.E... = Encoding supported E表示编码器 ..V... = Video codec V:视频编解码..A... = Audio codec A:音频编解码..S... = Subtitle codec S:字幕 ...I.. = Intra frame-only codec I:帧内预测压缩编码 ...L. = Lossy compression L :有损压缩 ...S = Lossless compression S:无损压缩 -...
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...
第一个0表示第一个视频, s表示是字幕, 第二个0表示第几个字幕文件 # 也可用-codec:s:0选项提取字幕: ffmpeg -i in.mp4 -vn -an -codec:s:0 srt out.srt # 如果报错找不到stream,可以查看视频信息,看是否包含字幕流。 #
Codecs:D...=Decoding supported D表示解码器.E...=Encoding supported E表示编码器..V...=Video codec V:视频编解码..A...=Audio codec A:音频编解码..S...=Subtitle codec S:字幕...I..=Intra frame-only codec I:帧内预测压缩编码...L.=Lossy compression L:有损压缩...S=Lossless compression...
avcodec_parameters_to_context(pAVCodecContext, in_stream->codecpar); bit_rate = pAVCodecContext->bit_rate; //打开解码器 ret = avcodec_open2(pAVCodecContext, pAVCodec, NULL); if (ret != 0) { qDebug() << "avcodec_open2 fail";
}while(0)#endif//For extractVideo#ifndef AV_RB16 # define AV_RB16(x) \ (((constuint8_t*)(x))[0] <<8) |\ ((constuint8_t*)(x))[1])#endifextern"C"{ #include<stdio.h>#include"libavcodec/avcodec.h"#include"libavformat/avformat.h"#include"libavutil/log.h"}//For extract...
--enable-libcodec2最后,C:\mingw\media-autobuild_suite-master\build\ffmpeg_options.txt# Lines starting with this character are ignored# Built-in options, use --disable- to disable them#--enable-cplayer#--enable-manpage-build#--enable-lua#--enable-javascript#--enable-libass#--enable-encoding...
Suppose our video has two streams: an audio encoded with AAC CODEC and a video encoded with H264 (AVC) CODEC. From each stream we can extract pieces (slices) of data called packets that will be loaded into components named AVPacket....
libavcodec aarch64 alpha arm avr32 bfin mips neon .gitignore 012v.c 4xm.c 8bps.c 8svx.c Makefile a64colors.h a64multienc.c a64tables.h aac.h aac_ac3_parser.c aac_ac3_parser.h aac_adtstoasc_bsf.c aac_defines.h aac_parser.c aaccoder.c aaccoder_trellis.h aaccoder_tw...
..S... = Subtitle codec ...I.. = Intra frame-only codec ...L. = Lossy compression ...S = Lossless compression --- 写的我想吐。。妹的!这么多。。。 image.png 可用的编码器 要显示内置的ffmpeg编码器的列表,我们可以使用以下命令: ffmpeg -encoders...