List of FFMPEG common parameters

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Basic options:
-Formats	Output all available formats
-F FMT	Specified format (audio or video format)
-I filename	Specify the input file name. in Linux, you can also specify 0.0 (screen recording) or camera.
-Y	Overwrite existing files
-T duration	Record length: T
-Fs limit_size	Sets the maximum file size.
-SS time_off	[-] Hh: mm: ss [. xxx] format is also supported starting from the specified time (s)
-Itsoffset time_off	Sets the Time offset (s). This option affects all subsequent input files. This offset is added to the timestamp of the input file. Defining a positive offset means that the corresponding stream is delayed by Offset seconds. [-] Hh: mm: ss [. xxx] format is also supported
-Title string	Title
-Timestamp time	Timestamp
-Author string	Author
-Copyright string	Copyright information
-Comment string	Comment
-Album string	Album name
-V verbose	Log-related
-Target type	Set the target file type ("VCD", "SVCD", "DVD", "DV", "dv50", "Pal-VCD ", "NTSC-SVCD ",...)
-Dframes number	Set the number of frames to be recorded
Video options:
-B	Specify the bit rate (bits/s). It seems that FFmpeg is an automatic VBR. If it is specified, it is probably the average bit rate.
-VB	Specify the video bit rate (bits/s)
-Vframes number	Sets the number of frames to be converted.
-R rate	FPS)
-S size	Resolution
-Aspect	Set the video aspect ratio (, or 1.3333, 1.7777)
-Croptop size	Set the size of the top part (in pixels)
-Cropbottom size	Set the bottom removal size (in pixels)
-Cropleft size	Set left cut size (in pixels)
-Cropright size	Set right cut size (in pixels)
-Padtop size	Set Top fill size (in pixels)
-Padbottom size	In pixels)
-Padleft size	Left complement (in pixels)
-Padright size	Right complement (in pixels)
-Padcolor color	Fill in the belt color (000000-ffffff)
-VN	Cancel video
-Vcodec Codec	Forced Use of codec encoding/decoding ('copy' to copy Stream)
-Sameq	Use the same video quality as the source (VBR)
-Pass n	Select the number of processing times (1 or 2 ). Two-time encoding is very useful. Statistical information is generated for the first time, and precise request bit rate is generated for the second time.
-Passlogfile File	Select two record file names as file
-Newvideo	Add a new video stream after the current video stream
Advanced Video options
-Pix_fmt format	Set pixel format, 'LIST' as argument shows all the pixel formats supported
-Intra	Only applicable to intra-frame encoding
-Qscale Q	VBR Based on <value> quality. value range: 0.01-255. The smaller the quality, the better.
-Loop_input	Set the number of cycles of the input stream (currently only valid for images)
-Loop_output	Set the number of cycles of the output video. For example, if the value is set to 0 when the GIF is output, it indicates an infinite loop.
-G int	Set image group size
-Cutoff int	Set the cutoff frequency
-Qmin int	Set minimum quality
-Qmax int	Set maximum quality
-Qdiff int	Maximum deviation between quantization scales (VBR)
-BF int	Use frames B frame, supports mpeg1, MPEG2, MPEG4
Audio options:
-AB	Set the bit rate (unit: bit/s, maybe the old version is kb/s)
-Aframes number	Set the number of frames to be converted.
-AQ Quality	Set audio quality (encoding)
-AR rate	Set the audio sampling rate (unit: Hz)
-AC Channels	Set the number of channels
-	Cancel audio
-Acodec Codec	Specify the Audio Encoding ('copy' to copy Stream)
-Vol volume	Set the recording volume (256 by default)
-Newaudio	Add a new audio stream after the current audio stream
Subtitle options:
-Sn	Cancel subtitle
-Scodec Codec	Set subtitle encoding ('copy' to copy Stream)
-Newsubtitle	Added after the current subtitle
-Slang code	Sets the ISO 639 encoding used for subtitles (3 letters)
Audio/Video capture options:
-VC channel	Set the video capture channel (only for dv1394)
-Tvstd Standard	Set TV standard NTSC pal (SECAM)