我的图片格式为“YUV422_8_UYVY”，其中包含 AV_PIX_FMT_UYVY422 格式，我尝试在平面“ AV_PIX_FMT_YUVJ422P ”中尝试转换，但是尚未成功，下面是我正在工作的代码。
错误消息：使用[swscaler @ 004b3fa0] deprecetd像素格式，确保正确设置了范围
具有0 k大小的结果图像（文件）
av_image_alloc（）的最后一个参数，如16,32等转换
我的目标是以平面yuv格式转换数据包yuv图像
static AVCodecContext *pCodecCtx;
static AVFormatContext *pFormatCtx;
static AVCodec *pCodec;
static AVOutputFormat* fmt;
static AVFrame *RawPic;
static AVFrame *ScalePic;
static AVPacket pkt;
static AVStream* video_st;
static FILE *file;
static struct SwsContext *sws_ctx;
enum AVPixelFormat src_pix_fmt = AV_PIX_FMT_UYVY422;
enum AVPixelFormat dst_pix_fmt = AV_PIX_FMT_YUVJ422P;
int main( ) {
FILE *in_file = NULL; //packed Source
FILE *out_file = NULL; //planar output
int in_width = 2448; //YUV's width
int in_height = 2050; //YUV's heigh
int out_width = 2448; //YUV's width
int out_height = 2050; //YUV's heigh
unsigned long int ret;
in_file = fopen("c:\\yuv422_8_uyvy.yuv","rb"); //Source Input File
if(in_file == NULL) { printf("\n\tinput File Opening error...!!"); exit(1); }
out_file = fopen("d:\\test_Planar.yuv", "wb"); //Source Input File
if(out_file == NULL) { printf("\n\toutput File Opening error...!!"); exit(1); }
else { printf("\n\tOutput File Created...!!"); }
//------Loads the whole database of available codecs and formats------
av_register_all();
printf("\t\n\tCodac database Loaded...\n");
//------Contex Variable assignment--------------------------------
pFormatCtx = avformat_alloc_context();
fmt = NULL;
fmt = av_guess_format("mjpeg",NULL,NULL);
pFormatCtx->oformat = fmt;
video_st = avformat_new_stream(pFormatCtx, 0); if (video_st==NULL) return -1;
pCodecCtx = video_st->codec;
pCodecCtx->codec_id = fmt->video_codec;
pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
pCodecCtx->pix_fmt = src_pix_fmt;
printf("\t\n\tContex Variable assigned...\n");
//------Allocate Source Image Buffer--------------------------------
AVFrame *RawPic = av_frame_alloc();
if(!RawPic) { printf("\nCould not allocate Raw Image frame\n"); exit(1);}
RawPic->format = pCodecCtx->pix_fmt;
RawPic->width = in_width;
RawPic->height = in_height;
ret = av_image_alloc(RawPic->data,RawPic->linesize,in_width,in_height,src_pix_fmt, 16);
if(ret < 0) { printf("\nCould not allocate raw picture buffer\n"); exit(1);}
printf("\n\tAllocate Source Image Buffer");
//------Allocate Desitnation Image Buffer-------------------
AVFrame *ScalePic = av_frame_alloc();
if(!ScalePic) { printf("\nCould not allocate Scale Image frame\n"); exit(1);}
ScalePic->format = pCodecCtx->pix_fmt;
ScalePic->width = out_width;
ScalePic->height = out_height;
ret = av_image_alloc(ScalePic->data,ScalePic->linesize,out_width,out_height,dst_pix_fmt, 32);
if(ret < 0) { printf("\nCould not allocate Scale picture buffer\n"); exit(1);}
dst_bufsize = ret;
printf("\n\tAllocate Destination Image Buffer");
//------Create scaling context------------------------------sws_getContex
printf("\t\n\tCreating Scaling context..[sws_getContext]\n");
sws_ctx = sws_getContext( in_width, in_height, src_pix_fmt,
out_width, out_height, dst_pix_fmt,
SWS_BICUBIC, NULL, NULL, NULL);
if(!sws_ctx) { printf("\nContext Error..\n"); }
printf("\t\n\tScaling context...Created\n");
//------Create scaling context---OR CONVERTED TO DESTINATION FORMAT--
sws_scale(sws_ctx, RawPic->data, RawPic->linesize, 0, in_height, ScalePic->data, ScalePic->linesize);
printf("\t\n\tCreating Scaling context...sws_scale...done\n");
int num_bytes = avpicture_get_size(src_pix_fmt,in_width,in_height);
uint8_t* ScalePic_Buffer = (uint8_t *)av_malloc(num_bytes*sizeof(int8_t));
avpicture_fill((AVPicture*)ScalePic,ScalePic_Buffer,AV_PIX_FMT_YUVJ422P,out_width,out_height);
//-----Write Scale Image to outputfile----------------------------
fwrite(ScalePic->data,1,dst_bufsize,out_file);
//---Release all memory and close file----------------------------------
fclose(in_file);
fclose(out_file);
avcodec_close(pCodecCtx);
