ffmpeg -hwaccel 若显示“Missing argument for option 'hwaccel'.”报错信息,则说明正在使用的ffmpeg是具备硬件加速能力的版本。进一步测试可以准备供转码用的视频,重命名为input.mp4,执行如下指令。 ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -c:a copy -c:v h264_nvenc -b:v ...
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\ return AVERROR(EINVAL); \ } \ } while (0) /* named group separators, e.g. -i */ //opt 为输入源选项,也就是 -i if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) { GET_ARG(arg...
av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\ return AVERROR(EINVAL); \ } \ } while (0)/* 参数格式是否为“-i xxx”,如果匹配,返回1 */if((ret=match_group_separator(groups,nb_groups,opt))>=0){// 获取参数对应的值GET_ARG(arg);/** * 将输入的路...
static void init_parse_context(OptionParseContext *octx, const OptionGroupDef *groups, int nb_groups) { static const OptionGroupDef global_group = { "global" }; int i; memset(octx, 0, sizeof(*octx)); //将groups,groups内容填充到octx对应的结构中 octx->nb_groups = nb_groups; octx...
libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 Missing argument for option 'v'. Error splitting the argument list: Invalid argument...
fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt); exit(1); } } if (po->flags & OPT_STRING) { char *str; str = av_strdup(arg); *po->u.str_arg = str; } else if (po->flags & OPT_BOOL) { *po->u.int_arg = bool_val; ...
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you can check its capabilities by running ffmpeg without arguments or with an optional-hide_bannerflag. You can also use thehelpoption for the main program as well as any of its many sub-commands. The dazzling array of features can be intimidating, so we shall proceed slowly but surely. Th...
opt[1]||dashdash+1==optindex){finish_group(octx,0,opt);av_log(NULL,AV_LOG_DEBUG," matched as %s.\n",groups[0].name);continue;}opt++;#define GET_ARG(arg) \do { \arg = argv[optindex++]; \if (!arg) { \av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n...