将bmp转换为yuv并保存 [英] Convert bmp to yuv and save

问题描述

我用这种方式将位图转换为yuv将位图保存到视频（libavcodec ffmpeg），然后像这样保存缓冲区：FILE * fp = fopen（aha.yuv，w）; if（！fp）返回NULL;的fwrite（&outPic- GT;数据[0]，为nbytes，1，FP）;的fwrite（outBuffer，为nbytes，1，FP）; FCLOSE（FP）;但它只有几行。所有.yuv文件都是灰色的。我确定inbuffer指向输入BGR32数据。那么哪里错了？是保存outBuffer的方法吗？

http：/ /stackoverflow.com/questions/1359620/save-bitmap-to-video-libavcodec-ffmpeg [ ^ ]

I use this way to convert bitmap to yuv Save bitmap to video (libavcodec ffmpeg) and then save the buffer like this: FILE* fp=fopen("aha.yuv","w"); if(!fp) return NULL; fwrite(outPic->data[0],nbytes,1,fp); fwrite(outBuffer,nbytes,1,fp); fclose(fp); but it has only several lines.All most all of the .yuv file is gray. I am sure the inbuffer points to the input BGR32 data.So where is wrong? is The way to save the outBuffer right?
http://stackoverflow.com/questions/1359620/save-bitmap-to-video-libavcodec-ffmpeg[^]

推荐答案

1。请使用这样的代码标签格式化您的来源

1. Please format your Source with code tag like this

FILE* fp=fopen("aha.yuv","w");
if(!fp) return NULL;
fwrite(outPic->data[0],nbytes,1,fp); 
fwrite(outBuffer,nbytes,1,fp);
fclose(fp);

2.你应该在二进制模式下使用fopen（）



3.看不到你写的Fileheader或Bitmap-Header，只有数据



4.有几种方法可以存储YUV -Images，请参阅：



YUVIT - 开源转换器到YUV色彩空间

https://github.com/stunpix/yuvit



yuv：平面格式

yuyv：打包格式

uyvy：打包格式

2. You should use fopen() in binary mode

3. Can´t see writing you Fileheader or Bitmap-Header, only Data

4. There are several ways to store YUV-Images, see:

YUVIT - open source convertor to YUV colorspace
https://github.com/stunpix/yuvit

yuv : Planar format
yuyv : Packed format
uyvy : Packed format

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