av_free(pCodecCtx);
av_freep(&RawPic->data[0]);
av_frame_free(&RawPic);
av_freep(&ScalePic->data[0]);
av_frame_free(&ScalePic);
av_frame_free(&RawPic);
printf("\n\n");
system("PAUSE");
exit(1);
}
答案 0 :(得分：0)
你的代码中有很多错误。我可以给你一些关于它们的线索，但是你应该尝试将所有的东西都放下来让它最终发挥作用。
dst_bufsize = ret;，否则dst_bufsize将始终为0. fwrite的第一个参数应该是ScalePic->data[0]而不是ScalePic->data。fread上致电in_file，这意味着您从未在源图片文件中阅读。avpicture_fill使用ScalePic，它会覆盖ScalePic中的内容。对于你的问题：
av_image_alloc的最后一个参数是align - 用于缓冲区大小对齐的值。[swscaler @ 004b3fa0] deprecetd pixel format used, make sure you did set range correctly这不是错误消息，而是警告，不会导致转换失败。答案 1 :(得分：0)
我已成功使用以下代码
转换平面格式的YUV打包图像FILE *in_file = NULL; //fopen("myHexFile.yuv","rb"); input PACKED
FILE *out_file = NULL; //Output File Planar format
int in_width = 2448; //YUV's width
int in_height = 2050; //YUV's heigh
int out_width = 2448; //YUV's width
int out_height = 2050; //YUV's heigh
int in_linesize[4];
int out_linesize[4];
uint8_t *in_data[4], *out_data[4];
unsigned long int out_bufsize,in_bufsize;
in_file = fopen("myHexFile.yuv","rb"); //This is YUV422-UYVY Input packed image
if(in_file == NULL)
{
this->Print2TextBox1(L"Input File Opening error...!");
exit(1);
}
out_file = fopen("d:\\myHexFile_Planar.yuv", "wb"); //Source Input File
if(out_file == NULL)
{
this->Print2TextBox1(L"toutput File Opening error...!!");
exit(1);
}
else { this->Print2TextBox1(L"Output File Created...!!\n"); }
//-Loads the whole database of available codecs and formats-------
av_register_all();
this->Print2TextBox1(L"Codac database Loaded...\n");
//---Create scaling context------------------------sws_getContex
this->Print2TextBox1(L"Creating Scaling context..\n");
sws_ctx = sws_getContext( in_width, in_height, src_pix_fmt,
out_width,out_height,dst_pix_fmt,
SWS_BICUBIC, NULL, NULL, NULL);
if(!sws_ctx) { this->Print2TextBox1(L"Context Error..\n"); }
//--Allocate Source Image Buffer--------------------------
this->Print2TextBox1(L"Allocate Source Image Buffer...\n");
AVFrame *RawPic = av_frame_alloc();
if(!RawPic)
{
this->Print2TextBox1(L"Could not allocate Raw Image frame\n");
exit(1);
}
RawPic->format = src_pix_fmt;
RawPic->width = in_width;
RawPic->height = in_height;
int num_bytes1 = avpicture_get_size(src_pix_fmt,in_width,in_height);
uint8_t* RawPic_Buffer = (uint8_t*)av_malloc(num_bytes1*sizeof(int8_t));
ret =av_image_alloc(RawPic->data,in_linesize,in_width,in_height,src_pix_fmt, 1);
if(ret < 0)
{
this->Print2TextBox1(L"Could not allocate raw picture buffer\n");
exit(1);
}
in_bufsize = ret;
//------Reading Input Image and Store in RawPic->Data Pointer---
fread(RawPic->data[0],1,in_bufsize,in_file);
//----Allocate Desitnation Image Buffer-------------------
this->Print2TextBox1(L"Allocate Destination Image Buffer...\n");
AVFrame *ScalePic = av_frame_alloc();
if(!ScalePic)
{
this->Print2TextBox1(L"Could not allocate Scale Image frame\n");
exit(1);
}
ScalePic->format = dst_pix_fmt;//pCodecCtx->pix_fmt;
ScalePic->width = out_width;
ScalePic->height = out_height;
int num_bytes2 = avpicture_get_size(dst_pix_fmt,out_width,out_height);
uint8_t* ScalePic_Buffer = (uint8_t *)av_malloc(num_bytes2*sizeof(int8_t));
ret = av_image_alloc(ScalePic->data,out_linesize,out_width,out_height,dst_pix_fmt, 1); //16
if(ret < 0) { this->Print2TextBox1(L"Could not allocate Scale picture buffer\n"); exit(1);}
out_bufsize = ret;
//-Create scaling context-OR CONVERTED TO DESTINATION FORMAT-----sws_scale
this->Print2TextBox1(L"Creating Scaling context...sws_scale\n");
sws_scale(sws_ctx, RawPic->data, in_linesize, 0, ScalePic->height, ScalePic->data, out_linesize);
//-----Write Scale Image to outputfile-
this->Print2TextBox1(L"Write Scale Image to outputfile..\n");
fwrite(ScalePic->data[0],1,out_bufsize,out_file);
//---Release all memory and close file--
fclose(in_file);
fclose(out_file);
av_freep(&RawPic->data[0]);
av_freep(&ScalePic->data[0]);
av_frame_free(&ScalePic);
av_frame_free(&RawPic);