print_str("filename", fmt_ctx->filename);
print_int("nb_streams", fmt_ctx->nb_streams);
print_str("format_name", fmt_ctx->iformat->name);
- print_str("format_long_name", fmt_ctx->iformat->long_name);
+ if (fmt_ctx->iformat->long_name) print_str ("format_long_name", fmt_ctx->iformat->long_name);
+ else print_str_opt("format_long_name", "unknown");
print_time("start_time", fmt_ctx->start_time, &AV_TIME_BASE_Q);
print_time("duration", fmt_ctx->duration, &AV_TIME_BASE_Q);
if (size >= 0) print_val ("size", size, unit_byte_str);