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@ -7,70 +7,76 @@ ffprobe用于检测多媒体流格式；ffplay用于播放视频,包括本地与 |
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# 一、ffmpeg命令行 |
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## 1、命令行参数介绍 |
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Print help / information / capabilities:<br> |
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--help topic$~~~~~~~~$show help<br> |
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-version$~~~~~~~~~~~~$show version<br> |
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-formats$~~~~~~~~~~~~$show available formats<br> |
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-muxers$~~~~~~~~~~~~~$show available muxers<br> |
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-demuxers$~~~~~~~~~~~$show available demuxers<br> |
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-devices$~~~~~~~~~~~~$show available devices<br> |
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-codecs$~~~~~~~~~~~~~$show available codecs<br> |
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-decoders$~~~~~~~~~~~$show available decoders<br> |
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-encoders$~~~~~~~~~~~$show available encoders<br> |
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-bsfs$~~~~~~~~~~~~~~~$show available bit stream filters<br> |
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-protocols$~~~~~~~~~~$show available protocols<br> |
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-filters$~~~~~~~~~~~~$show available filters<br> |
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-pix_fmts$~~~~~~~~~~~$show available pixel formats<br> |
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-sample_fmts$~~~~~~~~$show available audio sample formats<br> |
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-hwaccels$~~~~~~~~~~~$show available HW acceleration methods<br> |
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|:--------|:--------| |
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|--help topic |show help<br> |
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|-version |show version<br> |
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|-formats |show available formats<br> |
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|-muxers |show available muxers<br> |
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|-demuxers |show available demuxers<br> |
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|-devices |show available devices<br> |
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|-codecs |show available codecs<br> |
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|-decoders |show available decoders<br> |
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|-encoders |show available encoders<br> |
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|-bsfs |show available bit stream filters<br> |
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|-protocols |show available protocols<br> |
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|-filters |show available filters<br> |
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|-pix_fmts |show available pixel formats<br> |
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|-sample_fmts |show available audio sample formats<br> |
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|-hwaccels |show available HW acceleration methods<br> |
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Global options (affect whole program instead of just one file:<br> |
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-v loglevel$~~~~~~~~~$set logging level<br> |
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-y$~~~~~~~~~~~~~~~~~~$overwrite output files<br> |
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-n$~~~~~~~~~~~~~~~~~~$never overwrite output files<br> |
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-filter_threads$~~~~~$number of non-complex filter threads<br> |
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-stats$~~~~~~~~~~~~~~$print progress report during encoding<br> |
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-vol volume$~~~~~~~~~$change audio volume (256=normal)<br> |
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|:--------|:--------| |
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|-v loglevel |set logging level<br> |
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|-y |overwrite output files<br> |
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|-n |never overwrite output files<br> |
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|-filter_threads |number of non-complex filter threads<br> |
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|-stats |print progress report during encoding<br> |
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|-vol volume |change audio volume (256=normal)<br> |
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Per-file main options:<br> |
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-f fmt$~~~~~~~~~~~~~~$force format<br> |
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-c codec$~~~~~~~~~~~~$codec name<br> |
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-codec codec$~~~~~~~~$codec name<br> |
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-t duration$~~~~~~~~~$record or transcode "duration" seconds of audio/video<br> |
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-to time_stop$~~~~~~~$record or transcode stop time<br> |
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-fs limit_size$~~~~~~$set the limit file size in bytes<br> |
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-ss time_off$~~~~~~~~$set the start time offset<br> |
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-sseof time_off$~~~~~$set the start time offset relative to EOF<br> |
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-frames number$~~~~~~$set the number of frames to output<br> |
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-filter filter_graph set stream filtergraph<br> |
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-discard$~~~~~~~~~~~~$discard<br> |
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-disposition$~~~~~~~~$disposition<br> |
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|:--------|:--------| |
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|-f fmt |force format<br> |
