// 设置编码器的参数AVCodecContext *codec_ctx = video_stream->codec;codec_ctx->bit_rate = 400000; // 设置比特率为400kbpscodec_ctx->gop_size = 12; // 设置GOP大小为12codec_ctx->max_b_frames = 2; // 设置B帧的最大数量为2 在这段代码中,我们设置了编码器的比特率、GOP大小和B帧的最大...
Describe the bug Unable to import frames from video using ffmpeg I have configured ffmpeg, it is the latest version of the build that I downloaded. But when I use ffmpeg to import video frames, it doesn't work and the progress bar stays ...
src_filename, output_dir); /* read frames from the file */ while (av_read_frame(...
AVPacket packet;intframeFinished;struct SwsContext*sws_ctx=NULL;// Initialize SWS context for software scaling.sws_ctx=sws_getContext(pCodecCtx->width,pCodecCtx->height,pCodecCtx->pix_fmt,pCodecCtx->width,pCodecCtx->height,AV_PIX_FMT_RGB24,SWS_BILINEAR,NULL,NULL,NULL);// Read frames and...
流中的数据元素被称为「帧(frames)」。每路流都会被相应的「编/解码器(codec)」进行编码或解码(codec 这个名字就是源于 COded 和 DECoded)。codec 定义了实际数据是如何被编解码的,比如你用到的 codecs 可能是 DivX 和 MP3。「数据包(packets)」是从流中读取的数据片段,这些数据片段中包含的一个个比特就是...
int64_t nb_frames; // 该码流的总帧数 AVDictionary *metadata; // 一些文件信息头,key/value 字符串 AVRational avg_frame_rate; // 平均帧率 这里可以拿到平均帧率。 AVCodecContext则记录了一路流的具体编码信息,其中关键的成员包括: const struct AVCodec *codec; // 编码的详细信息 ...
String storagePath = Environment.getExternalStorageDirectory().getPath(); File videoPath = new File(storagePath + "/Download/testVideo.mp4"); videoFrame(videoPath.toString(), storagePath + "/Download/video_frames/"); } } // 实例化运行库中的方法 ...
* decode the following frames into another rawvideo file. */fprintf(stderr,"Error: Width, height and pixel format have to be ""constant in a rawvideo file, but the width, height or ""pixel format of the input video changed:\n""old: width = %d, height = %d, format = %s\n""new...
"channel_layout":"stereo","bits_per_sample":0,"r_frame_rate":"0/0","avg_frame_rate":"0/0","time_base":"1/44100","start_pts":0,"start_time":"0.000000","duration_ts":4141046,"duration":"93.901270","bit_rate":"127948","max_bit_rate":"132760","nb_frames":"4045","...
(avstmp->codec->codec_type == AVMEDIA_TYPE_VIDEO) {avmi->videoStreamIndex = i;avmi->width = avstmp->codec->width;avmi->height = avstmp->codec->height;// 视频帧率:avg_frame_rate// fps:frames per secondif (avstmp->avg_frame_rate.num != 0&& avstmp->avg_frame_rate.den != ...