### - a -

- accurate_seek : InputFile , OptionsContext
- apad : OptionsContext , OutputStream
- arg : OptionGroup
- argname : OptionDef
- attachment_filename : OutputStream
- attachments : OptionsContext
- audio_channel_maps : OptionsContext
- audio_channels : OptionsContext
- audio_channels_map : OutputStream
- audio_channels_mapped : OutputStream
- audio_disable : OptionsContext
- audio_sample_rate : OptionsContext
- autorotate : InputStream , OptionsContext
- autoscale : OptionsContext , OutputStream
- avfilter : OutputStream