《1》、旧接口 代码语言:javascript 复制 intParseH264ExtraDataInMp4(int stream_id,AVPacket*packet){uint8_t*dummy=NULL;int dummy_size;AVBitStreamFilterContext*bsfc=av_bitstream_filter_init("h264_mp4toannexb");if(bsfc==NULL){envir()<<"cannot open the h264_mp4toannexb\n";return-1;}av_b...
int ret = avutil.av_frame_make_writable(ost.frame); if (ret < 0) { throw new IOException(ret + ":av_frame_make_writable error"); } // convert to destination format ret = swresample.swr_convert(ost.swr_ctx, ost.frame.data(), (int) dst_nb_samples, frame.data(), frame.nb_sampl...
FFmpeg Batch AV Converter is an Open Source FFmpeg GUI that allows users to harness the full potential ofFFmpeg. FFmpeg Batch AV Converter allows you to drag and drop, see progress information, change encoding priority, pause/resume, and set automatic shutdown. It is geared to be usable for ...
To work with multimedia we can use the AMAZING tool/library called FFmpeg. Chances are you already know/use it directly or indirectly (do you use Chrome?).It has a command line program called ffmpeg, a very simple yet powerful binary. For instance, you can convert from mp4 to the ...
ffmpegis a command line toolbox to manipulate, convert and stream multimedia content. ffplayis a minimalistic multimedia player. ffprobeis a simple analysis tool to inspect multimedia content. Additional small tools such asaviocat,ismindexandqt-faststart. ...
av_samples_alloc() -- 创建样本空间 swr_convert() -- 数据重采样 av_audio_fifo_write() -- 将数据存储到fifo缓存中 // 编码 av_audio_fifo_read() -- 从fifo缓存中读取pcm数据 avcodec_encode_audio2() -- 将数据进行编码 } 1. 2.
av_dump_format(ofmt_ctx, 0, OUTPUTURL, 1); AVBitStreamFilterContext * m_vbsf_aac_adtstoasc; //aac->adts to asc过滤器 m_vbsf_aac_adtstoasc = av_bitstream_filter_init("aac_adtstoasc"); while (1) { AVStream *in_stream, *out_stream; ...
AVFrame *frame =av_frame_alloc();intframe_finished =0;avcodec_decode_audio4(codec_ctx, frame, &frame_finished, &packet);if(frame_finished) {fwrite(frame->data[0],1, frame->linesize[0], output_file_ptr); }av_frame_free(&frame); ...
av_q2d()将时间从AVRational形式转换为double形式。AVRational是分数类型,double是双精度浮点数类型,转换的结果单位是秒。转换前后的值基于同一时间基,仅仅是数值的表现形式不同而已。 qv_q2d()实现如下: /*** Convert an AVRational to a `double`.* @param a AVRational to convert* @return `a` in floatin...
convertToFormat(QImage::Format_RGB888); // 初始化转换上下文 if (m_swsEnContext == NULL) { m_swsEnContext = sws_getContext(_img.width(), _img.height(), AV_PIX_FMT_RGB24, m_enContext->width, m_enContext->height, m_enContext->pix_fmt, SWS_FAST_BILINEAR, NULL, NULL, NULL); ...