虽然FFmpeg本身有cuvid硬解,但是找不到什么好的资料,英伟达的SDK比较容易懂,参考FFmpeg源码,将NVIDIA VIDEO CODEC SDK的数据获取改为FFmpeg获取,弥补原生SDK不能以流作为数据源的不足。所用SDK版本为Video_Codec_SDK_7.1.9,英伟达官网可下载。 1.修改数据源 首先是FFmpeg的一些常规的初始化 bool VideoSource::init(...
memset(inbuf + INBUF_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE); /* find the H264 video decoder */ codec = avcodec_find_decoder(AV_CODEC_ID_H264); if (!codec) { fprintf(stderr, "Codec not found\n"); exit(1); } //初始化 AVCodecParserContext parser = av_parser_init(codec->id);...
if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) // 音频流或视频流 { // 3.1 查找编码器AVCodec,本例使用与解码器相同的编码器 AVCodec *encoder = NULL; if ((dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) && (strcmp(v_enc_name, "copy")...
-vcodec codec force video codec ('copy' to copy stream) -timecode hh:mm:ss[:;.]ff set initial TimeCode value. -pass n select the pass number (1 to 3) -vf filter_graph set video filters -b bitrate video bitrate (please use -b:v) -dn disable data Advanced Video options: -pix_f...
-vcodec codec force video codec ('copy' to copy stream) -timecode hh:mm:ss[:;.]ff set initial TimeCode value. -pass n select the pass number (1 to 3) -vf filter_graph set video filters -b bitrate video bitrate (please use -b:v) ...
fprintf(stderr, "Could not allocate video codec context\n"); exit(1); } /* For some codecs, such as msmpeg4 and mpeg4, width and height MUST be initialized there because this information is not available in the bitstream. */
(m_AVFormatContext,AVMEDIA_TYPE_VIDEO,-1,-1,nullptr,0);if(m_StreamIndex==-1){}//5.获取解码器参数AVCodecParameters*codecParameters=m_AVFormatContext->streams[m_StreamIndex]->codecpar;//6.获取解码器m_AVCodec=avcodec_find_decoder(codecParameters->codec_id);if(m_AVCodec==nullptr){}//7.创建...
} else if (codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { videoChannel = new VideoChannel; } } if (!audioChannel && !videoChannel) { LOGE("没有音视频"); callHelper->onError(THREAD_CHILD, FFMPEG_NOMEDIA); return; } // 准备完了 通知java 你随时可以开始播放 callHelper->onPrepare(THRE...
("Usage: %s <input file> <output file>\nAnd check your input file is encoded by mpeg1video please.\n",os.Args[0])os.Exit(0)}filename=os.Args[1]outfilename=os.Args[2]pkt=libavcodec.AvPacketAlloc()ifpkt==nil{os.Exit(1)}/* set end of buffer to 0 (this ensures that no over...