codecpar->codec_tag)); if ((ret = avcodec_parameters_copy(newStream->codecpar, st...
(videoStream->codecpar->codec_id); m_totalFrames = videoStream->nb_frames; #if PRINT_LOG qDebug() << QString("分辨率:[w:%1,h:%2] 帧率:%3 总帧数:%4 解码器:%5") .arg(m_size.width()).arg(m_size.height()).arg(m_frameRate).arg(m_totalFrames).arg(codec->name); #endif ...
然后,你所要做的就是将音频从源文件复制到目标文件。使用-acodec copy命令即可完成操作,该命令告诉FFmpeg只复制音频而不对其进行重新编码。ffmpeg -i videoWithAudio.mp4 -vn -acodec copy onlyAudio.aac很简单,对不对? 现在让我们看下另一种情况:当你提取音频后想要重新对它进行编码。下面是如何使用FFmpeg从视频...
Use new template function Jan 12, 2025 include Allow user to select audio codec when opening an audio device Jan 29, 2025 scripts Use new ffmpeg binary Feb 19, 2025 tests Add Codec.canonical_name Feb 19, 2025 .gitignore Use f-strings in video and subtitle dir ...
[ffmpeg] Remove nvcodec's dependency on cuda [pkgconfig] Add additional common system libraries. [vcpkg_fixup_pkgconfig] Add to ffnvcodec, ogg, sdl2, speex, x265, wavpack, vorbis, opus Fixes#7084,Fixes#9671,Fixes#7544 Sorry, something went wrong. ...
outStream = avformat_new_stream(oFmtCtx,nullptr); // 设置输出音频参数 inStream = pFmtCtx->streams[idx]; avcodec_parameters_copy(outStream->codecpar,inStream->codecpar); outStream->codecpar->codec_tag = 0; // 绑定 ret = avio_open2(&oFmtCtx->pb,dst,AVIO_FLAG_WRITE,nullptr,nullptr)...
FFmpeg -i source_video.avi input -acodec-ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4 Convert a video for the PSP using FFmpeg FFmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 ...
importffmpeg# 转码视频文件为MP4格式input_video ='path/to/input/video.avi'output_video ='path/to/output/video.mp4'ffmpeg.input(input_video,format='avi', vcodec='mpeg4').output(output_video, vcodec='libx264', acodec='aac').run() ...
它包含了非常先进的音频/视频编解码库libavcodec,为了保证高可移植性和编解码质量,libavcodec里很多code都是从头开发的FFmpeg在Linux平台下开发,但它同样也可以在其它操作系统环境中编译运行,包括Windows、Mac OS X等。这个项目最早由Fabrice Bellard发起,2004年至2015年间由Michael Niedermayer主要负责维护。许多FFmpeg的...
// BaseEncoder.cppvoidBaseEncoder::OpenEncoder(){// 调用子类方法,根据音频和视频的不同,初始化编码上下文InitContext(m_codec_ctx);int ret=avcodec_open2(m_codec_ctx,m_codec,NULL);if(ret<0){LOG_ERROR(TAG,LogSpec(),"Fail to open encoder : %d",m_codec);return;}m_encode_stream_index=Con...