| Print help/info: | Description |
|:-------------------|:-------------------------------|
| --help topic | show help |
| -version | show version |
| -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 |
| -protocols | show available protocols |
| -filters | show available filters |
| -pix_fmts | show available pixel formats |
| -sample_fmts | show available sample formats |
| -hwaccels | show available HW acceleration |
| Global options: | Description |
|:-------------------|:-------------------------------|
| -v loglevel | set logging level |
| -y | overwrite output files |
| -n | never overwrite output files |
| -filter_threads | number of filter threads |
| -vol volume | change audio volume(256=normal)|
| main options: | Description |
|:-------------------|:-------------------------------|
| -f fmt | force format |
| -c codec | codec name |
| -codec codec | codec name |
| -t duration | duration seconds of audio/video|
| -to time_stop | record or transcode stop time |
| -ss time_off | set the start time offset |
| -frames number | set the number of frames |
| -discard | discard |
| -disposition | disposition |
| Video options: | Description |
|:-------------------|:-------------------------------|
| -vframes number | set the number of video frames |
| -r rate | set frame rate (Hz value) |
| -s size | set frame size |
| -aspect aspect | set aspect ratio (4:3, 16:9) |
| -vn | disable video |
| -vcodec codec | force video codec |
| -vf filter_graph | set video filters |
| -ab bitrate | audio bitrate (please use -b:a)|
| -b bitrate | video bitrate (please use -b:v)|
| Audio options: | Description |
|:-------------------|:-------------------------------|
| -aframes number | set the number of audio frames |
| -aq quality | set audio quality |
| -ar rate | set audio sampling rate (in Hz)|
| -ac channels | set number of audio channels |
| -an | disable audio |
| -acodec codec | force audio codec |
| -vol volume | change audio volume(256=normal)|
| -af filter_graph | set audio filters |