toEOF-seek_timestamp enable/disable seeking by timestampwith-ss-timestamp timesetthe recordingtimestamp('now'tosetthe current time)-metadata string=string add metadata-program title=string:st=number...add programwithspecified streams-target type specify target filetype("vcd","svcd","dvd","dv"or...
-targettypespecify target filetype("vcd","svcd","dvd","dv"or"dv50"with optional prefixes"pal-","ntsc-"or"film-") -apad audio pad -frames numbersetthe number of frames to output -filter filter_graphsetstream filtergraph -filter_script filenamereadstream filtergraph description from a file ...
ffmpeg -c:a dca -i input.dts -c:a libfdk_aac output.m4a ※通常可以省略解码器设定,FFmpeg 将会自动呼叫合适的解码器。 音讯编码器 (Audio Encoders) 以下编码器与选项只列出常用部分,详细说明请参考官网说明文件。 ※AAC-LC 品质 aac >= libfdk_aac > libfaac > libvo_aacenc aac AAC 音讯编码器。...
* If a source file does not specify a duration, but does specify * a bitrate, this value will be estimated from bitrate and file size. */ int64_t duration; #if LIBAVFORMAT_VERSION_INT < (53<<16) char language[4]; /** ISO 639-2/B 3-letter language code (empty string if undefin...
muxer/demuxer是分别保存在全局变量AVOutputFormat *first_oformat与 AVInputFormat *first_iformat中的。 encoder/decoder都是保存在全局变量AVCodec *first_avcodec中的。 二者都用函数指针的方式作为开放的公共接口 demuxer开放的接口有: int (*read_probe)(AVProbeData *); ...
-vstats_version Version of the vstats format to use. -intra_matrix matrix specify intra matrix coeffs -inter_matrix matrix specify inter matrix coeffs -chroma_intra_matrix matrix specify intra matrix coeffs -top top=1/bottom=0/auto=-1 field first ...
-target type specify target file type ("vcd", "svcd", "dvd", "dv" or "dv50" with optional prefixes "pal-", "ntsc-" or "film-") -apad audio pad -frames number set the number of frames to output -filter filter_graph set stream filtergraph ...
-target type specify target file type ("vcd", "svcd", "dvd", "dv" or "dv50"with optional prefixes "pal-", "ntsc-" or "film-")设置目标文件格式 -apad audio pad -frames number set the number of frames to output 设置帧数 -filter filter_graph set stream filtergraph 设置流...
av_log(NULL, AV_LOG_ERROR, "You have to specify one input file.\n"); av_log(NULL, AV_LOG_ERROR, "Use -h to get full help or, even better, run 'man %s'.\n", program_name); ret = AVERROR(EINVAL); } else if (input_filename) { ...
st=number...add programwithspecified streams-targettypespecify target filetype("vcd","svcd","dvd","dv"or"dv50"withoptional prefixes"pal-","ntsc-"or"film-")-apad audio pad-framesnumbersetthenumberofframes to output-filter filter_graph//滤镜-filter_script filename//从文件中读取滤镜的描述...