Function pix_fmt_parse

fftools/ffmpeg_mux_init.c:525–572

}

static enum AVPixelFormat pix_fmt_parse(OutputStream *ost, const char *name)
{
    const enum AVPixelFormat *fmts;
    enum AVPixelFormat fmt;
    int ret;

    fmt = av_get_pix_fmt(name);
    if (fmt == AV_PIX_FMT_NONE) {
        av_log(ost, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", name);
        return AV_PIX_FMT_NONE;
    }

    ret = avcodec_get_supported_config(ost->enc->enc_ctx, NULL, AV_CODEC_CONFIG_PIX_FORMAT,
                                       0, (const void **) &fmts, NULL);
    if (ret < 0)
        return AV_PIX_FMT_NONE;

    /* when the user specified-format is an alias for an endianness-specific
     * one (e.g. rgb48 -> rgb48be/le), it gets translated into the native
     * endianness by av_get_pix_fmt();
     * the following code handles the case when the native endianness is not
     * supported by the encoder, but the other one is */
    if (fmts && !pixfmt_in_list(fmts, fmt)) {
        const char *name_canonical = av_get_pix_fmt_name(fmt);
        int len = strlen(name_canonical);

        if (strcmp(name, name_canonical) &&
            (!strcmp(name_canonical + len - 2, "le") ||
             !strcmp(name_canonical + len - 2, "be"))) {
            char name_other[64];
            enum AVPixelFormat fmt_other;

            snprintf(name_other, sizeof(name_other), "%s%ce",
                     name, name_canonical[len - 2] == 'l' ? 'b' : 'l');
            fmt_other = av_get_pix_fmt(name_other);
            if (fmt_other != AV_PIX_FMT_NONE && pixfmt_in_list(fmts, fmt_other)) {
                av_log(ost, AV_LOG_VERBOSE, "Mapping pixel format %s->%s\n",
                       name, name_other);
                fmt = fmt_other;
            }
        }
    }

    if (fmts && !pixfmt_in_list(fmts, fmt))
        fmt = choose_pixel_fmt(ost->enc->enc_ctx, fmt);

    return fmt;
}

static int new_stream_video(Muxer *mux, const OptionsContext *o,
                            OutputStream *ost, int *keep_pix_fmt,