【FFmpeg】FFmpeg 帮助文档使用 |
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【FFmpeg】FFmpeg 帮助文档使用
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一、ffmpeg 命令帮助文档
查询 ffmpeg 基本信息 : ffmpeg -h查询 ffmpeg 高级信息 : ffmpeg -h long查询 ffmpeg 所有信息 : ffmpeg -h full三种帮助信息的关系 : 所有信息 包含 高级信息 , 高级信息 包含 基本信息 ; 1、FFmpeg 命令帮助基本信息 将 ffmpeg 基本信息输出到文件中 : 将信息输出到文件中 , 使用 > 符号 , 后面跟上文件名称 , 就会将信息输出到该文件名对应的目录中 ; ffmpeg -h > ffmpeg_h.txt在 " D:\ffmpeg " 目录下执行 上述命令 , 在该目录下生成了 ffmpeg_h.txt 文件 ;
ffmpeg_h.txt 文件中的输出内容如下 : Hyper fast Audio and Video encoder usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}... Getting help: -h -- print basic options -h long -- print more options -h full -- print all options (including all format and codec specific options, very long) -h type=name -- print all options for the named decoder/encoder/demuxer/muxer/filter/bsf/protocol See man ffmpeg for detailed description of the options. Print help / information / capabilities: -L show license -h topic show help -? topic show help -help topic show help --help topic show help -version show version -buildconf show build configuration -formats show available formats -muxers show available muxers -demuxers show available demuxers -devices show available devices -codecs show available codecs -decoders show available decoders -encoders show available encoders -bsfs show available bit stream filters -protocols show available protocols -filters show available filters -pix_fmts show available pixel formats -layouts show standard channel layouts -sample_fmts show available audio sample formats -colors show available color names -sources device list sources of the input device -sinks device list sinks of the output device -hwaccels show available HW acceleration methods Global options (affect whole program instead of just one file): -loglevel loglevel set logging level -v loglevel set logging level -report generate a report -max_alloc bytes set maximum size of a single allocated block -y overwrite output files -n never overwrite output files -ignore_unknown Ignore unknown stream types -filter_threads number of non-complex filter threads -filter_complex_threads number of threads for -filter_complex -stats print progress report during encoding -max_error_rate maximum error rate ratio of decoding errors (0.0: no errors, 1.0: 100% errors) above which ffmpeg returns an error instead of success. -bits_per_raw_sample number set the number of bits per raw sample -vol volume change audio volume (256=normal) Per-file main options: -f fmt force format -c codec codec name -codec codec codec name -pre preset preset name -map_metadata outfile[,metadata]:infile[,metadata] set metadata information of outfile from infile -t duration record or transcode "duration" seconds of audio/video -to time_stop record or transcode stop time -fs limit_size set the limit file size in bytes -ss time_off set the start time offset -sseof time_off set the start time offset relative to EOF -seek_timestamp enable/disable seeking by timestamp with -ss -timestamp time set the recording timestamp ('now' to set the current time) -metadata string=string add metadata -program title=string:st=number... add program with specified streams -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 outp |
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