FFCLI

This project is meant to build FFmpeg command line arguments parser. This is roughly a ported ffmpeg.

AVOptions have not been fully supported(options related to SWRESAMPLE and SWSCALE is not supported).

You can test by using cargo test.

To build it, you should compile the FFmpeg then use the PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" cargo build to build it(where PKG_CONFIG_PATH points to *.pc files in the FFmpeg build result).

And you can use cargo run -- -i input -c:v libx264 -profile:v main -preset:v fast -level 3.1 -x264opts crf=18 to check program outputs (I changed the av_logs in FFmpeg's source code to log::{debug, error, info}, so you will see roughly the same debug message when specific parameters are given.)

Current output:

[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Splitting the commandline.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-i' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as input url with argument 'input'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-c:v' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as option 'c' (codec name) with argument '"libx264"'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-profile:v' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as option 'profile' (set profile) with argument '"main"'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-preset:v' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as AVOption 'preset:v' with argument 'fast'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-level' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as AVOption 'level' with argument '3.1'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Reading option '-x264opts' ...
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils]  matched as AVOption 'x264opts' with argument 'crf=18'.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Trailing option(s) found in the command: may be ignored.
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Finished splitting the commandline.
OptionParseContext {
    global_opts: OptionGroup {
        group_def: OptionGroupDef {
            name: "global",
            sep: None,
            flags: NONE,
        },
        arg: "",
        opts: [],
    },
    groups: [
        OptionGroupList {
            group_def: OptionGroupDef {
                name: "output url",
                sep: None,
                flags: OPT_OUTPUT,
            },
            groups: [],
        },
        OptionGroupList {
            group_def: OptionGroupDef {
                name: "input url",
                sep: Some(
                    "i",
                ),
                flags: OPT_INPUT,
            },
            groups: [
                OptionGroup {
                    group_def: OptionGroupDef {
                        name: "input url",
                        sep: Some(
                            "i",
                        ),
                        flags: OPT_INPUT,
                    },
                    arg: "input",
                    opts: [],
                },
            ],
        },
    ],
    cur_group: OptionGroup {
        group_def: OptionGroupDef {
            name: "never_used",
            sep: None,
            flags: NONE,
        },
        arg: "",
        opts: [
            OptionKV {
                opt: OptionDef {
                    name: "c",
                    help: "codec name",
                    argname: Some(
                        "codec",
                    ),
                    flags: HAS_ARG | OPT_STRING | OPT_SPEC | OPT_INPUT | OPT_OUTPUT,
                    u: (Union)OptionOperation {
                        val: 96,
                    },
                },
                key: "c:v",
                val: "libx264",
            },
            OptionKV {
                opt: OptionDef {
                    name: "profile",
                    help: "set profile",
                    argname: Some(
                        "profile",
                    ),
                    flags: HAS_ARG | OPT_EXPERT | OPT_PERFILE | OPT_OUTPUT,
                    u: (Union)OptionOperation {
                        val: 94742012944672,
                    },
                },
                key: "profile:v",
                val: "main",
            },
        ],
    },
}
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Parsing a group of options: global .
[2020-06-23T18:56:50Z DEBUG ffcli::cmdutils] Successfully parsed a group of options.

This program is under the original license of FFmpeg.