ffmpeg5.1 资源遍历

协议遍历

    std::cout << "=== input protocols ===" << std::endl;
    const char* protocol = avio_enum_protocols(&opaque, 0);
    while (protocol != NULL) {
        std::cout << protocol << std::endl;
        protocol = avio_enum_protocols(&opaque, 0);
    }

    std::cout << "=== output protocols ===" << std::endl;
    protocol = avio_enum_protocols(&opaque, 1);
    while (protocol != NULL) {
        std::cout << protocol << std::endl;
        protocol = avio_enum_protocols(&opaque, 1);
    }

解封装器遍历

    std::cout << "=== demuxer ===" << std::endl;
    const AVInputFormat* inputFormat = av_demuxer_iterate(&opaque);
    while (inputFormat != NULL) {
        std::cout << inputFormat->name << std::endl;
        inputFormat = av_demuxer_iterate(&opaque);
    }

封装器遍历

    std::cout << "=== muxer ===" << std::endl;
    opaque = NULL;
    const AVOutputFormat* outputFormat = av_muxer_iterate(&opaque);
    while (outputFormat != NULL) {
        std::cout << outputFormat->name << std::endl;
        outputFormat = av_muxer_iterate(&opaque);
    }

编码器遍历

    std::cout << "=== encoder ===" << std::endl;
    opaque = NULL;
    const AVCodec* avCodec = av_codec_iterate(&opaque);
    while (avCodec != NULL) {
        if (av_codec_is_encoder(avCodec)) {
            std::cout << avCodec->name << std::endl;
        }
        avCodec = av_codec_iterate(&opaque);
    }

解码器遍历

    std::cout << "=== decoder ===" << std::endl;
    opaque = NULL;
    avCodec = av_codec_iterate(&opaque);
    while (avCodec != NULL) {
        if (av_codec_is_decoder(avCodec)) {
            std::cout << avCodec->name << std::endl;
        }
        avCodec = av_codec_iterate(&opaque);
    }

bsf遍历

bsf需要添加头文件

#include "libavcodec/bsf.h"

    std::cout << "=== bsf ===" << std::endl;
    opaque = NULL;
    const AVBitStreamFilter* bsf = av_bsf_iterate(&opaque);
    while (bsf != NULL) {
        std::cout << bsf->name << std::endl;
        bsf = av_bsf_iterate(&opaque);
    }