("sws_scale return %d",h) << std::endl; } else { std::cout << vformat("Write video frame %d,size=%d,width=%d,height=%d,fmt=%s", this->video_frame_counter_++, this->src_image_data_buffer_size_, frame->width, frame->height, av_get_pix_fmt_name(AVPixelFormat(frame->format)...
<<endl; return -1; } return 0; } 二.视频图像帧的循环转换 视频格式转换的核心函数是sws_scale(),我们需要给出输出图像的缓存地址和缓存宽度,然后循环处理即可。下面给出代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //video_swscale_core.cpp int32_t transforming(int32_t frame_cnt){ ...
fprintf(stderr, "Error during decoding\n"); return ret; } // 转换像素 sws_scale(img_convert_ctx, (const uint8_t *const *)frame->data, frame->linesize, 0, pDecoderCtx->height, sw_frame->data, sw_frame->linesize); saveYuv(sw_frame); printf("Succeed to decode all frame!\n"); ...
假设CPU有多个核心(或机器有多个CPU),你可以运行sws_scale的多个实例,每个帧仍然是200ms,但如果你可以同时做更多的事情,它会降低平均值。 收藏分享票数0 EN Stack Overflow用户 发布于 2020-11-07 05:23:39 我不认为问题出在sws_scale上,我也不相信你可以真正优化它,因为转换发生在CPU上。 如果你真的想要良...
constintret=sws_scale(img_convert_ctx, (constuint8_t**)src_data, src_linesize, 0, height, dst_data,dst_linesize); if(ret<0){ fprintf(stderr,"Error while converting\n"); return-1; } // 释放SWS上下文 sws_freeContext(img_convert_ctx); ...
* Allocate and return an SwsContext. You need it to perform * scaling/conversion operations using sws_scale(). * * @param srcW the width of the source image * @param srcH the height of the source image * @param srcFormat the source image format ...
5.2、sws_scale 5.2.1、SwsContext中的swscale() 5.2.2、check_image_pointers 5.2.3、usePal 5.3、sws_freeContext 六、实例 一、概述 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还做了相应指令集的优化,因此...
return -1; } if (got_picture) { sws_scale(img_convert_ctx, (const unsigned char* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize); //输出出YUV数据 int y_size = pCodecCtx->width * pCodecCtx->height; ...
- Scale item positions/lengths by percentage - Search takes - Set volume and pan of selected takes - Set volume of selected items - Show/hide floating item/track info - Skip select items from selected items - Skip select items in selected tracks - Spread selected items over tracks - Swing...
input_frame是问题所在。将sws_scale_frame(encoder->sws_ctx, input_frame, input_frame);替换为：