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|-c codec |codec name<br> |
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|-codec codec |codec name<br> |
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|-t duration |record or transcode "duration" seconds of audio/video<br> |
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|-to time_stop |record or transcode stop time<br> |
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|-fs limit_size |set the limit file size in bytes<br> |
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|-ss time_off |set the start time offset<br> |
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|-sseof time_off |set the start time offset relative to EOF<br> |
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|-frames number |set the number of frames to output<br> |
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|-filter filter_graph |set stream filtergraph<br> |
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|-discard |discard<br> |
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|-disposition |disposition<br> |
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Video options:<br> |
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-vframes number$~~~~~$set the number of video frames to output<br> |
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-r rate$~~~~~~~~~~~~~$set frame rate (Hz value, fraction or abbreviation)<br> |
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-s size$~~~~~~~~~~~~~$set frame size (WxH or abbreviation)<br> |
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-aspect aspect$~~~~~~$set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)<br> |
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-bits_per_raw_sample number set the number of bits per raw sample<br> |
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-vn$~~~~~~~~~~~~~~~~~$disable video<br> |
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-vcodec codec$~~~~~~~$force video codec ('copy' to copy stream)<br> |
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-vf filter_graph$~~~~$set video filters<br> |
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-ab bitrate$~~~~~~~~~$audio bitrate (please use -b:a)<br> |
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-b bitrate$~~~~~~~~~~$video bitrate (please use -b:v)<br> |
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|:--------|:--------| |
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|-vframes number |set the number of video frames to output<br> |
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|-r rate |set frame rate (Hz value, fraction or abbreviation)<br> |
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|-s size |set frame size (WxH or abbreviation)<br> |
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|-aspect aspect |set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)<br> |
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|-bits_per_raw_sample |number set the number of bits per raw sample<br> |
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|-vn |disable video<br> |
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|-vcodec codec |force video codec ('copy' to copy stream)<br> |
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|-vf filter_graph |set video filters<br> |
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|-ab bitrate |audio bitrate (please use -b:a)<br> |
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|-b bitrate |video bitrate (please use -b:v)<br> |
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Audio options:<br> |
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-aframes number$~~~~~$set the number of audio frames to output<br> |
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-aq quality$~~~~~~~~~$set audio quality (codec-specific)<br> |
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-ar rate$~~~~~~~~~~~~$set audio sampling rate (in Hz)<br> |
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-ac channels$~~~~~~~~$set number of audio channels<br> |
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-an$~~~~~~~~~~~~~~~~~$disable audio<br> |
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-acodec codec$~~~~~~~$force audio codec ('copy' to copy stream)<br> |
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-vol volume$~~~~~~~~~$change audio volume (256=normal)<br> |
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-af filter_graph$~~~~$set audio filters<br> |
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|:--------|:--------| |
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|-aframes number |set the number of audio frames to output<br> |
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|-aq quality |set audio quality (codec-specific)<br> |
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|-ar rate |set audio sampling rate (in Hz)<br> |
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|-ac channels |set number of audio channels<br> |
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|-an |disable audio<br> |
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|-acodec codec |force audio codec ('copy' to copy stream)<br> |
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|-vol volume |change audio volume (256=normal)<br> |
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|-af filter_graph |set audio filters<br> |
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Subtitle options:<br> |
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-s size$~~~~~~~~~~~~~$set frame size<br> |
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-sn$~~~~~~~~~~~~~~~~~$disable subtitle<br> |
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-scodec codec$~~~~~~~$force subtitle codec ('copy' to copy stream)<br> |
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|:--------|:--------| |
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|-s size |set frame size<br> |
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|-sn |disable subtitle<br> |
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|-scodec codec |force subtitle codec ('copy' to copy stream)<br> |
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命令行整体格式：以ffmpeg开头，参数之间用空格隔开，每个参数key以"-"开头，后面跟着参数value，输出文件放在命令行最后。<br> |
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xufulong
3 years ago