9LE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
    161. PIX_FMT_VDA_VLD, ///< hardware decoding through VDA
    162.  
    163. #ifdef AV_PIX_FMT_ABI_GIT_MASTER
    164. PIX_FMT_RGBA64BE, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
    165. PIX_FMT_RGBA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
    166. PIX_FMT_BGRA64BE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
    167. PIX_FMT_BGRA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
    168. #endif
    169. PIX_FMT_GBRP, ///< planar GBR 4:4:4 24bpp
    170. PIX_FMT_GBRP9BE, ///< planar GBR 4:4:4 27bpp, big endian
    171. PIX_FMT_GBRP9LE, ///< planar GBR 4:4:4 27bpp, little endian
    172. PIX_FMT_GBRP10BE, ///< planar GBR 4:4:4 30bpp, big endian
    173. PIX_FMT_GBRP10LE, ///< planar GBR 4:4:4 30bpp, little endian
    174. PIX_FMT_GBRP16BE, ///< planar GBR 4:4:4 48bpp, big endian
    175. PIX_FMT_GBRP16LE, ///< planar GBR 4:4:4 48bpp, little endian
    176.  
    177. #ifndef AV_PIX_FMT_ABI_GIT_MASTER
    178. PIX_FMT_RGBA64BE=0x123, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
    179. PIX_FMT_RGBA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
    180. PIX_FMT_BGRA64BE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as big-endian
    181. PIX_FMT_BGRA64LE, ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
    182. #endif
    183. PIX_FMT_0RGB=0x123+4, ///< packed RGB 8:8:8, 32bpp, 0RGB0RGB...
    184. PIX_FMT_RGB0, ///< packed RGB 8:8:8, 32bpp, RGB0RGB0...
    185. PIX_FMT_0BGR, ///< packed BGR 8:8:8, 32bpp, 0BGR0BGR...
    186. PIX_FMT_BGR0, ///< packed BGR 8:8:8, 32bpp, BGR0BGR0...
    187. PIX_FMT_YUVA444P, ///< planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
    188.  
    189. PIX_FMT_NB, ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
    190. };
    191.  
    192. #define PIX_FMT_Y400A PIX_FMT_GRAY8A
    193. #define PIX_FMT_GBR24P PIX_FMT_GBRP
    194.  
    195. #if AV_HAVE_BIGENDIAN
    196. # define PIX_FMT_NE(be, le) PIX_FMT_##be
    197. #else
    198. # define PIX_FMT_NE(be, le) PIX_FMT_##le
    199. #endif
    200.  
    201. #define PIX_FMT_RGB32 PIX_FMT_NE(ARGB, BGRA)
    202. #define PIX_FMT_RGB32_1 PIX_FMT_NE(RGBA, ABGR)
    203. #define PIX_FMT_BGR32 PIX_FMT_NE(ABGR, RGBA)
    204. #define PIX_FMT_BGR32_1 PIX_FMT_NE(BGRA, ARGB)
    205. #define PIX_FMT_0RGB32 PIX_FMT_NE(0RGB, BGR0)
    206. #define PIX_FMT_0BGR32 PIX_FMT_NE(0BGR, RGB0)
    207.  
    208. #define PIX_FMT_GRAY16 PIX_FMT_NE(GRAY16BE, GRAY16LE)
    209. #define PIX_FMT_RGB48 PIX_FMT_NE(RGB48BE, RGB48LE)
    210. #define PIX_FMT_RGB565 PIX_FMT_NE(RGB565BE, RGB565LE)
    211. #define PIX_FMT_RGB555 PIX_FMT_NE(RGB555BE, RGB555LE)
    212. #define PIX_FMT_RGB444 PIX_FMT_NE(RGB444BE, RGB444LE)
    213. #define PIX_FMT_BGR48 PIX_FMT_NE(BGR48BE, BGR48LE)
    214. #define PIX_FMT_BGR565 PIX_FMT_NE(BGR565BE, BGR565LE)
    215. #define PIX_FMT_BGR555 PIX_FMT_NE(BGR555BE, BGR555LE)
    216. #define PIX_FMT_BGR444 PIX_FMT_NE(BGR444BE, BGR444LE)
    217.  
    218. #define PIX_FMT_YUV420P9 PIX_FMT_NE(YUV420P9BE , YUV420P9LE)
    219. #define PIX_FMT_YUV422P9 PIX_FMT_NE(YUV422P9BE , YUV422P9LE)
    220. #define PIX_FMT_YUV444P9 PIX_FMT_NE(YUV444P9BE , YUV444P9LE)
    221. #define PIX_FMT_YUV420P10 PIX_FMT_NE(YUV420P10BE, YUV420P10LE)
    222. #define PIX_FMT_YUV422P10 PIX_FMT_NE(YUV422P10BE, YUV422P10LE)
    223. #define PIX_FMT_YUV444P10 PIX_FMT_NE(YUV444P10BE, YUV444P10LE)
    224. #define PIX_FMT_YUV420P16 PIX_FMT_NE(YUV420P16BE, YUV420P16LE)
    225. #define PIX_FMT_YUV422P16 PIX_FMT_NE(YUV422P16BE, YUV422P16LE)
    226. #define PIX_FMT_YUV444P16 PIX_FMT_NE(YUV444P16BE, YUV444P16LE)
    227.  
    228. #define PIX_FMT_RGBA64 PIX_FMT_NE(RGBA64BE, RGBA64LE)
    229. #define PIX_FMT_BGRA64 PIX_FMT_NE(BGRA64BE, BGRA64LE)
    230. #define PIX_FMT_GBRP9 PIX_FMT_NE(GBRP9BE , GBRP9LE)
    231. #define PIX_FMT_GBRP10 PIX_FMT_NE(GBRP10BE, GBRP10LE)
    232. #define PIX_FMT_GBRP16 PIX_FMT_NE(GBRP16BE, GBRP16LE)
    233.  
    234. #endif /* AVUTIL_PIXFMT_H */
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原文地址：https://www.cnblogs.com/schips/p/11521453.html